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DXT User Manual - I.C.T. Power Company Inc.

1. 54 55 SP 9 RTD Option 56 57 SPA Set Password acd ac E EH Dd co Hodie t epe ede a a TE EE RU dede 58 SP Commu nications 2 espe eas eel UD e Pie Hoi Pa api EID eee 58 5 12 System Setpoints dea tct is aed eine ae eee eee 59 60 5 13 Calibration amp Service coge Hd dena suae e ee rnb tcu dco ne Dod dede 61 Chapter 6 Metering Pages tee tp de tert 62 72 Metering Page List x ete eta edet eate ed etd 62 6 1 1 Metering Menu amp Data Metering 1 62 6 1 2 Metering Metering 2 Sette 62 6 1 3 RTD Option Values Metering 3 62 61 4 Status Metering Page 4 cece dn ree aia bre E i e En b rre tr De E 63 6 1 5 Event Recorder Metering 5 442445 63 6 1 6 Last Trip Metering Page 6 eerte ee efe et d tu be det 63 61 7 Statistics Metering Page 7 he e d o mined 64 6 2 Metering Menu and Explanation en E ae ELE RO qo EV x Eua ug 65 MET Metering Dat a 5 cni ete ib be ertet vr Eee dele ECCE EO 66 2 ET A te tenete e ett
2. lt of event gt IA THHHHHE IB 1HHHHHE Vbc HEHBEHBHE IC G F THHHE P F HHHH A Screen 1 Screen 1 Screen 1b Gd cause of event IA IB Vbc 59 Event ys HEHH G F 4HHHE P F HHH 60th Event lt of event gt THHHEHE IB Vab V bc HEHBEHBE SHE BE IC G F HHHE P F All events will be viewed from oldest event buffer to most recent event Motortronics Inc Page 70 DXT Digital Solid State Starter User Manual 39 1250A MP 6 Metering Metering Page 6 Displays the last trip information Screen 1 Displays the cause of the last trip Screen 2 Displays the measured phase current at the time of the trip Screen 3 Displays the Vab Vbc Vca and power factor at the time of trip Screen 4 Displays the imbalance percentage the frequency and the kW at the time of the trip Screen 5 Displays the hottest stator RTD temperature when RTD option present at time of the trip Screen 6 Displays the hottest non stator RTD temperature when RTD option present at the time of the trip Motortronics Inc MENU Y
3. 24 26 4 1 Keypad Operator 24 4 1 1 Keypad Operator designations and 25 4 2 Menu Navigation E 25 4 2 1 Password 26 4 2 2 Changing Setpoints hae er d en neg te 26 Chapter 5 Setpoint Programming 27 62 5 1 56 16 ath e btt e ea 27 33 5 1 1 Basic Configuration Setpoint Page 1 27 5 1 2 Starter Configuration Setpoint Page 2 27 5 1 3 Phase and Ground Settings Setpoint Page 3 28 5 1 4 Relay Assignments Setpoint 29 5 1 5 Relay Configuration Setpoint Page 5 30 5 1 6 User I O Configuration Setpoint Page 6 30 5 1 7 Custom Acceleration Curve Setpoint 7 31 5 1 8 Overload Curve Configuration Setpoint Page 8 31 Motortronics Page 2 DXT Digital Solid State Starter User Manual 39 1250A Table of Con
4. 5 Solid State Motor Control INSTALLATION amp OPERATION MANUAL MANUAL REV 5 30 02042301MN 08 13 12 FIRMWARE VERSION 7 21 DXT Digital Solid State Starter User Manual 39 1250A Table of Contents PAGE Chapter 1 4 11 doli cere ver stp AM Ac 4 1 2 SPECIIGAUONG See AM 4 6 1 3 cree err 7 14 taa leac tent Ese e Eel 8 1 5 Protection esc oto cS 9 1 6 Thermal Overload Protection eene nnne entente nnns nnn ettet innen nensi nnns entente nns 10 11 Chapter 2 Installation 1 ee idee rd e bee ctetu lue ande de deeded Ld ee 12 19 2 1 Recelving arid Uripacklng i tere etlam tta itas 12 2 2 Initial Unit InSpectiori D D iet Ua te D oe eene 12 2 3 M 12 2 4 Mounting and Cleaning 1 2i Ie eoe dep Tute beet DE ek Eee 12 2 5 Power Terminal Wire Range and Tightening
5. 12 VASE DI 13 2 7 Power Connections uiii epi dace pe e E ec Me eed dats Pe ad ur Pepe redd E PUT daga 14 2 8 2 tipi db Hue ag dulce bte do e d deg e Du Duc bee adele 14 15 2 9 Reference Section iege e du eee Pe and que ap i o abc ke Pepe ee 16 2 9a Optional RT D Board cuiii ge dd acis di i d ap redde do an 16 2 9b Power Board epe ee epe ape sis edge area ec Re Edge TY ge mundis 17 2 9c CPU BOatd 1 3 5 rep tb p Eg dd acra ndi t le d o bip edic bo 18 2 9d Communication Boardi iehi nine aia n acea de eee eta dio ee DR eodd 19 Chapter 3 Start p iae E HG EHE eee Pa adele eee Mae 20 23 3 1 Preliminary Start Up Check 20 3 2 Ihntroductlons ETERS ee ie ote b dentata tans dati attentes tes 20 3 3 Acceleration 4 nennen nenas 20 3 4 Deceleration 21 22 3 5 Sequence of Normal 23 Chapter 4 User Interface and Menu
6. TE Description oe ee Range Section Trip AUX1 Fail Safe No SP5 1 i Trip AUX1 Relay Latched Yes SP5 2 5 g Alarm AUX2 Fail Safe No SP5 1 5 359 Alarm AUX2 Relay Latched No SP5 2 otc 9520 Yes or No c 8 E o 5 AUX Relay Fail Safe No SP5 1 gt AUX3 Relay Latched No SP5 2 D AUX4 Relay Fail Safe No SP5 1 AUX4 Relay Latched No SP5 2 5 1 6 User I O Configuration Setpoint Page 6 Setpoint Security Factory Setting Page Level 2 Password Protected Page 6 User I O Configuration Description Default Section Tachometer Scale Selection Disabled Enabled or Disabled Manual Tach Scale 4 0 mA 0 RPM 0 3600 SP6 1 Manual Tach Scale 20 0 mA 2000 RPM 0 3600 Tach Accel Trip Mode Select Disabled Underspeed Overspeed or Disabled Tach Ramp Time 20 sec 1 120 Tach Underspeed Trip PT 1650 RPM 0 3600 SP6 2 Tach Overspeed Trip PT 1850 RPM 0 3600 Tach Accel Trip Delay 1 sec 1 60 Off RPM 0 3600 Hottest Non Stator RTD Analog Output 1 RMS Current CMe Motor Load 0 600 kW SP6 3 Analog Output 1 4mA 0 0 65535 Analog Output 1 20mA 250 0 65535 Analog Output 2 Motor Load Same As Analog Input 1 Analog Output 2 4mA 0 0 65535 SP6 4 Analog Output 2 20mA 1000 0 65535 User Programmable External Inputs External Input 1 Select Disabled Enabled or Disa
7. Page Level Description Default Section Default Display Screen Metering Data Page 1 Enter Metering Page 1 3 Enter Metering Screen 2 1 1 10 Metering Data Screen 1 Page 4 b Page 3 1 29 Page 4 1 6 Alarms RTD Failure Alarm Disabled Enabled or Disabled SP122 2 3 Thermal Register Alarm 90 Off 40 95 5 2 Thermal Alarm Delay 10 sec 1 20 sec N e E Thermal Register Setup Info 99 E Cold Stall Time O L Class n ead 5 30 or 4 40 second time E 2 Hot Stall Time Ye Class Ye O L Class 4 40 sec a 2 Stopped Cool Down Time 30 Min 10 300 Min m Runing Cool Down Time 15 Min 10 300 Min Relay Measured Cool Rates Disabled Enabled or Disabled SP12 3 Thermal Register Minimum 1596 10 50 Motor Design Ambient Temp 40C 10 90C Motor Design Run Temperature 80 Max 50 100 of Motor Stator Max Temp Motor Stator Max Temp INS CLS INS CLS 10 240 C Input to Thermal Register Enabled Enabled or Disabled Use Calculated K or Assign 7 1 50 On Press Enter to Clr Thermal Reg SP12 4 5 1 13 Calibration and Service Setpoint Page 13 Setpoint Security Factory Setting Description ion Level Default Set Date and Time FACTORY SET S gt DDMMYY HHMM BEL HH HH FACTORY SET 3 2 ES 9 Enter Date DDMMYYYY Bh HH HHH D 1 31 M 1 12 Y 1970 2069 SP13 1 o 9 5 Enter Time HH MM FACTORY 00 23 0 59
8. JOG VOLTAGE 50 Range 5 75 or Off Increments of 5 START RAMP 1 TYPE VOLTAGE Options Voltage Current or Off START RAMP 2 DISABLED Options Voltage Y Ez or Off A Range 1 120 SEC Increments of 1 CURRENT LIMIT 2 350 FLA Range 200 500 Increments of 10 KICK START TYPE DISABLED 65 Range Voltage or Disabled P DECELERATION DISABLED Range Enabled or Disabled KICK START VOLTAGE Range 10 100 Increments of 5 ip 0 50 SEC Range 0 10 2 00 SEC Increments of 0 10 TIMED OUTPUT TIME OFF Increments of 10 Range 1 1000 SEC KICK START TIME 100 Range 80 100 Increments of 1 START DECEL VOLTAGE RUN DELAY TIME 1 SEC VOLTAGE 30 STOP DECELERATION Range 0 30 SEC Off Increments of 1 AT SPEED DELAY TIME 1 SEC Range 0 30 Increments of 1 Range 0 99 A Increments of 1 DECELERATION TIME 5 SEC Range 1 60 SEC Increments of 1 d BYPASS PULL IN CURRENT 100 FLA Range 90 300 of 1 Motortronics Inc or INITIAL VOLTAGE INITIAL POWER 2 60 2 20 _ oie Tf 0 100 Range 0 100 oie Tf of 1 Increments of 1 RAMP TIME RAMP TIME 2 10 SEC 2 10 SEC Range 1 120 SEC Increments of 1 Range 200 500 Increments of 10 M
9. METERING PAGE 6 LAST TRIP CAUSE OF TRIP VALUE AT TIME OF TRIP Y la lb THEHE lc G F THEHHES Vab Vbc fHHHHHE P F HHHEHE 96 Hz KW IHHHHHHE HOTTEST STATOR RTD HOTTEST NON STATOR RTD C Page 71 DXT Digital Solid State Starter User Manual 39 1250A MP 7 Statistics Metering Page 7 Displays the statistical trip information Screen 01 Displays the total of megawatt hours Screen 02 Displays the accumulated total running hours Screen 03 Clears the total running hour count Screen 04 Displays the total number of trips since the last clearing of the statistical data and the total number of short circuit trips Screen 05 Displays the number of start overload and run overload trips since the last clearing of the statistical data Screen 06 Displays the number of frequency trips and Imbalance trips Screen 07 Displays the number of overcurrent trips Screen 08 Displays the number of Stator and non Stator RTD Trips Screen 09 Displays the number of Ground Fault Hi and Lo Set trips Screen 10 Displays the number of acceleration time trips Screen 11 Displays the number of start under curve trips Screen 12 Displays the number start over curve trips Screen 13 Displays the number of I2T start curve trips Screen 14 Displays the number of learned
10. Replace the Main Circuit Board Board Check the Motor and the Motor Morar connections Remove Power and perform the Faulty SCs SCR device checks Motor vibrates Trip AUX1 Motor growls while Faulty Gate Cathode SOR E ior slaving the testing procedure extremely unbalanced motor Faulty Main Circuit currents run mode Bad Replace the Main Circuit Board T Troubleshoot and repair Faulty Motor Wiring replace wiring Alarm AUX2 euet Replace the Main Circuit Board Board Motortronics Inc Page 75 DXT Digital Solid State Starter User Manual 39 1250A 7 2 SCR Testing Procedure Warning Failure to remove both line and control power before starting or this procedure may cause personal injury or death Remove both line power and control power from the unit and lock out Disconnect any two motor load leads and any two line leads Disconnect the SCR connections to main control board J1 J2 and J3 Refer to section 2 9b for the main control board layout Note the type of color coding of the wires connected to J1 J2 and J3 Two possible configurations are used Both configurations have 4 wires going to each plug The first configuration consists of 4 wires color coded black yellow grey and white The second configuration consists of 4 wires color coded red white red white The testing procedure for SCRs is comprised of two separate tests
11. Transformer size is adequate to power built in bypass contactors on these models Recommended Transformer Sizes for Control Power 2 8 1 Three Wire Connection a Connect N C normally closed stop button between pins 3 and 4 of TB4 Interlock Stop Start Connect N O normally open start button between pins 4 and 5 of terminal Control Control block TB4 Power Power Source Return Motortronics Page 14 DXT Digital Solid State Starter User Manual 39 1250A 2 8 2 Two Wire Connection TB4 An alternate connection for unattended operation replaces start stop push buttons by connecting a maintained contact closure between pins 3 and 5 on TB4 When the maintained contact is used for start stop it is necessary to set the overload setpoint to the manual reset position This will prevent the motor from restarting if Bro t Control the thermal overload trips and then cools off Power Source Return Warning When two wire connection method is used the start circuit must be Two Wire Connection interlocked to prevent automatic restart when either of the two protective devices overload or thermostat reset Thermostats always automatically reset on cool down 2 8 3 Programmable Relays Relay Contacts All the relay contacts are FORM C Com and N C It is recommended fusing all contacts with external fuses The DXT has four programmable relays on TB3 on the power board The relays are rated fo
12. MOTOR STOPPED READY TO START MOTOR STARTING MULT OF FLA MOTOR RUNNING AT X FLA LAST TRIP CAUSE NONE or trip cause PROGRAMMING SETPOINTS MOTOR STATUS Displays relay state upon error UNKNOWN STATE epee j Motortronics Inc MENU METERING PAGE 4 STATUS CURRENT STATUS O L TIME LEFT TO TRIP TRIP SEC Screen 3 1 THERM INH TIME LEFT Ht MIN Screen 4 1 COAST DOWN TIMER TIME LEFT MIN Screen 5 1 TIME BETWEEN STARTS TIME MIN Screen6 _ o y STARTS PER HOUR TIME THE Ht HH HH HH HH Page 69 DXT Digital Solid State Starter User Manual 39 1250A MP 5 Metering Metering Page 5 Displays the information in the Event Recorder Screen 1 Displays the event i e Imbalance Trip with the date and time it occurred Screen 1a Displays the current at Phase A B C and the ground fault at the time of the trip Note Ground fault option must be present Screen 1b Displays the Vbc and power factor at the time of trip MENU DOWN ARROW 4 TIMES METERING PAGE 5 EVENT RECORDER 60 events Screen 1 Screen 1 Screen 1b dob vent lt cause of event lt gt IB THHHHHE gt Vab Vbc HEHBEHBHE HE 2HHHHHE G F HHHH P F HHHH
13. PIS KVA HHHHHE Screen 3 Displays kW and kVA P F Screen 4 Displays kVAR and Power Factor PEAK ON kW Screen 5 Displays Peak On and kW demand PEAK ON kVA Screen 6 Displays Peak On and kVA demand PEAK ON THEE Screen 7 Displays Peak On and kVAR demand PEAK ON THEE AMPS 1HHHHE Screen 8 Displays the average current during start 2 4 0 lt lt gt lt gt lt lt lt gt lt gt PRESS ENTER CLEA DEMAND VALUES Screen 9 Clears Demand Values MWH USED Screen 10 Displays the Megawatt hours used PRESS ENTER TO CLEAR MWH VALUES Screen 11 Press Enter to clear statistics on MWH values Motortronics Inc Page 67 DXT Digital Solid State Starter User Manual 39 1250A MP 3 Metering Metering Page 3 Displays the RTD information When RTD option is installed METERING PAGE 3 MENU RTD VALUES DOWN ARROW 2 TIMES Screen 1 Displays the hottest stator RTD 1 6 depending upon number of RTDs used for stator Screen 2 Displays the hottest non stator RTD 7 12 if 1 6 is used for stator Screen 3 Displays the temperature of stator phase 1 in and F Screen 4 Displays the maximum temperature for RTD 1 since the last command to clear the thermal register Screen 5 2
14. stator Check with megger or Hi pot AUX1 ground motor ground motor leads and motor soft start ground High vibration gr Inose Check internal connections connections WARNING This is a serious fault condition Ensure that the fault condition is cleared on the load side Trip AUX1 before attempting to restart the motor Load shorted Remove power and repair Faulty main circuit board Replace the main circuit board Page 74 DXT Digital Solid State Starter User Manual 39 1250A 7 1 Failure Analysis Continued Problem CPU LCD Display LED Jay Possible Cause Solutions Remove Power locate and Control circuit fuses Short in Control Circuit remove the short blow after control None None power is applied Apply the correct voltage to the Wrong Control Voltage control circuit No Control Voltage applied to Control Apply control voltage to control board Board Control Power Remove power and replace the Transformer failure or power transformer or the CPT CPT Fuse failure fuse Start Circuit Wired Remove power and correct the Incorrectly start circuit wiring Motor will not start Trip AUXI No Start Command Apply the start command No 3 Phase Line Apply 3 phase line voltage to Voltage the unit Remove power and Test Shorted SCR in Starter SCR s Refer to Sec 7 1 1 for the testing procedure Faulty Control Logic 2 and repaints
15. SP8 1 Basic Run Overload Curve Run Curve Locked Rotor Time Set the locked rotor time to the OL Class default chosen in Setpoint Page 1 or set the time in seconds This is the time the locked rotor condition exists before a trip occurs Run Locked Rotor Current The current the motor draws with full voltage on the windings and no rotor movement as a percent of motor FLA Refer to the nameplate data or contact the motor manufacturer Coast Down Timer If enabled this prevents the motor from restarting for the programmed amount of time after a stop command is given PAGE 8 MENU OVERLOAD CURVE AERON 5 CONFIGURATION TIMES RUN CURVE LOCKED RUN LOCKED ROTOR ROTOR TIME CLASS CURRENT 600 FLA BASIC RUN Range 1 30 SEC 400 800 OVERLOAD CURVE O L Class Increments of 1 Increments of 1 x COAST DOWN TIMER TIME DISABLED Range 1 60 MIN DISABLED Increments of 1 START CURVE LOCKED START LOCKED ROTOR ROTOR TIME O L CLASS CURRENT 600 FLA Range 1 30 SEC Range 400 800 O L Class Increments of 1 Increments of 10 ACCELERATION TIME Y LIMIT 30 SEC Range 1 300 SEC BASIC RUN DISABLED OVERLOAD CURVE Increments of 1 NUMBER OF STARTS HOUR DISABLED Range 1 6 DISABLED Increments of TIME BETWEEN STARTS TIME 5 MIN Range 1
16. POWER FACTOR NON STATOR TRIPS TRIPS Screen 9 1 Screen 20 t G F HISET TRIPS poca G F LOSET TRIPS TRIPS Screen 10 Screen 21 ACCELERATION TIME TRIPS EDU Screen 11 7 Screen 22 Y START UNDER CURVE EXT INP 1 TRIPS Screen 12 1 Screen 23 1 START OVER CURVE EXT INP 2 TRIPS Screen 13 Screen 24 T START CURVE EXT INP 3 TRIPS Screen 14 Screen 25 LEARNED START CURVE EXT INP 4 f TRIPS Screen 15 FAIL SHUNT TRIP TRIPS LL Screen 26 1 PRESS ENTER TO CLEAR STATISTICS LEVEL 2 Password required Page 72 DXT Digital Solid State Starter User Manual 39 1250A Chapter 7 Maintenance and Troubleshooting The DXT Series is designed to be a maintenance free product However as with all electronic equipment the unit should be checked periodically for build up of dirt moisture or industrial contaminants These can cause arc over carbon tracking or prevent proper cooling of the SCR heat sinks All bolts should be checked annually for proper tightness using an accurate torque wrench Note If the unit is installed in a contaminated environment and forced air cooling is used blower filters must be checked and cleaned regularly to insure proper air flow and cooling of the enclosure 7 1 Failure Analysis When a fault occurs the LCD will displa
17. e Decel Mode Retains all protection features of the Run Mode At the end of Decel the motor will be stopped and the protection features change as indicated below e Coast To Stop Mode Power is immediately removed from the motor and the DXT Series returns to the Ready Mode e Additional protection features activated when the stop command is given include Coast Down Back Spin Timer o Starts per Hour o Time between Starts o External Input Faults 1 6 Thermal Overload Protection The DXT Series plays an important role in the protection of your motor in that it monitors the motor for excessive thermal conditions due to starting running and ambient conditions The DXT Series has a Dynamic Thermal Register system in the CPU that provides a mathematical representation of the thermal condition of the motor This thermal information is retained in memory and is monitored for excesses in both value and rate of change Inputs are derived from current values imbalances and optional RTD measurements making it dynamic to all processes involving the motor The DXT Series monitors these conditions separately during the Start and Run modes to provide proper thermal protection at all times 1 6 1 Start Mode overload protection is selectable using one of three methods e Basic Protection 2 data is accumulated and plotted based on an Overload Curve selected in programming This is programmed per NEMA Class 5 30 standard curves and is ba
18. Increasing the ramp time softens the start process by gradually increasing the voltage current or power Ideally the ramp time should be set for the longest amount of time the application will allow without stalling the motor Some applications require a short ramp time due to the mechanics of the system i e centrifugal pumps because pump problems can occur due to insufficient torque Current Limit Sets the maximum motor current the starter will allow during the acceleration As the motor begins to ramp the Current Limit feature sets a maximum at which the current draw is held Current Limit remains in effect until the following occurs 1 The motor reaches full speed Detected by the At Speed detection circuit or 2 The Overload Protection trips on Motor Thermal Overload Once the motor reaches full speed the Current Limit feature becomes inactive In the Voltage Ramp Profile the voltage output is increased until it reaches the Current Limit Ramp time is the maximum amount of time it takes for the voltage to increase until the Current Limit setting takes over The Current Ramp profile varies the output voltage to provide a linear increase in current up to the Maximum Current Setpoint value A closed loop feedback of motor current maintains the Current Ramp profile Motortronics Inc Page 38 DXT Digital Solid State Starter User Manual 39 1250A SP2 4 Start Ramp 2 Type Please refer to Ramp 1 settings for Ramp 2 Type Voltage sel
19. RTD DESCRIPTION STATOR STATOR 2 STATOR B1 STATOR B2 STATOR C1 STATOR C2 FRONT BEARING BACK BEARING BEARING BOX AMBIENT NONE Motortronics Inc Page 56 DXT Digital Solid State Starter User Manual 39 1250A SP 9 RTD Option Configuration Setpoint Page 9 Security Level 3 Continued MENU DOWN ARROW 8 TIMES RANGES Page 9 120 OHM NICKEL NI RTD CONFIGURATION 100 OFIM NICKEL NI Options ENABLED 10 OHM COPPER CU or DISABLED 100 OHM PLATINUM PT OFF it OF RTD S USED E FOR STATOR 4 OFF or 0 240C 32 464F Example F Ranger 0 6 E Increments of 1 ERREUR oi STATOR A1 STATOR A2 STATOR B1 STATOR B2 STATOR C1 STATOR C2 FRONT BEARING BACK BEARING BEARING BOX RTD VOTING AMBIENT NONE DISABLED Options ENABLED 4 or DISABLED 4 STATOR PHAS 1 TYPE gt RTD 1 DESCRIPTION T STATOR PHAS A1 ALRM STATOR PHAS 1 OFF STATOR PHAS 1 LEVEL OFF TRIP LEVEL OFF Range STATOR PHAS 2 les RTD 2 DESCRIPTION STATOR PHAS 2 les STATOR PHAS A2 OFF STATOR PHAS A2 ALRM LEVEL OFF TRIP LEVEL OFF Range 1 Range Range Range STATOR PHAS B1 TYPE m RTD 3 DESCRIPTION PR STATOR PHAS B1 gt STATOR PHAS B1 OFF STATOR PHAS B1 ALRM LEVEL OFF TRIP LEVEL OF
20. SP 7 Custom Acceleration Curve A Mor Setpoint Page 7 Security Level 3 MENU Range 0 100 Increments of 1 7 SP7 1 Setpoint Page 7 allows the user to CURVE A RAMP custom design the acceleration curve start DOWN TIME 1 2 SEC curve to the specific application The user can Range 1 60 SEC custom design up to three different curves in Bez Uncrements of 1 the DXT Only one curve can be active Cision Acceleration CINE CURVE A VOLTAGE enabled at a time Each of the three curves 7 LEVEL 2 30 allow for eight voltage plotting points with Range 0 100 corresponding ramp times and a current limit CUSTOM CURVE setting DISABLED CURVE A RAMP Note Each successive voltage level must be SERVE Flanges 20 EC Increments of 1 programmed to a voltage level equal to or greater than the previous level All eight voltage CURVE A VOLTAGE levels must be programmed and the eighth level has been preset at 100 Increments of 1 CURVE A RAMP If Custom Accel Curve has been set to curve TIME 3 2 SEC A B or C on this page the DXT will override Range 1 60 SEC the Start Control Mode selected in Setpoint lt Wncremenfsof Page 2 even if Start Control in Setpoint CURVE A VOLTAGE Page 2 has not been set to Custom Accel LEVEL 4 45 Curve C
21. AEAEE e ELE 1 600V Phase Insensitivity Unit operates with any phase sequence Transient Voltage Protection RC snubber dv dt networks on each phase Shunt rated contactor included as standard in all NEMA 12 enclosed units 92A and Bypass Contactor above Also standard with all NEMA 12 combination starters Line start rated contactor available as an option Enclosed units 0 to 40 C 32 to 104 F Ambient Condition Design 5 95 relative humidity 0 3300 ft 1000m above sea level without derating Control 2 or 3 wire 120VAC Customer supplied Type Rating Form C SPDT rated 5 Amps 240VAC max 1200VA Auxiliary Contacts 4 Programmable Relays Approvals UL amp Canadian UL cUL Motortronics Page 4 DXT Digital Solid State Starter User Manual 39 1250A Specifications Continued ADVANCED MOTOR PROTECTION Two Stage Electronic Starting Programmable for Class 5 through 30 Overload Curves Runing Programmable for Class 5 through 30 Overload Reset Manual default or Remote Overload circuit retains thermal condition of the motor regardless of control power status Unit uses real time clock to adjust for off time Overload will not reset until thermal capacity available in the motor is sufficient for Retentive Thermal Memory Dynamic Reset Capacity a successful restart Starter learns and retains this information by monitoring previous successful starts Phase Cu
22. AUX1 4 are Factory Set Care should be exercised if any relay assignments or functions are revised Unless absolutely necessary they should not be changed SP4 1 The following is a list of all the user programmable functions Note The Relay Assignments are factory defaults and should not be changed RELAY ASSIGNMENTS FUNCTIONS Default Setting 1St O L Trip TRIP ONLY Trip TRIP AUX1 S C Trip TRIP ONLY Overcurrent Trip TRIP AUX1 Stator RTD Trip TRIP AUX1 Non Stator RTD Trip TRIP AUX1 G F Hi Set Trip TRIP AUX1 G F Lo Set Trip TRIP AUX1 Phase Loss Trip TRIP AUX1 Accel Time Trip TRIP ONLY Start Curve Trip TRIP ONLY Over Frequency Trip TRIP AUX1 Under Frequency Trip TRIP AUX1 I I T Start Curve TRIP AUX1 Learned Start Curve TRIP AUX1 Phase Reversal TRIP AUX1 Overvoltage Trip TRIP AUX1 Undervoltage Trip TRIP AUX1 Power Factor Trip TRIP AUX1 Tach Accel Trip TRIP AUX1 Inhibits Trip TRIP AUX1 Shunt Trip AUX3 Bypass Discrepancy TRIP AUX1 Low Control Voltage TRIP AUX1 External Input 1 NONE External Input 2 NONE Dual Ramp NONE Thermostat TRIP AUX1 O L Warning ALARM AUX2 Overcurrent Alarm ALARM AUX2 Ground Fault Alarm Under Current Alarm ALARM AUX2 ALARM AUX2 Motor Running AUXS Alarm ALARM AUX2 Stator RTD Alarm ALARM AUX2 Non Stator RTD
23. Load Loss Undervoltage or Any Trip Lockout Display Coast Down Time Starts Per Hour Time Between Starts and Any Lockout Kick Start Settings Fault Display EVENT HISTORY Data includes cause of event time date voltage power factor and current for each phase and ground fault current at time of event Up to 60 Events Motortronics Page 5 DXT Digital Solid State Starter User Manual 39 1250A Specifications Continued METERING FUNCTIONS Motor Load Percent of FLA Current Data A B C Phase Current Avg Current Ground Fault Thermal Data Remaining thermal register thermal capacity to start Avg Start Time Avg Start Current Measured Capacity to start time since last start RTD Data Option Temperature readings from up to 12 RTDs 6 stator RTDs Voltage Metering kW PF KWH Start Data SERIAL COMMUNICATIONS Protocol Modbus RTU Signal RS 485 RS 422 or 5232 Network Up to 247 devices per mode Functionality Full operation status view and programming via communications port OPERATOR INTERFACE LCD Readout Alpha numeric LCD display Keypad 8 function keys with tactile feedback Status Indicators 12 LEDs include Power Run Alarm Trip 4 Aux Relays Remote Mount Capability Up to 1000 feet from chassis Use twisted shielded wire amp power source CLOCK and MEMORY Operating Memory
24. Range 50 100 of Motor Stator Max Temp Increments of 1 v MOTOR STATOR MAX TEMPERATURE INS CLS Range Insulation Class A 10 240 Jncrements of 1 pP INPUT TO THERMAL REGISTER ENABLED Option Enabled or m Disabled USE CALCULATED K OR ASSIGN 7 Range 1 50 ON D Range 1 20 SEC Increments of 1 Page 60 DXT Digital Solid State Starter User Manual 39 1250A SP 13 Calibration amp Service Setpoint Page 13 Security Level 3 Certain screens are displayed for user information only such as Current date and time Model number and Firmware revision number Setpoint changes in this page will only be accessible to factory personnel SP13 1 Set Date and Time Displays the date and time Enter Date DDMMYYYY Allows the factory personnel to program the date for the DXT Series in the format shown e Enter Time HH MM Allows the factory personnel to program the time for the DXT Series SP13 2 Model amp Firmware Displays the model number and firmware revision in the DXT Series SP13 3 Press Enter to Access Factory Settings Available to qualified personnel MENU i DOWN ARROW 12 TIMES amp SET DATE AND TIME ENTER DATE DDMMYYYY ENTER TIME hh mm HEHEHHE HHHH HEHEHEHEH HAR SERVICE Range D 1 31 M 1 12 Range H 00 23 Y 1970 2069 M 0 59
25. When the pump is turned off the Output Pressure rapidly drops to zero and the Head Pressure takes over to send the fluid back down the hill A Check Valve is used somewhere in the system to prevent this if necessary by only allowing the liquid to flow in one direction The kinetic energy in that moving fluid is suddenly trapped when the valve slams closed Since fluids can t compress that energy is transformed into a Shock Wave that travels through the piping system looking for an outlet in which it dissipates The sound of that shock wave is referred to as Water Hammer The energy that shock wave be extremely damaging to pipes fittings flanges seals and mounting systems By using the Soft Stop Deceleration feature of the DXT the pump output torque is gradually and gently reduced which slowly reduces the pressure in the pipe When the Output Pressure is just slightly lower than the Head Pressure the flow slowly reverses and closes the Check Valve By this time there is very little energy left in the moving fluid and the Shock Wave is avoided When the output voltage to the motor is low enough to no longer be needed the DXT will end the Decel cycle and turn itself off Another common application for decel control is on material handling conveyors as a means to prevent sudden stops that may cause products to fall over or to bump into one another In overhead crane applications soft stopping of the Bridge or Trolley can prev
26. maximizes the effective application of motor torque within the limits of the motor In this mode Setpoint RAMP TIME 1 is set to minimum so that the output current jumps to the current limit setting immediately Typically used with a limited power supply when starting a difficult load such as a centrifuge or a deep well pump when the motor capacity is barely adequate stall condition or overloading occurs or if other starting modes fail Since ramp times are set to minimum START RAMP 1 TYPE is set to either VOLTAGE or CURRENT Initial Torque Initial Voltage 1 or Initial Current 1 Sets the initial start point of either Voltage Ramp or the Current Ramp Every load requires some amount of torque to start from a standstill It is inefficient to begin ramping the motor from zero every time since between zero and the WK2 break away torque level no work is being performed The initial torque level should be set to provide enough torque to start rotating the motor shaft enabling a Soft Start and preventing torque shock damage Setting this start point too high will not damage the starter but may reduce or eliminate the soft start effect Ramp Time 1 Sets the maximum allowable time for ramping the initial voltage current torque or power setting to either of the following e The Current Limit setting when the motor is still accelerating e Full output voltage if the Current Limit is set to maximum e Maximum kW if Power Ramp is selected
27. 1 0 30 0 sec Undervoltage Trip Level 15 5 30 Off SP3 14 Undervoltage Trip Delay 2 0 sec 1 0 30 0 sec Line Frequency Trip Window Disabled 0 6 Hz Disabled SP3 15 Line Frequency Trip Delay 1 0 sec 1 0 20 0 sec P F Lead Alarm Off 0 1 1 00 Off SP3 16 P F Lead Alarm Delay 1 0 sec 1 120 sec P F Lead Trip Off 01 1 00 Off SP3 17 P F Lead Trip Delay 1 0 sec 1 120 sec P F Lag Alarm Off 01 1 00 Off SP3 18 P F Lag Alarm Delay 1 0 sec 1 120 sec P F Lag Trip Off 01 1 00 Off SP3 19 P F Lag Trip Delay 1 0 sec 1 120 sec Power Demand Period 10 min 1 60 min KW Demand Alarm Pickup Off KW Off 1 100000 KVA Demand Alarm Pickup Off KVA Off 1 100000 SP3 20 KVAR Demand Alarm Pickup Off KVAR Off 1 100000 Amps Demand Alarm Pickup Off Amps Off 1 100000 Ground fault option must be installed Motortronics Inc Page 28 DXT Digital Solid State Starter User Manual 39 1250A 5 1 4 Relay Assignments Setpoint Page 4 Setpoint Security Page Section Page 4 Relay Assignments Level 2 Password Protected Description O L Trip TRIP ONLY Trip TRIP AUX1 S C Trip TRIP ONLY Overcurrent Trip TRIP AUX1 Stator RTD Trip TRIP AUX1 Non Stator RTD Trip TRIP AUX1 G F Hi Set Trip TRIP AUX1 G F Lo Set Trip TRIP AUX1 Phase Loss Trip TRIP AUX1 Accel Time Trip TRIP ONLY Start Curve Trip TRIP ONLY Over
28. 140 AMPS MOTOR FULL LOAD AMPS Push Twice 140 AMPS ENTER Save Entry MOTOR FULL LOAD AMP 142 AMPS MOTOR FULL LOAD AMP 142 AMPS Motortronics Inc Page 26 DXT Digital Solid State Starter User Manual 39 1250A Chapter 5 Setpoint Programming The DXT Series has thirteen programmable Setpoint pages which define the motor data ramp curves protection I O configuration and communications In Section 5 1 the Setpoint pages are outlined in chart form In Section 5 2 the Setpoint pages are illustrated and defined for easy navigation and programming Note Setpoints can only be changed when the starter is in the Ready Mode Also the soft start will not start when it is in programming mode 5 1 Setpoints Page List These charts list the Setpoint Page programmable functions and the section See 5 2 Setpoints menu 5 1 1 Basic Configuration Setpoint Page1 Setpoint Security Factory Setting Page Level Description Default Range Section m n 5 Motor Full Load Amps FLA Model dependent 2 SP1 1 3 Service Factor 1 15 1 00 1 3 SP1 2 E 8925 Overload Class 10 O L Class 5 30 SP1 3 58 888 NEMA Design B A F SP1 4 9 g Insulation Class B A B C E F H K N S SP1 5 8 Line Voltage 480 208 to 600 SP1 6 Line Frequency 60 50 or 60 HZ SP1 7 5 1 2 Starter Configuration Setpoint Page 2 Setpoint Security Factory Sett
29. 22 Ext Inp 3 Trips 23 Ext Inp 4 Trips 24 Press ENTER to Clear Statistics 25 Motortronics Inc Page 64 DXT Digital Solid State Starter User Manual 39 1250A 6 2 Metering Menu and Explanation Push MENU key to toggle the screens between Setpoint Menu and Metering Menu and follow the arrow keys to get to different screens MENU METERING PAGE 1 CURRENT METERED DATA METERING PAGE 2 VOLTAGE amp POWER DATA METERING PAGE 3 RTD VALUES METERING PAGE 4 STATUS METERING PAGE 5 EVENT RECORDER METERING PAGE 6 LAST TRIP METERING PAGE 7 STATISTICS Motortronics Inc Page 65 DXT Digital Solid State Starter User Manual 39 1250A MP 1 Metering Metering Page 1 Displays basic current metering data MENU Y METERING PAGE 1 CURRENT METERED DATA THHEHHEYB G F THHEHE I AVG RPM MOTOR LOAD OF FLA FLA LINE FREQUENCY PHASE ORDER THERMAL REGISTER REMAINING THERMAL CAPACITY START AVERAGE START TIME TIME SECS AVG START CURENT LIBHEHEE AMPS TO START ZHEHHHEHE i LAST START TIME SEC Motortr
30. Alarm RTD Failure Alarm ALARM AUX2 ALARM AUX2 Self Test Fail TRIP AUX 1 Thermal Register ALARM AUX2 U V Alarm ALARM AUX2 O V Alarm ALARM AUX2 Power Factor Alarm ALARM AUX2 KW Demand Alarm ALARM AUX2 KVA Demand Alarm ALARM AUX2 KVAR Demand Alarm ALARM AUX2 Amps Demand Alarm ALARM AUX2 Timed Output NONE Run Delay Time NONE At Speed AUX4 Ground fault option must be installed Motortronics Inc Page 45 DXT Digital Solid State Starter User Manual 39 1250A SP 5 Relay Configuration Setpoint Page 5 Security Level 2 In Setpoint Page 5 the user can configure the four output relays as either fail safe or non fail safe and latching or non latching SP5 1 When a relay has been configured for Fail Safe and power is applied to the unit the relay will energize and its contacts will change state The relay will then de energize and its contacts revert back when an event occurs of if power is removed NOTE The relays in the DXT Series will not prevent a start sequence unless they are wired in as interlocks If power is lost the motor power is also lost Care should be exercised if any relay assignments or functions are revised Unless absolutely necessary they should not be changed SP5 2 A relay configured as non latching will reset itself when the cause of the trip event is not continuous The TRIP AUX1 relay should always be programmed for latc
31. C current values Ground Fault Option at time of trip 1A PAGE 5 Event Recorder Displays Vab Vbc Vca and Power Factor at time of trip 1B 6 1 6 Last Trip Metering Page 6 Description of Display Screen Cause of last trip 1 2 Measured phase current 2 Measured voltage and power factor 3 lt Imbalance percentage the frequency and the kW 4 ad Hottest stator RTD temperature 5 Hottest non stator RTD temperature 6 Motortronics Inc Page 63 DXT Digital Solid State Starter User Manual 39 1250A 6 1 7 Statistics Metering Page 7 d Description of Display Screen Total Megawatt Hours 1 Accumulated Total Running Hours 2 Clear the Total Running Hour Count 3 Total Number of Trips Number of Short CircuitTrips 4 Number of Start and Run Overload Trips since the last statistical data clearing 5 Number of frequency and Current Imbalance trips 6 Number of Over Current Trips 7 Stator and Non Stator RTD Trips 8 Ground Fault Hiset and Loset Trips 9 Acceleration Time Trips 10 n Start Curve Trips 11 2 ur Start Curve Trips 12 o2 Learned Start Curve Trips 13 a Shunt Trip Trips 14 Phase Loss Trips 15 Tach Acceleration Trips 16 Undervoltage and Overvoltage Trips 17 Power Factor Trips 18 Phase Reversal Trips 19 Low Control Voltage Trips 20 Ext Inp 1 Trips 21 Ext Inp 2 Trips
32. Description STATOR PHAS B2 User defined Up to 15 Characters Stator Phase B2 Alarm Level Off 0 240C 32 464F Off Stator Phase B2 Trip Level Off 0 240C 32 464F Off Stator Phase C1 Type Off Same as Stator Phase A1 RTD 5 Description STATOR PHAS C1 User defined Up to 15 Characters Stator Phase C1 Alarm Level Off 0 240C 32 464F Off Stator Phase C1 Trip Level Off 0 240C 32 464F Off Stator Phase C2 Type Off Same as Stator Phase A1 RTD 6 Description STATOR PHAS C2 User defined Up to 15 Characters Stator Phase C2 Alarm Level Off 0 240C 32 464F Off Stator Phase C2 Trip Level Off 0 240C 32 464F Off SP9 4 End Bearing Type Off Same as Stator A1 RTD 7 Description END BEARING User defined Up to 15 Characters End Bearing Alarm Level Off 0 240C 32 464F Off End Bearing Trip Level Off 0 240C 32 464F Off Shaft Bearing Type Off Same as Stator Phase A1 RTD 8 Description SHAFT BEARING User defined Up to 15 Characters Shaft Bearing Alarm Level Off 0 240C 32 464F Off Shaft Bearing Trip Level Off 0 240C 32 464F Off RTD 9 Type Off Same as Stator Phase A1 RTD 9 Description User defined Up to 15 Characters RTD 9 Alarm Level Off 0 240C 32 464F Off RTD 9 Trip Level Off 0 240C 32 464F Off RTD 10 Type Off Same as Stator Phase A1 RTD 10 Description User defined Up to 15 Characters RTD 10 Alarm Level Off 0 240C 32 464F Off RTD 10 Trip Level Off 0 240C 32 464F Off RTD 11 Type Off Same as Stator Phase A1 RTD 11 Descript
33. Frequency Trip TRIP AUX1 Under Frequency Trip TRIP AUX1 Start Curve TRIP AUX1 Learned Start Curve TRIP AUX1 Phase Reversal TRIP AUX1 Overvoltage Trip TRIP AUX1 Undervoltage Trip TRIP AUX1 Power Factor Trip TRIP AUX1 Tach Accel Trip TRIP AUX1 Inhibits Trip TRIP AUX1 Shunt Trip AUX3 Bypass Discrepancy TRIP AUX1 Low Control Voltage TRIP AUX1 External Input 1 NONE External Input 2 NONE Dual Ramp NONE Thermostat TRIP AUX1 O L Warning ALARM AUX2 Overcurrent Alarm ALARM AUX2 Ground Fault Alarm ALARM AUX2 Under Current Alarm ALARM AUX2 Motor Running AUX3 Alarm ALARM AUX2 Stator RTD Alarm ALARM AUX2 Non Stator RTD Alarm ALARM AUX2 RTD Failure Alarm ALARM AUX2 Self Test Fail TRIP AUX 1 Thermal Register ALARM AUX2 U V Alarm ALARM AUX2 ON Alarm ALARM AUX2 Power Factor Alarm KW Demand Alarm ALARM AUX2 KVA Demand Alarm ALARM AUX2 KVAR Demand Alarm ALARM AUX2 ALARM AUX2 Amps Demand Alarm ALARM AUX2 Timed Output NONE Run Delay Time NONE At Speed AUX4 NONE TRIP AUX1 TRIP ONLY ALARM AUX2 AUX3 AUX4 SP4 1 Ground fault option must be installed Motortronics Inc Page 29 DXT Digital Solid State Starter User Manual 39 1250A 5 1 5 Relay Configuration Setpoint Page 5
34. Increments of 1 Increments of 1 A MODEL FIRMWARE REV HHHHH PRESS ENTER TO ACCESS FACTORY SETTINGS Motortronics Inc Page 61 DXT Digital Solid State Starter User Manual 39 1250A Chapter 6 Metering Pages The DXT Series offers performance metering which gives the user the ability to view information about the motor and the unit 6 1 Metering Page List The following charts list each Metering Page and the functions within that page The applicable section of the manual is also referenced 6 1 1 Metering Menu amp Data Metering Page 1 Ed Description of Display Screen m Phase A B C and Ground Fault Option 1 Average current of the of imbalance and the motor s RPM Tach Option 2 Motor load as percentage of motor FLA 3 3 Line frequency and present phase sequence 4 Percentage of remaining Thermal Register 5 Thermal capacity required to start the motor 6 2 Average time required to start 7 5 Average current during start 8 Measured 12 required to start the motor 9 Amount of time required to start the motor during the last successful start 10 6 1 2 Metering Metering Page 2 iid Description of Display Screen Phase A B C currents and Power Factor 1 Phase A B C currents and Ground Fault Option 2 Displays KW and KVA 3 Displays KV
35. NUMBER OF STARTS 6 ALLOWABLE STARTS WITH DECEL CYCLE PER HOUR 3 Motortronics Page 22 DXT Digital Solid State Starter User Manual 39 1250A 3 5 Sequence of Normal Operation e Apply control power and check that the Power LED comes on Display 1 ER DA ART e Apply three phase power to the unit The motor should run only when the start command is applied e Apply the start command Display 2 The RUN LED will be lit Display 3 2 MOTOR STARTING e The AUX3 LEDs will be lit If the motor does not enter run mode in the set 00 X FLA time a trip will occur POWER RUN AUX3 LEDs will be lit indicating that the contact has energized IA IB IC will display the current setting for Phase A Phase B and Phase C and the G F indicates ground fault Display 4 TIME TO TRIP XXX SECS e When the motor reaches full speed the AUX4 LED At Speed will be lit e the motor decelerates or stops during the acceleration period hit the stop button immediately and open the disconnect line If the unit does not follow this operational sequence please refer to the Troubleshooting Chapter IC G F It is best to operate the motor at its full load starting condition to achieve the proper time torque and ramp settings Initial settings are set to accommodate most motor conditions TRY INITIAL SETTINGS FIRST See Setpoint Page 2 Sect 5 1 2 to make any adjustments e Initial Voltage Sta
36. Page 11 Communications Page 12 System Setpoints Y Page 13 Calibration amp Service FACTORY LEVEL DXT Digital Solid State Starter User Manual 39 1250A 4 2 1 Password Access Screens in Level 1 of the set point menu can be changed without password access because they list basic motor information Screens in Levels 2 and 3 require passwords because they provide more in depth protection and control of the unit The password in Levels 2 and 3 can be changed set by the user Note Set Points can only be changed when the motor is in Stop Ready Mode The DXT Series will not allowa Start if it is still in the Edit Mode When the unit is in the Edit Mode an asterisk is displayed in the top right corner screen 4 2 2 Changing Set Points Example 1 Changing Motor FLA from 140 AMPS to 142 AMPS 1 Press MENU button to display Set point Page 1 Basic Configuration 2 Press the RIGHT ARROW you will view the screen Motor Full Load Amps 3 Press the ENTER button for edit mode Note The asterisk in the top right corner of the LCD screen that indicates Edit Mode To change the value select the UP ARROW or DOWN ARROW In this case push the UP ARROW twice 2x To accept the new value press the ENTER button The unit will accept the changes and will leave the edit mode Note the is no longer in the top right corner of the LCD Display PAGE 1 BASIC MOTOR FULL LOAD AMPS CONFIGURATION
37. Page List 27 Setpoint Menu amp Parameter 27 Explanation Setpoint Page 1 Displays 27 Basic Configuration Overload Class Trip Curves 35 Setpoint Page 2 Displays 27 Starter Configuration Jog Voltage Ramp 37 Setpoint Page 3 Displays 28 Phase amp Ground Settings Setpoint Page 4 Displays 29 5 2 Relay Assignment Setpoint Page 5 Displays 30 Relay Configuration Setpoint Page 6 Displays 30 User I O Configuration Setpoint Page 7 Displays 31 Custom Acceleration Curve Setpoint Page 8 Displays 31 Overload Curve Configuration Setpoint Page 9 Displays 32 RTD Option Configuration Setpoint Page 10 Displays 33 Set Password Motortronics Page 7 DXT Digital Solid State Starter User Manual 39 1250A 1 4 Theory of Operation The power of the DXT Series is in the CPU a microprocessor based protection and control system for the motor and starter assembly The CPU uses Phase Angle Firing of the SCRs to apply a reduced voltage to the motor Then slowly and gently increases torque through control of the voltage and current until the motor accelerates to full speed This starting method lowers the starting current of the motor reducing electrical stresses on the power system It also reduces peak starting torque stresses on both the motor and mechanical load components promoting longer service life and less downtime 1 4 1 Acceleration The DXT Series comes stan
38. RTD 9 MAX TEMP SINCE RTD 9 C F CLEAR RTD 9 C A A Screen 21 y Screen 22 y RTD 10 MAX TEMP SINCE RTD 10 C CLEAR RTD 10 C A Screen 23 14 Screen 24 RTD 11 MAX TEMP SINCE RTD 11 C CLEAR RTD 11 A A Screen 25 Y Screen 26 v RTD 12 MAX TEMP SINCE RTD 12 C F CLEAR RTD 12 C A Screen 27 Y PRESS ENTER TO CLEAR MAX TEMP REGS Screen 28 y MEASURED RUN COOL TIME MIN Screen 29 y MEASURED STOPPED COOL TIME MIN Page 68 DXT Digital Solid State Starter User Manual 39 1250A MP 4 Metering Metering Page 4 Displays the present status of the soft start Screen 1 Displays the present state of the unit as follows Screen 2 Displays the amount of time remaining before an overload trip will occur Screen 3 Displays the amount of time remaining from a thermal inhibit The inhibit time comes from the amount of thermal register remaining versus the amount of thermal capacity required to start Screen 4 Displays the coast down time remaining Backspin time The time remaining depends upon the user setting in Setpoint Page 8 Coast Down Time Screen 5 Displays the amount of time remaining before a start command can be given The time remaining depends upon the setting in Setpoint page 5 Screen 6 If the number of starts per hour has exceeded the setting in Setpoint page 8 NOTE Screen 1 CURRENT STATUS Screens include
39. SRAM loaded from F RAM at initialization Factory Default Storage Flash EEPROM Customer Seitings and Status Non volatile FRAM no battery backup necessary Real Time Clock Lithium ion battery for RTC only Motortronics Page 6 DXT Digital Solid State Starter User Manual 39 1250A 1 3 Reference chart Page Table or Drawing Number Setpoint Page 11 Displays 33 Communications Setpoint Page 12 Displays 15 System Setpoints id Setpoint Page 13 Displays 33 Calibration amp Service 6 1 Metering Page List 62 Metering Menu 62 Metering Page 1 Displays 62 Metering Data Metering Page 2 Displays 62 Metering Metering Page 3 Displays RTD 62 62 Values Metering Page 4 Displays Status 63 Metering Page 5 Displays Event 63 Recorder Metering Page 6 Displays Last 63 Trip Metering Page 7 Displays 64 Statistics 71 Failure Analysis amp Troubleshooting 73 SCR Testing Procedure Table or Drawing Number 1 2 Specifications 4 2 7 Power Connections 14 2 8 Control Connections 14 2 9a Optional RTD Board 16 2 9b Power Board 17 2 9c CPU Board 18 2 9d Communication Board 19 3 3 Acceleration Adjustments 20 3 4 Deceleration Adjustments 21 3 5 Sequence of Operation 23 4 1 Keypad Operator Interface 24 Menu Navigation 25 4 2 Changing Setpoints Example 26 5 1 Setpoints
40. Stop Allows the RS485 Modbus communications to start and stop the motor Contact factory for details 11 SET FRONT BAUD SET MODBUS BAUD MENU DOWN COMMUNICATIONS RATE 9 6 KB SEC RATE 9 6 KB SEC ARROW 10 Range 2 4 4 8 9 6 Range 2 4 4 8 9 6 TIMES Gee ME 19 2 38 4 MODBUS ADDRESS SET ACCESS CODE NUBBER 247 CODE 1 Range 1 247 Range 1 999 Motortronics Inc Increments of 1 Increments of 1 SET LINK BAUD RATE 9 6 KB SEC REMOTE START STOP DISABLED Range 2 4 4 8 9 6 19 2 38 4 KB SEC Option Enabled or Disabled 58 DXT Digital Solid State Starter User Manual 39 1250A SP 12 System Setpoints Setpoint Page 12 Security Level 3 SP12 1 Default Display Screen This Setpoint group allows the user to choose the default screen the DXT Series displays while the motor is running Select the metering page number 1 4 then select the metering screen number The range varies depending on the selected page To display a default screen program the following two Setpoints Metering Data Page Range is Page 1 4 Metering Data Screen If Page 1 is selected as the default page then Screens 1 10 are available If Page 2 Screens 1 29 are available If Page 3 is selected then Screens 1 6 are available See Metering Menu MP 1 for screen number assignment SP12 2 Alarms Confi
41. gt 2 5 FACTORY SET 5 8 Firmware REV Display Only Cannot be changed SP13 2 ora to Access Factory Available to Qualified Factory Personnel SP13 3 Motortronics Inc Page 33 DXT Digital Solid State Starter User Manual 39 1250A 5 2 Setpoints Menu and Parameter Explanation SP1 SP13 SP 1 Basic Configuration Setpoint Page 1 In Setpoint Page 1 is used to setup basic nameplate data of the motor MENU Page 1 Basic Configuration MOTOR FULL LOAD AMPS 100AMPS SERVICE FACTOR 1 15 X FLA OVERLOAD CLASS 10 NEMA DESIGN B INSULATION BLASS B LINE VOLTAGE INPUT 480 VOLTS LINE FREQUENCY HZ 60 Range 1 00 1 3 Increments of 0 01 Range 5 30 Increments of 5 Range A F Range 5 Range 208 600 Model dependent Range 50 or 60 SP1 1 Motor Full Load Amps FLA Allows the user to enter the motor s FLA rating Range of adjustment is 50 100 of units maximum current rating described below SP1 2 Service Factor Sets the pickup point on the overload curve as defined by the programmed motor full load current Ex If the motor FLA is 100 and the service factor is 1 15 the overload pickup point will be 115 Amps Motortronics Inc Page 34 DXT Digital Solid State Starter User Manual 39 1250A SP1 3 Overload Class Choose t
42. must be free of contamination e Locate the centering pin in the bottom and top of the heatsink and center it in the SCR hole making sure that the SCR is oriented in the same direction as the SCR that was removed Locate the centering pin in the top heatsink and center it in the SCR hole Caution If center pin is not placed correctly it will damage the SCR and the heat sink Hand tighten the PEGs evenly per factory specs Once proper force is reached make sure that the SCR pucks are securely held between the heatsinks and aligned evenly e Replace any lugs MOVs snubbers power straps printed circuit boards and associated wiring that were removed in step 4 Use the following chart to verify wiring of J5 J6 and J7 Main Circuit Board Pin Destination Load cathode Output Load Lug _ pne Une Cathode After verifying that all wiring is correctly connected test the SCR and then test the unit Motortronics Inc Page 78 DXT Digital Solid State Starter User Manual 39 1250A 7 4 Replacing the Main Control Board The printed circuit board is not intended to be field repaired If the board is faulty the entire board should be replaced using the following procedure Make sure to observe proper Anti Static control measures when handling printed circuit boards Remove three phase power and control power from the unit and lock out Remove plugs and tag plugs with connector numbers Remove control wires from terminals and tag wir
43. that the undervoltage condition must exist before a trip occurs SP3 15 Line Frequency Trip Window The acceptable amount of drift above or below the programmed line frequency Hz before a trip is generated Line Frequency Trip Delay The amount of time that the frequency drift condition must exist before a trip occurs SP3 16 Power Factor Lead Alarm Typically used to indicate a leading power factor Power Factor Lead Alarm Delay The amount of time that the power factor lead condition must exist before an alarm occurs SP3 17 Power Factor Lead Trip The unacceptable amount of leading power factor required to generate a trip Power Factor Lead Delay The amount of time the leading power factor lead condition must exist before a trip will occur SP3 18 Power Factor Lag Alarm Typically used to indicate an excessively lagging power factor No load condition Power Factor Lag Alarm Delay The amount of time the lagging power factor condition must exist before an alarm occurs SP3 19 Power Factor Lag Trip The unacceptable mount of lagging power factor required to generate a trip Power Factor Lag Delay The amount of time the lagging power factor condition must exist before a trip will occur SP3 20 Power Demand Period The DXT Series monitors the demand of the motor based on several parameters current KW kVA Monitoring the demand of the motor assist in the energy management program where processes can be altered
44. the Ramp Time setting if necessary so use this feature when acceleration time is not critical To set Voltage Ramping with Current Limit select VOLTAGE for the START RAMP 1 Setpoint and set CURRENT LIMIT 1 Setpoint to a desired lower setting as determined by your application requirements Motortronics Inc Page 37 DXT Digital Solid State Starter User Manual 39 1250A Start Ramp 1 Type Current Current Ramping Closed Loop Torque Ramping This method is used for smooth linear increase of output torque This ramp is only used on some conveyor systems long haul or down hill For other applications use Voltage Ramp or a custom Accel curve Output voltage is constantly updated to provide the linear current ramp and therefore the available torque is maximized at any given speed This is for applications where rapid changes in torque may result in load damage or equipment changes Typical applications include overland conveyors if belt stretching occurs fans and mixers if blade warping is a problem and material handling systems if stacked products fall over or break This feature can be used with or without the Maximum Current Limit setting To achieve Current Ramping select CURRENT for START RAMP 1 TYPE Setpoint and set the MAXIMUM CURRENT 1 Setpoint to the desired level Current Limit Only Current Step uses the Current Limit feature exclusively This method of starting eliminates the Soft Start voltage current ramp and instead
45. 1 1ST ALARM AUX2 A v LOW CONTROL VOLTAGE O V ALARM 1ST TRIP ONLY 1ST ALARM AUX2 A EXTERNAL INPUT 1 1ST NONE PHASE LOSS TRIP 1ST TRIP AUX1 POWER FACTOR ALARM 1ST ALARM AUX2 EXTERNAL INPUT 2 KW DEMAND ALARM 1ST ALARM AUX2 ACCEL TIME TRIP 1ST TRIP ONLY KVA DEMAND ALARM 1ST ALARM AUX2 1ST NONE DUAL RAMP 1ST NONE THERMOSTAT 1ST TRIP AUX1 KVAR DEMAND ALARM 1ST ALARM AUX2 1ST NONE AUX1 OVER FREQUENCY TRIP v 1ST TRIP AUX1 UNDER FREQUENCY TRIP O L WARNING 1ST ALARM AMPS DEMAND ALARM 1ST ALARM AUX2 D OVERCURRENT ALARM 1ST ALARM AUX2 TIMED OUTPUT 1ST NONE vv START CURVE 1ST TRIP AUX1 GROUND FAULT ALARM 1ST ALARM AUX2 1ST TRIP AUX1 v LEARNED START CURVE Motortronics Inc UNDERCURRENT ALARM 1ST ALARM AUX2 RUN DELAY TIME 1ST NONE AT SPEED 1ST AUX4 Page 44 DXT Digital Solid State Starter User Manual 39 1250A SP 4 Relay Assignment Setpoint Page 4 Security Level 2 Continued All of the protective functions in DXT Series are user programmable to an output relay The factory will ship with all tripping functions assigned to the TRIP AUX1 relay and all alarm functions to the ALARM AUX2 relay Note
46. 5 30 11 18 5 TES DXT 48 48 10 15 30 40 22 20 DXT 62 62 15 20 40 50 15 30 14 2 DXT 78 78 20 25 50 60 22 37 50 DXT 92 92 25 30 60 75 45 DXT 120 120 30 40 75 100 30 55 ute 50 DXT 150 150 40 50 100 125 45 75 250 kcmil DXT 180 180 50 60 125 150 55 90 BEES 275 DXT 220 220 60 75 150 200 110 DXT 288 288 75 100 200 250 75 182 2 86 50 275 DXT 360 360 100 125 250 300 110 160 DXT 414 414 125 150 300 350 200 2 600kcmil 75 inl DXT 476 476 350 400 132 250 DXT 550 550 150 200 400 500 160 DXT 718 718 200 250 500 600 200 315 DXT 862 862 250 300 600 700 400 3 2 600 kcmil 375 DXT 1006 1006 300 350 700 800 DXT 1150 1150 350 400 800 900 DXT 1200 1200 400 450 900 1000 4 1 0 750kcmil 500 DXT 1250 1250 450 500 1000 1125 Note All wiring must be sized according to NEC standards 2 6 Dimensions 1 1 1 1 DXT DIMENSIONS pe B gt el 1 1 1 Overall Dimensions Mounting Dimensions CHE 1 1 nciosure ode umber A B DXT 39 to DXT 120 16 5 10 10 15 9 9 0 28 DXT 150 to DXT 180 20 20 1 12 18 5 17 5 0 44 DXT 220 to DXT 288 27 201 112 255 17 5 0 44 PANEL DXT 360 to DXT 550 29 5 201 11 5 255 175 0 44 DXT 718 to DXT 1006 45 33 128 43 3 313 044 DXT 1150 to DXT 1250 33 33 152 31 2 812 044 DXT 39 to DXT 120 165 10 10 15 9 9 0 28 DXT 150 to DXT 180 323 243 133 31 3 18 0 44 NEMA DXT 220 10 51 288 38 3 243 133 37 3 18 0 44 DXT 3
47. 50A Chapter 3 Start up CERTAIN THAT PERSONNEL ARE THOROUGHLY TRAINED IN THE APPLICABLE SAFETY WARNING THE DXT UNIT DEALS WITH POTENTIALLY LETHAL VOLTAGE LEVELS YOU MUST BE PRECAUTIONS BEFORE PROCEEDING WITH THIS SECTION 3 1 Preliminary Start Up Check List Please make the following checks before applying power to the unit Supply voltage matches the rated supply voltage of the unit Horsepower current ratings of the motor and unit match or the unit has higher rating Initial ramp time and torque adjustments have been checked Power lines are attached to the unit input terminals marked L1 L2 and L3 Motor leads are connected to the lower terminals marked T1 2 Appropriate control power is applied and or control connections have been made The motor s FLA has been programmed The thermal overload parameters are properly set motor area equipment are clear of people and parts before start up 3 2 Introduction It is best to operate the motor at its full load starting condition to achieve the proper time torque and ramp settings Initial settings are set to accommodate most motor conditions TRY INITIAL SETTINGS FIRST See Setpoint Page 2 to make any adjustments 3 3 Acceleration Adjustments The unit is set at the factory with typical starting characteristics that perform well in most applications When the system is ready to start try the initial unit settings If the
48. 6 Same as Screens 3 4 for RTDs 2 12 Screen 27 Allows the user to clear the maximum temperature register upon entering the setpoint level 3 password Screen 28 Displays the measured run cool time in minutes Screen 29 Displays the measured stopped cool time in minutes Motortronics Inc 1 HOTTEST STATOR RTD C Screen 2 HOTTEST NON STATOR RTD Screen 3 Screen 4 STATOR PHAS RTD 1 C F MAX TEMP SINCE CLEAR RTD 1 Screen 5 1 Screen 6 STATOR PHAS A2 RTD 2 C MAX TEMP SINCE CLEAR 2 C Screen 7 1 Screen 8 STATOR PHAS B1 RTD 3 C MAX TEMP SINCE CLEAR 3 Screen 9 1 Screen 10 STATOR PHAS B2 RTD 4 C F MAX TEMP SINCE CLEAR RTD 4 C A Screen 11 Y Screen 12 1 STATOR PHAS C1 lt gt TEMP SINCE RTD 5 C F CLEAR RTD 5 C A Screen 13 y Screen 14 1 STATOR PHAS C2 MAX TEMP SINCE RTD 6 C CLEAR RTD 6 Screen 15 Y Screen 16 y END BEARING MAX TEMP SINCE RTD 7 F CLEAR RTD 7 C A A Y Screen18 Yvo SHAFT BEARING MAX TEMP SINCE RTD 8 C CLEAR RTD 8 C Screen 19 Y Screen 20 Y
49. 60 MIN DISABLED Increments of 1 AREA UNDER CURVE MAX START PROTECTION DISABLED 368 FLA FLA SEC Options ENABLED or Range 1 2500 FLA Time DISABLED Increments of 1 Jj CURRENT OVER LEARNED START CURVE TIME FOR SAMPLING CURVE DISABLED BIAS 1096 30 SEC Options DISABLED Range 5 4096 Range 400 800 LEARN or ENABLED Increments of 1 Increments of 10 p Motortronics Inc Page 54 DXT Digital Solid State Starter User Manual 39 1250A SP8 2 Basic Start Overload Curve e Start Curve Locked Rotor Time The locked rotor time can be set to the OL Class default chosen in Setpoint Page 1 or to a specific time The overload condition must exist for the programmed amount of time before a trip occurs e Start Locked Rotor Current The current the motor draws with full voltage on the windings and no motor movement as a percent of motor FLA Refer to the motor nameplate data or contact the motor manufacturer Acceleration Time Limit If the motor does not enter run mode reach at speed within the preset time the unit trips on acceleration time limit e Number of Starts per hour If enabled this limits the maximum number of starts permitted per hour This Setpoint allows a maximum of 6 starts per hour Contact the motor manufacturer for further information regarding number of starts per hour e Time Between Starts If enabled the DXT Series prevents another start attempt until the programmed time has expired
50. 60 to DXT 550 44 3 30 3 133 43 3 24 044 DXT 718 to DXT 1006 50 2 363 155 493 30 0 4 RE DXT 1150 to DXT 1250 Contact Factory Contact Factory t NEMA 4 4X DXT 39 to DXT 78 15 7 12 2 10 12 11 0 28 DXT 92 to DXT 120 24 24 129 225 225 0 5 DXT 150 to DXT 288 36 30 16 9 345 285 0 5 12 DXT 360 to DXT 550 48 36 16 9 465 345 0 5 D DXT 718 to DXT 1006 72 1 48 1 20 Floor Mounted 1 DXT 1150 to 1250 Contact Factory Contact Factory 1 1 i 1 1 by 1 1 1 E gt Motortronics Page 13 DXT Digital Solid State Starter User Manual 39 1250A 2 7 Power Connections Connect appropriate power lines to the unit input terminals marked L1 L2 and L3 Avoid routing power wires near the control board Connect the motor leads to the unit terminals marked T1 T2 and T3 Refer to NEC standards for wire length and sizing Never interchange input and output connections to the unit This could cause excessive voltage in the control logic circuit and may damage the unit DXT Series Unit Note Never connect power factor correction capacitors on the load side of the unit The SCRs will be seriously damaged if capacitors are located load side Power Connection The unit must be tested with a motor or other test load connected to the load side of the unit A load bank can be used if a mot
51. A Voltage Level 1 25 0 100 Curve A Ramp Time 1 2 sec 1 60 sec Curve A Voltage Level 2 30 0 100 Curve A Ramp Time 2 2 sec 1 60 sec o Curve A Voltage Level 3 3796 0 100 E 9 Curve A Ramp Time 3 2 sec 1 60 sec 5 Curve A Voltage Level 4 45 0 100 38 3 Curve Ramp Time 4 2 sec 1 60 sec 6 9 85 Curve A Voltage Level 5 55 0 100 E 7 Curve A Ramp Time 5 2 sec 1 60 sec 8 a Curve A Voltage Level 6 67 0 100 6 Curve A Ramp Time 6 2 sec 1 60 sec Curve A Voltage Level 7 82 0 100 Curve A Ramp Time 7 2 sec 1 60 sec Curve A Voltage Level 8 10096 0 100 Curve A Ramp Time 8 2 sec 1 60 sec Custom Curve B m TM Custom Curve 0 SP7 1 5 1 8 Overload Curve Configuration Setpoint Page 8 Setpoint Security Factory Setting Page leval Description Default Section Basic Run Overload Curve Run Curve Locked Rotor Time O L Class 1 30 sec O L Class SPa Run Locked Rotor Current 600 FLA 400 800 Coast Down Timer Disabled 1 60 Min Disabled Basic Start Overload Curve B 8 Start Curve Locked Rotor Time O L Class 1 30 sec O L Class 5 o Start Locked Rotor Current 600 FLA 400 800 oo 5 p Acceleration Time Limit 30 sec 1 300 sec Disabled a a E Number of Starts Per Hour Disabled 1 6 Disabled E 8 Time Between Starts Time 5 min 1 60 Min Disabled Area Under Curve Protection Disabled Enabled or Disabled Max I I T Start 368 1 2500 FLA FLA sec Current Over C
52. AR and Power Factor 4 2 Displays Peak ON and KW Demand 5 95 Displays Peak Demand 6 a 2 Displays Peak KVAR Demand 7 Displays Peak ON and Amps Demand 8 Clears Demand values 9 Displays Megawatt hours used 10 Press enter to clear statistics on MWH values 11 6 1 3 RTD Option Values Metering Page 3 Description of Display Screen Hottest stator RTD 1 6 1 ib Hottest non stator RTD 7 12 2 Temperature of start phase and F 3 S Maximum temperature for RTD 1 4 Io Same as Screens 3 4 for RTDs 2 12 5 26 a Clear the maximum temperature register Level 3 password required 27 Measured running thermal stabilization time of motor in minutes 28 Measured stopped cooling time to ambient of motor in minutes 29 Motortronics Inc Page 62 DXT Digital Solid State Starter User Manual 39 1250A 6 1 4 Status Metering Page 4 d Description of Display Screen Current status 1 St oo Amount of time remaining before an overload trip occurs 2 a Amount of time remaining from a thermal inhibit signal 3 lt Coast down time remaining 4 a Amount of time remaining before a start command can be given 5 Excessive number of starts per hour 6 6 1 5 Event Recorder Metering Page 5 Metering Page Description of Display Screen Displays the event with date and time Up to 60 events 1 Displays Phase A B
53. AUX1 4 Auxiliary relays Note The directional arrow buttons require careful operation In edit mode if the buttons are held for a long period the scrolling speed will increase Motortronics Inc Page 24 DXT Digital Solid State Starter User Manual 39 1250A 4 2 Menu Navigation METERING MENU Page 1 Current Metered Data 2 Voltage amp Power Data Page 3 RTD Values 4 Status 5 Event Recorder 6 Last Trip 7 Statistics Notes 1 The MENU key allows you to toggle the screens between the Setpoint Menu and the Metering Menu Simply use the arrow keys to get to the different screens within each menu Example To access Setpoint Page 3 PHASE amp GROUND SETTINGS press the MENU key once and the DOWN ARROW twice 2 Levels 1 2 and 3 indicate password protection levels for these setpoint pages Motortronics Inc CONFIGURATION MENU Page 1 Basic Configuration 2 Starter Configuration Page 3 Phase amp Ground Settings 4 Relay Assignment Page 5 Relay Configuration Page 6 User I O Configuration 7 Custom Acceleration Curve 8 Overload Curve Config Page 9 RTD Configuration LEVEL3 Page 10 Security Set Password
54. AXIMUM POWER 2 80 FLA Range 0 300 Increments of 10 If Power is selected these screens will appear Page 36 DXT Digital Solid State Starter User Manual 39 1250A SP2 Starter Configuration Setpoint Page 2 Menu Navigation SP2 1 Start Control Mode Dual Ramp Custom Accel Curve Jog Voltage Start Ramp 1 Start Ramp 2 Dual Ramp The dual ramp mode works in conjunction with External Input This allows the user to switch between the two start ramps without having to reconfigure the start mode For details on configuring External Input 3 for DUAL RAMP see Setpoint Page 6 Custom Accel Curve Allows the user to custom design the acceleration start curve to the application See Setpoint page 7 for configuration setup Note If Custom Accel Curve has not been enabled in Setpoint page 7 the DXT Series will ignore the start control mode and read this Setpoint as disabled SP2 2 Jog Voltage The voltage level necessary to cause the motor to slowly rotate SP2 3 Start Ramp 1 Type The ramp type can be setup for either Voltage or Current If Voltage is selected initial voltage ramp time and current limit are adjustable If Current is selected initial current ramp time and maximum current are adjustable Start Ramp 1 Type Voltage Voltage Ramping is the most reliable starting method because the starter will eventually reach an output voltage high enough to draw full current and develop full torque This met
55. F Range 1 Range Range Range STATOR PHAS B2 RTD 4DESCRIPTION _ STATOR PHAS B2 p STATOR PHAS 2 OFF STATOR PHAS B2 ALRM LEVEL OFF TRIP LEVEL OFF Range 1 Range Range Range STATOR PHAS C1 TYPE RID 5 DESCRIPTION STATOR PHAS STATOR PHAS OFF STATOR PHAS C1 ALRM LEVEL OFF TRIP LEVEL OFF Range Range Range Range STATOR PHAS C2 TYPE lt gt RTD 6 DESCRIPTION STATOR PHASE C2 PA STATOR PHAS C2 OFF STATOR PHAS C2 lt gt ALRM LEVEL OFF TRIP LEVEL OFF Range t Range Range Range END BEARING TYPE PN RTD 7 DESCRIPTION PR END BEARING gt END BEARING OFF END BEARING ALRM LEVEL OFF TRIP LEVEL OFF Range 1 Range Range Range RTD 9 TYPE m RTD 9 DESCRIPTION gt 9 ALARM gt 9 TRIP OFF RTD 49 LEVEL OFF LEVEL OFF Range 1 Range Range Range RTD 10 TYPE gt 10 DESCRIPTION 10 ALARM gt RTD 10 TRIP OFF RTD 10 LEVEL OFF LEVEL OFF Range 1 Range Range Range RTD 11 TYPE RTD 11 DESCRIPTION Les RTD 11 ALARM La RTD 11 TRIP OFF RTD 11 LEVEL OFF LEVEL OFF Range 1 Range Range RTD 12 RTD 12 DESCRIPTION RTD 12 ALARM gt RTD 12 TRIP OFF RTD 12 LEVEL OFF LEVEL OFF Range Range Range Range Motortronics Inc Page 57 DXT Digital Solid State Starter User Ma
56. LAG P F ALARM OFF Range 01 1 00 Off Increments of 01 P F LAG ALARM DELAY 1 0 SEC Range 1 120 SEC Increments of 1 POWER FACTOR LAG P F TRIP OFF Range ABC ACB or Disabled POWER DEMAND PERIOD 10 MINUTES Range 1 60 Min Increments of 1 KW DEMAND ALARM PICKUP OFF KW Range Off 1 100000 Increments of 1 KVA DEMAND ALARM PICKUP OFF KVA Range Off 1 100000 Increments of 1 KVAR DEMAND ALARM PICKUP OFF KVAR Range Off 1 100000 Increments of 1 AMPS DEMAND ALARM PICKUP OFF AMPS Range Off 1 100000 Increments of 1 P F LAG TRIP DELAY 1 0 SEC Range 1 120 SEC Increments of 1 Page 42 DXT Digital Solid State Starter User Manual 39 1250A SP3 12 Overvoltage Trip Level Typically used to indicate that the line voltage is too high and at which point a trip occurs Overvoltage Trip Delay The amount of time that the overvoltage condition must exist before a trip will occur SP3 13 Undervoltage Alarm Level Typically used to indicate when the line voltage is too low This is an alarm level Undervoltage Alarm Delay The amount of time that the undervoltage condition must exist before an alarm occurs SP3 14 Undervoltage Trip Level Typically used to indicate that the line voltage is too low at which point a trip occurs Undervoltage Trip Delay The amount of time
57. LAY 2 0 SEC Range 1 0 20 0 SEC Increments of 0 1 Continued Next Page Page 41 DXT Digital Solid State Starter User Manual 39 1250A SP3 6 Phase Loss Trip When enabled the Soft Starter will trip the motor off line upon a loss of phase power Phase Loss Trip Delay The amount of time the phase loss condition must exist before a trip will occur SP3 7 Phase Rotation Detection The DXT Series monitors the phase rotation A trip will occur if it detects a change in the phase rotation Phase Rotation There are two possible phase rotation options ABC or ACB This Setpoint monitors the wiring to ensure that the phase rotation is correct To view the present phase rotation go to Metering Page1 screen number 4 Phase Rotation Trip Delay The amount of time the phase rotation condition must exist before a trip will occur SP3 8 Ground Fault Alarm Typically used to warn of low level ground current leakage Ground Fault Alarm Delay The amount of time that the ground fault condition must exist before an alarm will occur SP3 9 Ground Fault Lo Set Trip Level Typically used to trip the motor on a low level of ground current leakage This Setpoint is intended to detect high impedance faults Ground Fault Lo Set Trip Delay The amount of time that the ground fault condition must exist before a trip will occur Ground Fault Option must be installed SP3 10 Ground Fault Hi Set Trip Level Used to tri
58. ME DELAY 0 SEC Options Enabled See Text f ERE Range 0 60 SEC Disabled or Dual Ramp Options or N C 22 Increments of 1 THERMOSTAT gt EXT INPUT 4 gt THERMOSTAT THERMOSTAT SELECT ENABLED THERMOSTAT TYPE N C TIME DELAY 1 SEC Options Enabled or Disabled See Text for Instructions Options N O or N C Range 0 60 SEC Increments of 1 SP6 5 User Programmable External Inputs The controller provides up to 4 digital external inputs which are individually programmable A description name can be assigned to each individual input for easy identification External Input 1 If used this Setpoint must be enabled alarm Up to 15 characters including spaces can be used to assign the name External Input 1 Type The external input can be set as either a normally open or normally closed contact Name Ext Input 1 The user can assign a description name to the input to easily identify the cause of external trip or External Input 1 Time Delay Upon a change in contact setting the unit will wait the programmed amount of time before generating an output If no delay is needed then input 0 seconds The controller will post an event upon seeing a change in state External Input 2 If used this Setpoint must be enabled alarm Up to 15 characters including spaces can be used to assign the name External Input 2 Type The external input can be set as eith
59. NG Failure to remove both line and control power before starting this procedure may cause personal injury or death e Label the location of wires connected to the SCR e Remove the mounting screws lugs and associated wiring from the existing SCR e sure the surface to which the power module mounts is clean and free from dirt nicks and scratches e Apply thermal grease uniformly along the mounting surface of the SCR Spread the grease thinly 3 mil thick to completely cover the base of the power module and minimize air pockets The grease must be free of contamination e Replace the screws and tighten down firmly All SCR mounting screws should be 44lb in Units with a maximum amperage rating of up to 48A should use 26 for busbar and power lugs Units with a maximum amperage of 60A 120A should use 44 Ibs in for busbar and power lugs e Reconnect all busbars lugs and wires Check to make sure the gate and cathode are wired correctly Use the following chart to verify the wiring of J1 J2 and J3 e After verifying that all wiring is correctly connected test the SCR Destination Load Gate Main Circuit Board Pin Load cathode Output Load Lug Line Cathode BUSBAR CONNECTION CONNECTION Isolated SCR Configuration Motortronics Inc Page 77 DXT Digital Solid State Starter User Manual 39 1250A 7 3 2 Changing a Hockey Puck Type SCR e Remove both line and control power from un
60. NTER ne again will save the revised value to memory and the asterisk will go away indicating the change has been saved When edit mode is not active the ENTER pushbutton will toggle through the event indicator list such as alarms or trips HELP Provides general help information about a specific set point or action Will scroll up through the set point and metering menu page It will scroll to the top of the UP ARROW set point page or a section In edit mode it will increase a set point in an incremental step or toggle through the available options in the set point In the main menu the RIGHT ARROW button provides access to the set point page For RIGHT ARROW set point pages with multiple columns the RIGHT ARROW will scroll the set point page to the right When in edit mode it will shift one character to the right DOWN ARROW Will scroll down through the set point pages and down through the set points In edit mode it will decrement through values and toggle available options in the set point LEFT ARROW Will move to the left through set point pages with multiple columns When in edit mode it will become the backspace key and will shift one character to the left POWER Indicates control power is present RUN Indicates unit motor is running Lights in conjunction with Relay AUX 2 to indicate an Alarm event or warn of possible ALARM gi ha critical condition TRIP Lights in conjunction with Relay AUX 1 to indicate a Trip condition has occurred
61. OM CURVE A RAMP Range 1 60 SEC CURVEA TIME 8 2 SEC Range 1 60 SEC Increments CURVE B VOLTAGE CURVE A CURRENT LEVEL 7 82 LIMIT 35096 FLA CUSTOM e Range 0 on CURVE e Increments of 10 Cont CURVE B RAMP TIME 7 2 SEC CURVE B VOLTAGE Range 1 60 SEC LEVEL 1 25 Increments of 1 Range 0 100 Wnerements of 1_ CURVE VOLTAGE LEVEL 8 100 CURVE B RAMP Range 0 z TIME 1 2 SEC 2 of 1 Range 1 60 SEC Increments of 1 CURVE B CURRENT LIMIT 35096 FLA CURVE B VOLTAGE Range 200 500 LEVEL 2 3096 Increments of 10 Range 0 100 Increments of 1 CURVE C VOLTAGE CURVE B RAMP LEVEL 1 2595 TIME 2 2 SEC Range 0 100 mc j f Range 1 60 SEC Increments of 1 Wneemensofi CURVE C RAMP CURVE VOLTAGE TIME 1 2 SEC LEVEL 3 37 Cae 1 60 SEC CUSTOM Range 0 n Increments of 1 f lt CURVE VOLTAGE CURVE B RAMP LEVEL 2 30 TIME 3 2 SEC Cee 0 100 Eu Range 1 60 SEC CUSTOM Increments of 1 of 1 Increments of 1 E CURVEC CURVE C RAMP CURVE B VOLTAGE TIME 2 2 SEC LEVEL 4 4596 1 60 SEC Range 0 10096 Increments of 1 Increments of 1 CURVE C VOLTAGE CURVE B RAMP LEVEL 3 3796 TIME 4 2 SEC Range 0 100 Range 1 60 SEC Increments of 1 CURVE C RAMP CURVE B VOLTAGE TIME 3 2 SEC LEVEL 5 55 Range 1 60 SEC Increments
62. RTDs instead of the programmed settings This Setpoint should only be enabled when the RTD option is present Thermal Register Minimum Sets the value in the thermal register which represents a motor running at the nameplate current with no overheating or negative sequence currents present Motor Design Ambient Temperature Use the data from the motor manufacturer s specifications When RTD option is supplied this Setpoint will be the base point for the RTD biasing of the Thermal Register Motor Design Run Temperature Use the data from the motor manufacturer s specifications This Setpoint defines the operating temperature rise of the motor at full load amps or 100 load Motor Stator Max Temperature This represents the maximum temperature the stator insulation will withstand The user may choose to use the temperature setting of the insulation class selected in Setpoint Page 1 or enter a specific maximum temperature This value should not exceed the stator s insulation temperature This maximum temperature represents 100 thermal capacity U B Input to Thermal Register Always enabled It allows the DXT Series to use the line current imbalance information to bias the Thermal Register User Calculated K or Assign When the Setpoint is set to ON the DXT Series will calculate the k constant factor for biasing the thermal register or the user may choose to assign the k value Motortronics Inc Page 59 DXT Digital Solid State Starte
63. SP8 3 Area Under Curve Protection If enabled this secondary start protection uses both the basic start protection and the area under the curve protection I I T Start The maximum 2 allowed during start If the 2 to start exceeds this number then the DXT will generate a trip SP8 4 Current Over Curve Learns the motor s starting characteristics and protects the motor based upon the learned curve It is useful when commissioning a new motor e Learn The unit reads the motor s starting characteristics Start the motor and allow it to come to full speed The start feedback enables the motor protection based on the learned start curve e Learned Start Curve Bias The maximum allowed deviation above or below the start curve before a trip is generated e Time for sampling The time the DXT Series continues to sample the start curve characteristic during learn mode Motortronics Inc Page 55 DXT Digital Solid State Starter User Manual 39 1250A SP 9 RTD Option Configuration Setpoint Page 9 Security Level 3 Note The RTD is an option Contact factory for additional information The DXT available with an optional RTD card that provides 12 programmable RTDs which are individually programmable for type The available types are 100 ohm platinum 100 ohm nickel 120 ohm nickel and 10 ohm copper Each RTD can be identified with a description name of up to 15 characters including spacing Also each individual RTD has its own al
64. TPUT 1 gt RMS CURRENT r Range Analog Output Range RPM 0 3600 Hottest Bearing 0 200 C Hottest Stator RTD 0 200 C RMS Current 0 6500A Motor Load 0 1000 KW 0 30000 KW OFF eee of 1 d ANALOG OUTPUT 1 4ma 0 Range 0 65535 X Increments of 1 ANALOG OUTPUT 2 MOTOR LOAD Range See Analog Output 1 Increments of 1 USER PROGRAMMABLE EXTERNAL INPUTS Motortronics Inc Continue on page 50 ANALOG OUTPUT 2 4mA 0 Range 0 65535 Increments of 1 ANALOG OUTPUT 1 4ma 0 20mA 250 Range 0 65535 Increments of 1 ANALOG OUTPUT 2 20mA 1000 Range 0 65535 Increments of 1 Page 47 DXT Digital Solid State Starter User Manual 39 1250A SP 6 User I O Configuration Setpoint Page 6 Security Level 2 Continued The DXT Series can be configured to accept a tachometer feedback signal using the 4 20mA input SP6 1 The first screen of Setpoint page 6 is TACHOMETER SCALE SELECTION When this is set to ENABLED the user will need to input the tachometer scale of the 4 20mA input range e Manual Tach Scale 4 0 mA The unit is looking for an RPM value to assign to the lowest point on the scale This Value should represent the motor at zero speed e Manual Tach Scale 20 0 mA The unit is looking for an RPM value to assign to the highest point on the scale This value should represent the motor at full spee
65. The first one tests the anode to cathode integrity of the SCR by performing the following ohm checks Lead Lead Good Consult factory L1 Lug T1 Lug Greater than 10K ohm Less than 10K ohm Greater than 10K ohm Less than 10K ohm L3 Lug Greater than 10K ohm Less than 10K ohm The second tests the gate to cathode integrity of the SCR The chart below indicates good versus bad readings For wire that is color coded black yellow gray and white Lead Lead Good Bad Black Yellow Between 5 and 90 ohms Lees thans or greater than 90 ohms Less than 5 or greater Grey White Between 5 and 90 ohms than o6colime For wire that is color coded red white red and white White Between 5 and 90 ohms 633 or Oreste than 90 ohms White Between 5 and 90 ohms Less than opgiweter than 90 ohms Note If any of the above readings are out of specifications replace the faulty SCR Note The best way to test an SCR is with an SCR Tester and to look for leakage current less than the manufacturer specified values Motortronics Inc Page 76 DXT Digital Solid State Starter User Manual 39 1250A 7 3 Replacing SCR Devices Two types of SCRs are used in the DXT Series depending on the horsepower amperage rating of the unit Isolated SCRs are used in smaller units and hockey puck type SCRs are used in larger units 7 3 1 Changing an Isolated SCR e Remove both line and control power from unit tag and lock out WARNI
66. USTOM CURVE A Range 0 100 Increments of 1 4 Note Setpoint Page 7 has security level 3 requirement CURVE A RAMP TIME 4 2 SEC Range 1 60 d Increments of 1 CURVE A VOLTAGE LEVEL 5 55 Range 0 100 Increments of 1 CURVE A RAMP Range 1 60 SEC A Increments of 1 CURVE A VOLTAGE LEVEL 6 67 Range 0 100 Increments of 1 CURVE A RAMP 6 2 SEC Range 1 60 SEC A Increments of 1 CURVE VOLTAGE LEVEL 7 82 Range 0 10000 Increments of 1 CURVE A RAMP TIME 7 2 SEC Range 1 60SEC Continued on next page Increments of 1 Motortronics Inc Page 51 DXT Digital Solid State Starter User Manual 39 1250A SP 7 Custom Acceleration Curve Setpoint Page 7 Security Level 3 Continued Continued from Prev page CURVE VOLTAGE CURVE A VOLTAGE LEVEL 6 67 Increments of 1 Range 0 100 Increments of 1 CURVE B RAMP TIME 5 2 SEC Range 1 60 SEC Continued on next page f Range 0 100 LEVEL 8 100 D Range 0 10096 TIME 6 2 SEC CUST
67. arm and trip level SP9 1 Use NEMA Temp for RTD Value When this Setpoint is enabled the DXT will use the NEMA design insulation class to limit the maximum allowed range of the alarm and trip level The maximum allowed temperature range is 240 C 464 F SP9 2 Number Of RTD S Used for Stator Up to six RTDs can be assigned to monitor the stator of the motor SP9 3 RTD Voting When this is enabled the DXT will not post a trip until 2 RTD s have exceeded their programmed trip level This prevents nuisance RTD tripping SP9 4 RTD Setup Each of the 12 RTDs is configured in the following manner The first column is the RTD type the second column is the RTD description the third column is the alarm level and the fourth column is the trip level The first six RTDs have been pre programmed with a description name for the STATOR with two RTDs per phase RTDs 1 amp 2 have been named STATOR PHASE A1 and A2 respectively RTDs 3 amp 4 are named STATOR PHASE B1 and B2 RTDs 5 amp 6 are named STATOR PHASE C1 and C2 If other description names are required press the right arrow button from the RTD Type screen to go the RTD description screen If no alarm or trip level is required these Setpoints can be turned off RTD Available Settings RTD TYPE e 120 OHM NICKEL NI 100 OHM NICKEL NI e 10 OHM COPPER CU e 100 OHM PLATINUM PT e OFF ALARM LEVEL OFF or 0 240C 32 464F Example F Increments of 1
68. arter User Manual 39 1250A 3 4 Deceleration Adjustments Pump Control Decel extends the stopping time on loads that would otherwise stop too quickly if allowed to coast to stop Decel control provides smooth deceleration until the load comes to a stop Three adjustments optimize the deceleration curve to meet the most demanding requirements Try factory settings before adjusting Deceleration Applications The unit is shipped from the factory with the decel feature dis abled Apply power and adjust the soft start before enabling or modifying the deceleration adjustments Both acceleration and deceleration adjustments should be made under normal load conditions The deceleration feature provides a slow decrease in the output voltage accomplishing a gentle decrease in motor torque during the stopping mode This is the OPPOSITE OF BRAKING in that it will take longer to come to a stop than if the starter were just turned off The primary use of this function is to reduce the sudden changes in pressure that are associated with Water Hammer and slamming of check valves with centrifugal pumps Decel control in pump applications is often referred to as Pump Control In a pump system when liquid is being pushed uphill The force exerted by gravity on the column of liquid as it goes up hill is called the Head Pressure in the system The pump is sized to provide enough Output Pressure to overcome the Head Pressure and move the fluid up the pipe
69. bled External Input 1 Type Normally Open Normally Open or Closed Name External Input 1 User Defined up to 15 Characters External Input 1 Delay 1 sec 0 60 sec External Input 2 Select Disabled Enabled or Disabled External Input 2 Type Normally Open Normally Open or Closed External Input 2 Delay 0 sec 0 60 sec Name External Input 2 User Defined up to 15 Characters SP6 5 Dual Ramp Input 3 Select Dual Ramp Enabled Disabled or Dual Ramp Dual Ramp Type Input 3 Normally Open Normally Open or Closed Dual Ramp Time Delay Input 3 0 sec 0 60 sec Name External Input 3 DUAL RAMP User Defined up to 15 Characters Thermostat Input 4 Enabled Enabled or Disabled Thermostat Input 4 Normally Closed Normally Open or Closed Thermostat Time Delay Input 4 1 0 60 sec Thermostat Type Input 4 THERMOSTAT User Defined up to 15 Characters Note Thermostat input 4 is factory wired and set Do Not alter any settings associated with this input Motortronics Inc Page 30 DXT Digital Solid State Starter User Manual 39 1250A 5 1 7 Custom Acceleration Curve Setpoint Page 7 Setpoint Security Factory Setting Section Page Level Default Custom Accel Curve Disabled Disabled Curve A B or C Custom Curve A Curve A Current Limit 350 FLA 200 500 Curve
70. ck Start Control Contact Control Control Control Power Power Power Power Source Return Source Return Two Wire Control Connection Three Wire Control Connection Relay Contacts on Power Board Rated 240 VAC 5A 1200VA Motortronics Page 17 DXT Digital Solid State Starter User Manual 39 1250A 2 9 CPU Board Connections There are eight digital inputs on the CPU board Four of the inputs are user programmable There are also two analog outputs and a tachometer feedback input too t Roc tz Program External External Dual S Tach Analog Analog Enable Input 1 Input 2 Ramp Input Output 1 Output 2 Input 4 20mA 4 20mA 5 NOTE Install program jumper to enable set point programming Jumper must be removed after programming or for prolonged storage to preserve settings Contact factory for remote reset connections Opto isolated Inputs FIG 2 9c CPU Board Motortronics Page 18 DXT Digital Solid State Starter User Manual 39 1250A 2 9d Communication Board Note This Board is mounted on the back of the Keypad Interface A A NC NC Shield A A B B Shield RS485 RCV XMIT Customer Connections RS422 Install jumper X1 to insert termination resistor for last unit Modbus string All other units in the string should have the X1 jumper off Factory Only FIG 2 9d RS485 RS422 Communications Board Motortronics Page 19 DXT Digital Solid State Starter User Manual 39 12
71. crements of 0 1 OVERCURRENT ALARM OVERCURRENT ALARM LEVEL OFF DELAY 2 0 SEC Range 1 0 20 0 SEC Off Increments of 0 1 OVERCURRENT TRIP LEVEL OFF Range 100 300 Off Increments of 1 OVERCURRENT TRIP DELAY 2 0 SEC Range 1 0 20 0 SEC Increments of 0 1 PHASE LOSS TRIP ENABLED gt PHASE LOSS TRIP DELAY 0 1 SEC Options Enabled or Disabled Range 1 0 20 0 SEC Increments of 0 1 PHASE ROTATION DETECTION ABC Range ABC ACB or Disabled lt gt PHASE ROTATION TRIP DELAY 1 0 SEC Range 1 0 20 0 SEC Increments of 0 1 GROUND FAULT ALARM LEVEL OFF CT Range 5 90 Off Increments of 1 GROUND FAULT ALARM DELAY 0 1 SEC Range 1 0 20 0 SEC Increments of 0 1 GROUND FAULT LOSET TRIP LEVEL OFF CT Range 5 90 Off Increments of 1 GROUND FAULT LOSET TRIP DELAY 0 5 SEC Range 1 0 20 0 SEC Increments of 0 1 GROUND FAULT HISET TRIP LEVEL OFF CT lt gt Range 5 90 Off Increments of 1 GROUND FAULT HISET TRIP DELAY 0 008 SEC Range 0 008 0 250 SEC Increments of 0 002 A OVERVOLTAGE ALARM LEVEL OFF lt gt Range 5 30 Off Increments of 1 OVERVOLTAGE ALARM DELAY 1 0 SEC Range 1 0 30 0 SEC Increments of 0 1 OVERVOLTAGE TRIP LEVEL 10 Range 5 30 Off Increments of 1 1 OVERVOLTAGE TRIP DE
72. d SP6 2 Tach Accel Trip Mode Select When enabled the underspeed or overspeed must be selected for the Tach Accel Trip If underspeed is selected only the Tach Underspeed Trip Point will be used If overspeed is selected only the Tach Overspeed Trip Point will be used e Tach Ramp Time This is the duration of time before the starter begins sampling the tachometer e Tach Underspeed Trip Defines the minimum running motor speed using the Tach feedback When the underspeed trip mode is enabled and the motor speed falls below this level for the time specified by the Tach Accel Trip Delay an underspeed trip occurs e Tach Overspeed Trip Defines the maximum allowed motor speed using the Tach feedback When the overspeed trip mode is enabled and the motor speed exceeds this level for the time specified by the Tach Accel Trip Delay an overspeed trip occurs e Tach Accel Trip Delay The duration of time that the Tach Accel trip condition must persist before a trip is generated SP6 3 The controller provides two 4 20mA analog outputs Each analog output is independent of the other and can be assigned to monitor different functions The available output ranges are RPM Hottest Non Stator Bearing RTD Hottest Stator RTD RMS current and Motor Load Analog Output 1 Select a function from the available five options to be transmitted from the 4 20mA output Note If selecting RPM the Tachometer feedback input signal must be present in order f
73. dard with several methods of accelerating the motor which allow it to be programmed to match almost any industrial AC motor application The factory default setting applies a Voltage Ramp with Current Limit as this has been proven the most reliable starting method for the vast majority of applications Using this starting method the Initial Torque setting applies just enough voltage to the motor to cause the motor shaft to begin to turn This voltage is then gradually increased over time as per the Ramp Time setting until one of two things happen the motor accelerates to full speed or the Ramp Time expires and the Current Limit setting is reached If the motor accelerates to full speed before the ramp time setting has expired an automatic Anti Oscillation feature will override the remaining ramp time and full voltage will be applied This will prevent any surging or pulsation in the motor torque which might otherwise occur due to the load not being fully coupled to the motor when operating at reduced voltage and torque levels If the motor has not reached full speed at the end of the ramp time setting the current limit setting will proportionally control the maximum output torque Feedback sensors and protection algorithms in the DXT Series provide protection from a stall condition an overload condition or excessive acceleration time The Current Limit feature is provided to accommodate installations where there is limited power available for e
74. e and time points on a graph The DXT Series will then accelerate the motor following these points e Tachometer Feedback Ramp Uses a closed loop speed follower method monitoring a tachometer input signal from the motor or load shaft to provide a linear RPM acceleration 1 4 2 Deceleration The DXT Series provides the user with the option of having the load coast to a stop or controlling the deceleration by slowly reducing the voltage to the motor upon initiating a stop command The Decel feature is the opposite of DC injection braking in that the motor will actually take longer to come to a stop than if allowed to coast to a stop The most common application for the Decel feature is pumping applications where a controlled stop prevents water hammer and mechanical damage to the system 1 5 General Protection The DXT Series is provided with a built in motor protection relay that can be programmed for primary protection of the motor load system Operation of the DXT Series can be divided into 4 modes Ready Start Run and Stop 1 5 1 Ready Mode In this mode control and line power are applied and the Starter is READY for a start command Protection during this mode includes the monitoring of current for leakage through multiple shorted SCRs or welded contacts on the Bypass Contactor Other protection features in effect are SCR Heat Sink Temperature Shorted SCR Phase Rotation if enabled Line Frequency Trip Window External Input Faul
75. ection Start Ramp 2 Power The Power Ramp feature has three programmable set points Initial Power Ramp Time and Maximum Power The Initial Power set point allows the user to define an initial KW A CAUTION motor power value that will be applied to the motor when the start ix sequence is begun It has a range of 0 100 a default value of It is recommended to use the power ramp ona 20 loaded motor Using the power ramp on an unloaded motor may result is shorter than anticipated acceleration times e The Ramp Time set point functions as all other ramp time set points and allows the user to define a time period during which the applied KW motor power will be increased linearly to the Maximum Power value set point The adjustment range is 1 to 120 seconds Once the Power Limit value is reached the system enters a constant power mode that regulates the applied motor power until the motor reaches full speed e The Maximum Power set point has an adjustment range of 0 300 and a default value of 80 Power Ramp Calculations The default motor power value is derived from the line voltage and programmed FLA using a unity power factor This allows for approximation of the motor power rating without any other input data During the Power Ramp process the RMS line voltage RMS motor current and power factor are measured on a cycle by cycle basis and applied to the Power Ramp algorithm The CPU then calculates the True RMS motor p
76. ent loads from beginning to over swing on sudden stops ACCELERATION RUNNING MODE DECELERATION START DECELERATION MODE 25 ES i TORQUE i i STOP STOP LEVEL i i DECELERATION E VOLTAGE MODE LEVEL ACCELERATION DECELERATION Motortronics Page 21 DXT Digital Solid State Starter User Manual 39 1250A 3 4 1 Start Deceleration Voltage Factory Setting 60 of line voltage Range 0 100 of line voltage The step down voltage adjustment eliminates the dead band in the deceleration mode that is experienced while the voltage drops to a level where the motor deceleration is responsive to decreased voltage This feature allows for an instantaneous drop in voltage when deceleration is initiated 3 4 2 Stop Deceleration Voltage Factory Setting 20 of line voltage Range 0 100 of line voltage The stop voltage level setpoint is where the deceleration voltage drops to zero 3 4 3 Deceleration Time Factory Setting 5 sec Range 0 60 sec The deceleration ramp time adjusts the time it takes to reach the stop voltage level set point The unit should be restarted and stopped to verify that the desired deceleration time has been achieved PER HOUR WHEN CALCULATING THE NUMBER OF STARTS PER HOUR A DECEL CURVE SHOULD BE COUNTED AS A START CURVE FOR EXAMPLE RECOMMENDED NUMBER OF STARTS PER HOUR WARNING EXCEED THE MOTOR MANUFACTURER S RECOMMENDED
77. er a normally open or normally closed contact Name Ext Input 2 The user can assign a description name to the input to easily identify the cause of external trip or External Input 2 Time Delay Upon a change in contact setting the unit will wait the programmed amount of time before generating an output If no delay is needed then input 0 seconds The controller will post an event upon seeing a change in state Motortronics Inc Page 49 DXT Digital Solid State Starter User Manual 39 1250A e Dual Ramp External Input 3 The setup screens and setpoints for External Input 3 include the option of being configured for Dual Ramp In Dual Ramp mode the initial contact setting is the same as the START RAMP 1 Upon a change in input contact state the DXT will switch over to START RAMP 2 and use that setting for start control mode Note The start RAMP types should only be switched while the motor is stopped In Setpoint Page 4 Relay Assignments do not assign any output relay to this function The DXT will ship with External input 3 programmed for dual ramp If it is not needed disable the dual ramp Note The start RAMP types should only be switched while the motor is stopped In Setpoint Page 4 Relay Assignments do not assign any output relay to this function The controller is programmed with External inout 3 programmed for dual ramp If it is not needed disable the dual ramp e Name Ext Input 3 The user can assign a descript
78. es with terminal numbers Note the settings of all jumpers Remove the mounting screws Remove the old printed circuit board Mount the new printed circuit board Install the mounting screws Set the jumpers to the same position as on the old board Install the control wires onto correct terminals per tag sequence Install the plugs Apply power to the unit and program all parameters to values in old board Test Motortronics Inc Page 79 DXT Digital Solid State Starter User Manual 39 1250A 7 5 Interconnect Drawing Motortronics Inc Page 80 DXT Digital Solid State Starter User Manual 39 1250A 555 805 18 3 555 05 81 Motortronics Inc DXT Digital Solid State Starter User Manual 39 1250A 4 MOTORTRONICS Solid State AC Motor Controls For the latest product information visit www motortronics com Phasetronics Inc dba as Motortronics 1600 Sunshine Drive Clearwater Florida 33765 USA Tel 727 573 1819 or 888 767 7792 Fax 727 573 1803 or 800 548 4104 E Mail sales motortronics com User Manual Rev 5 30 Aug 13th 2012 Motortronics Inc Page 82
79. et e iie eo cce ve Dee nee ler eben c ee eee iEn eo Ee AN 67 tle 68 4 Ee O 69 MP 5 Event Recorder 60 Events cie re iit oec co pica er AEAEE TASS 70 6 M 71 NE cu P A A 72 Chapter 7 Maintenance and Troubleshooting 73 81 Z Fallure Arialysis ione aane 73 75 7 2 SCR Testing Procedure aci ecciesie padrino sa do deae Feud Edu aic eoa Rl aea d adn abr ddat 76 7 3 Replacing SCR 71 78 7 4 Replacing the Main Control lt 79 7 5 Interconnect Drawing nce retener eee ER ecc iu Ree c Rute E pug 80 81 Motortronics Page 3 DXT Digital Solid State Starter User Manual 39 1250A Chapter 1 Introduction This chapter is a brief introduction to the DXT Series Soft Starter and describes product operation and unit features 1 1 Overview The DXT Series is a high end digitally programmable solid state reduced voltage motor starter This heavy duty starter provides reduced voltage step less soft starting of 3 phase AC induction motors It protects mechanical components from damaging torque stress and electrical syste
80. gital Solid State Starter User Manual 39 1250A 7 1 Failure Analysis Continued Problem Phase Loss Overload Stall prevention Under Voltage Trip Self test Failure Line Frequency Trip Any Ground Fault Trip Short Circuit Trip Motortronics Inc CPU LCD Display AUX 2 LED Relay Possible Cause Solutions Loss of 1 or more phases of power from Trip AUX1 utility or generated Blown power fuses Check for short circuits Check motor nameplate versus proper programming programmed parameters Trip AUX1 Possible load damage Check motor currents or jammed load Improper setting for Trip AUX1 motor load condition cutem imi sening Damaged load Check for load failure Improper programming Check Setpoint settings Wrong position of Check disconnect or open disconnect or breaker breaker Reduce current limit setting Trip AUX1 Feed Transformer too saturation or small sagging power supply transformer Overloaded motor Check load Failed GPU of Main Contact factory Firing Board Trip AUX1 a Vibration Check internal wiring connections Troubleshoot and repair G tor P generator enerator Power Contact utility company Trip AUX1 Problem or grid change Main board failure Three phase power removed from Main Improper programming Check Setpoint settings Any wire going to ground
81. gures the RTD failure alarm when RTD option is included and the thermal register alarm RTD Failure Alarm enabled and an RTD shorts or open an alarm occurs Only if RTD option is installed Thermal Register Alarm Sets a level in the thermal register to generate an alarm when the Thermal Register Capacity Used has exceeded this level Thermal Alarm Delay The amount of time that the Thermal Register Used must exceed the Setpoint before an alarm condition will occur SP12 3 Thermal Register Setup Information This Setpoint group will configure the thermal register and indicate to the DXT Series which inputs to use when thermal modeling Cold Stall Time Enter the time from the motor manufacturer s specification sheet or use the time defined by the OL Class This Setpoint is used to define the thermal capacity of the motor Hot Stall Time Enter the amount of time specified by the motor manufacturer or use half of the time defined by the OL Class Stopped Cool Down Time The time the motor needs to cool down after it has stopped Use only the data provided by the motor manufacturer This Setpoint is used to configure the cooling rate of the thermal register Running Cool Down Time The amount of time the motor needs to cool down while running Use only the data provided by the motor manufacturer Relay Measured Cool Rates When the RTD option is supplied the DXT Series can be configured to use the measured cooling rates from the
82. hanical problems Undercurrent Alarm Delay The amount of time the undercurrent condition must exist before an alarm will occur SP3 4 Overcurrent Alarm Level Typically used to indicate when the motor is overloaded This feature can be used to either stop the feed to the equipment or warn operators of an overload condition Overcurrent Alarm Delay The amount of time the overcurrent condition must exist before an alarm will occur SP3 5 Overcurrent Trip Level Typically used to indicate the motor is severely overloaded and at which point a trip occurs Overcurrent Trip Delay The amount of time the overcurrent condition must exist before a trip will occur Trip Delay Time Overcurrent Trip Setting 250 FLA Current Current Level Running Under a pn Normal Load Time gt Trip FIG SP3 5 Motortronics Inc Page 2 Phase amp Ground Settings Y IMBALANCE ALARM LEVEL 15 FLA Range 5 30 Off Increments of 1 lt gt IMBALANCE ALARM DELAY 1 5 SEC Range 1 0 20 0 SEC Increments of 0 1 IMBALANCE TRIP LEVEL 20 FLA Range 5 30 Off Increments of 1 lt gt IMBALANCE TRIP DELAY 2 0 SEC Range 1 0 20 0 SEC Increments of 0 1 UNDERCURRENT ALARM LEVEL OFF Range 10 90 Off Increments of 1 lt gt UNDERCURRENT ALARM DELAY 2 0 SEC Range 1 0 60 0 SEC Range 100 300 Off Increments of 1 In
83. he motor protection overload class range from 5 30 Ex Overload Class 10 will trip in 10 seconds at six times the programmed motor FLA 1x10 1000 100 Overload Class 30 Overload Class 25 Overload Class 20 0 1 2 3 4 5 6 7 8 9 Motor FLA SP1 4 NEMA design The motor design maximum allowed slip Select from Class A through F SP1 5 Insulation Class The motor insulation temperature class Select A B C E F G N or S SP1 6 Line Voltage Input Applied Voltage SP1 7 Line Frequency The user may choose either 50 Hz or 60 Hz Motortronics Inc Page 35 DXT Digital Solid State Starter User Manual 39 1250A SP 2 Starter Configuration Setpoint Page 2 Provides multiple choices for starting ramps that can be selected for particular loads and applications If Voltage is selected these screens will appear If Current is selected these screens will appear MENU INITIAL VOLTAGE INITIAL CURRENT 1 20 1 200 FLA Range 0 100 Range 0 300 Page 2 Increments of 1 Increments of 1 Starter Configuration RAMP TIME RAMP TIME 1 10 SEC 1 10 SEC START CONTROL MODE 1 120 1 120 ip START RAMP 1 Increments of 1 Increments of 1 OPTIONS Jog Start Ramp 1 CURRENT LIMIT MAXIMUM CURRENT Start Ramp 2 Dual Ramp Custom 1 350 FLA 1 350 FLA Accel Curve Start Disabled Range 200 500 Increments of 10
84. hing because this trip should require a visual inspection of the motor and starter before issuing a manual reset to release the relay after a trip has been stored DOWN ARROW 4 TIMES Page 5 Relay Configuration Option Yes or No TRIP AUX1 RELAY TRIP AUX1 RELAY FAIL SAFE NO LATCHED YES ALARM AUX2 RELAY ALARM AUX2 RELAY FAIL SAFE NO LATCHED NO AUX 3 RELAY AUX3 RELAY FAIL SAFE NO LATCHED NO AUX4 RELAY AUX4 RELAY FAIL SAFE NO LATCHED NO Motortronics Inc Page 46 MENU gt DXT Digital Solid State Starter User Manual 39 1250A SP 6 User Configuration Setpoint Page 6 Security Level 2 DOWN ARROW 5 TIMES Page 6 User I O Configuration ENABLED TACHOMETER SCALE MANUAL TACH SCALE SELECTION DISABLED 4 0 mA 0 RPM Option Enabled or Disabled v Range 0 3600RPM Increments of 5 MANUAL TACH SCALE 20 0 mA 2000 RPM Range 0 3600RPM TACH RAMP TIME 20 SEC Range 1 120 Increments of 1 TACH ACCEL TRIP MODE SELECT DISABLED TACH UNDERSPEED TRIP PT 1650 RPM Range 0 3600RPM Increments of 5 c Option Underspeed Overspeed or Disabled OVERSPEED TRIP PT 1850 RPM Range 0 3600RPM Increments of 5 TACH ACCEL TRIP DELAY 1 SEC Range 1 60 SEC Increments of 1 ANALOG OU
85. hod is useful for applications where the load conditions change frequently and where different levels of torque are required Typical applications include material handling conveyors positive displacement pumps and drum mixers Voltage is increased from a starting point Initial Torque to full voltage over an adjustable period of time Ramp Time To achieve Voltage Ramping select VOLTAGE for the START RAMP 1 TYPE Setpoint and set CURRENT LIMIT 1 Setpoint to 600 the maximum setting Since this is essentially Locked Rotor Current on most motors there is little or no Current Limit effect on the Ramp profile Jog Voltage Setting Voltage Ramp 1 Voltage New Start Command Jog Button Start Control Mode Held Setpoint changed from Jog to Start Ramp 1 Type Voltage FIG SP2 3 Example of Switching from Jog to Start Ramp 1 Type Voltage Voltage Ramping with Current Limit is the most used curve and is similar to voltage ramping however it adds an adjustable maximum current output Voltage is increased gradually until the setting of the Maximum Current Limit Setpoint is reached The output is held at this level until the motor accelerates to full speed This may be necessary in applications where the electrical power is limited Typical applications include portable or emergency generator supplies utility power near the end of a transmission line and utility starting power demand restrictions Note Using Current Limit will override
86. ing Page Level Description Default Section Jog Start Ramp 1 Start Ramp 2 Custom SP2 1 Start Control Mode Start Ramp 1 Accel Curve Start Disabled Dual Ramp Tach Ramp Jog Voltage 50 5 75 Off SP2 2 Start Ramp 1 Type Voltage Voltage Current Initial Voltage 1 20 0 100 Ramp Time 1 10 sec 1 120 sec Current Limit 1 350 FLA 200 600 SP23 Initial Current 1 20096 FLA 0 300 Ramp Time 1 10 sec 1 120 sec Maximum Current 1 35096 FLA 200 600 96 5 8 Start Ramp 2 Disabled Disabled Voltage Power Initial Voltage 2 60 0 100 96 Ramp Time 2 10 sec 1 120 sec SP2 4 5 S Current Limit 2 35096 FLA 200 600 96 A Initial Power 2 20 0 100 2 8 Ramp Time 2 10 sec 1 120 sec 2 80 0 300 z Kick Start Type Disabled Voltage or Disabled Kick Start Voltage 65 10 100 SP2 5 Kick Start Time 0 50 sec 0 10 2 00 Deceleration Disabled Enabled or Disabled Start Deceleration Voltage 60 0 100 SP2 6 Stop Deceleration Voltage 30 0 99 Deceleration Time 5 sec 1 60 sec Timed Output Time Off 1 1000 sec Off SP2 7 Run Delay Time 1 Sec 1 30 sec Off SP2 8 At Speed Delay Time 1 Sec 1 30 sec Off SP2 9 Bypass Pull in Current 100 FLA 90 300 SP2 10 Motortronics Inc Page 27 DXT Digital Solid State Starter User Manual 39 1250A 5 1 3 Phase and Ground Settings Setpo
87. int Page 3 Description Farge tt pe Section Imbalance Alarm Level 15 FLA 5 30 Off SP3 1 Imbalance Alarm Delay 1 5 sec 1 0 20 0 sec Imbalance Trip Level 20 5 30 Off SP3 2 Imbalance Trip Delay 2 0 sec 1 0 20 0 sec Undercurrent Alarm Level Off 10 90 Off SP3 3 Undercurrent Alarm Delay 2 0 sec 1 0 60 0 sec Overcurrent Alarm Level Off 100 300 Off SP3 4 Overcurrent Alarm Delay 2 0 sec 1 0 20 0 sec Overcurrent Trip Level Off 100 300 95 Off SP3 5 Overcurrent Trip Delay 2 0 sec 1 0 20 0 sec Phase Loss Trip Enabled Enabled or Disabled SP3 6 Phase Loss Trip Delay 0 1 sec 0 20 0 sec Phase Rotation Detection ABC ABC ACB or Disabled 8 37 Phase Rotation Trip Delay 1 0 sec 1 0 20 0 sec Ground Fault Alarm Level Off 5 90 Off SP3 8 Ground Fault Alarm Delay 0 1 sec 0 1 20 0 sec Ground Fault Lo Set Trip Level Off 5 90 Off SP3 9 Ground Fault Lo Set Trip Delay 0 5 sec 0 1 20 sec v Ground Fault Hi Set Trip Level Off 5 90 Off SP3 10 3 3 Ground Fault Hi Set Trip Delay 0 008 sec 0 008 0 250 sec f oe e Overvoltage Alarm Level Off 5 30 Off P3 11 o Overvoltage Alarm Delay 1 0 sec 1 0 30 0 sec si 2 9 3 5 Overvoltage Trip Level 10 5 30 Off 5 s 2 Overvoltage Trip Delay 2 0 sec 1 0 30 0 sec Sate 8 Undervoltage Alarm Level Off 5 30 Off SP3 13 Undervoltage Alarm Delay 1 0 sec
88. ion User defined Up to 15 Characters RTD 11 Alarm Level Off 0 240C 32 464F Off RTD 11 Trip Level Off 0 240C 32 464F Off RTD 12 Type Off Same as Stator Phase A1 RTD 12 Description User defined Up to 15 Characters RTD 12 Alarm Level Off 0 240C 32 464F Off RTD 12 Trip Level Off 0 240C 32 464F Off Motortronics Inc Page 32 DXT Digital Solid State Starter User Manual 39 1250A 5 1 10 Password Level Configuration Setpoint Page10 Setpoint Security E Factory Setting Description Ran ion Page Level saith dale Default ange Sectio Page 10 Level 3 Set Level 2 Password 100 000 999 Three Digits SP10 1 Password Password Set Level 3 Password 1000 0000 9999 Four Digits SP10 2 5 1 11 Communications Configuration Setpoint 11 Setpoint Security Factory Setting Page Level Description Default Section Set Front Baud Rate 9 6 KB sec 2 4 4 8 9 6 19 2 38 4 KB sec SP11 1 Set Modbus Baud Rate 9 6 KB sec 2 4 4 8 9 6 19 2 38 4 KB sec SP11 2 Level 3 Modbus Address Number 247 1 247 SP11 3 cations Password Set Access Code 1 1 999 SP11 4 Set Link Baud Rate 38 4 KB sec 2 4 4 8 9 6 19 2 38 4 KB sec SP11 5 Remote Start Stop Disabled Enabled or Disabled SP11 6 5 1 12 System Setpoint Page 12 Setpoint Security Factory Setting
89. ion name to the input to easily identify the cause of external trip or alarm Up to 15 characters including spaces can be used to assign the name e External Input 3 Time Delay Upon a change in contact setting the unit will wait the programmed amount of time before generating an output If no delay is needed then input 0 seconds The controller will post an event upon seeing a change in state e External Input 3 Type The external input can be set as either a normally open or normally closed contact Thermostat Thermostat input 4 is factory wired and set Do not alter any settings associated with this input We recommend that this function remains enabled If the thermostat indicates an over temperature condition the DXT will trip the motor e Name Ext Input 4 The user can assign a description name to the input to easily identify the cause of external trip or alarm Up to 15 characters including spaces can be used to assign the name e External Input 4 Time Delay Upon a change in contact setting the unit will wait the programmed amount of time before generating an output If no delay is needed then input 0 seconds The controller will post an event upon seeing a change in state e External Input 4 Type The external input can be set as either a normally open or normally closed contact Motortronics Inc Page 50 DXT Digital Solid State Starter User Manual 39 1250A
90. it tag and lock out Warning Failure to remove both line and control power before starting this procedure may cause personal injury or death A PEG style clamp is used for a puk style SCR and it is recommend to replace the entire SCR Heat Sink assembly when necessary If however a single SCR must be field replaced please contact the factory for assistance Label the location of the wires connected to the SCR and or Heat Sink e Remove any lugs snubbers printed circuit boards and associated wiring that may get in the way of reaching the assembly or faulty SCR Document the location and wiring of all parts before removing them to facilitate the reinstallation of the devices later e Then remove the PEG clamps holding the SCR stack together Remove the top heatsink Use extreme caution when handling the heat sink so it does not become dented or damaged e Remove the faulty SCR device noting the direction in which the SCR is oriented The new SCR puck must be inserted in the same direction e Make sure the SCR mounting surface is clean and free from dirt nicks and scratches Do not sand or scrape the SCR mounting surface If necessary super fine Scotch Brite pads can be used to clean the heatsink before installing the new SCR e thin 3 mil thick layer of thermal grease uniformly along both sides of the SCR Spread the grease to cover the entire surface of both sides of the SCR in a manner that minimizes air pockets The grease
91. it if it is damaged Check for loose mechanical assemblies or broken wires which may have occurred during transportation or handling Loose electrical connections will increase resistance and cause the unit to function improperly Prior to beginning the installation verify that the motor and DXT unit are rated for the proper amperage and voltage 2 3 Location The proper location of the unit is an important factor in achieving the unit s specified performance and normal operation lifetime The unit should always be installed in an area where the following conditions exist Ambient Operating Temperature 0 C to 50 C 32 F to 122 F Optional space heaters can be provided for operation in ambient temperature to 20 C Protected from rain and moisture Humidity 5 to 9596 non condensing Free from metallic particles conductive dust and corrosive gas Free from excess vibration below 0 5G Open panel units must be mounted in the appropriate type of enclosure Enclosure size and type must be suitable to dissipate heat generated by the DXT Series Contact factory for assistance in sizing the enclosure Warning Do not service equipment with voltage applied The unit can be the source of fatal electrical shocks To avoid shock hazard disconnect main power and control power before working on the unit Warning labels must be attached to terminals enclosure and control panel to meet local codes 2 4 Mounting and Clea
92. ith an AUX relay When enabled and upon a start command it waits until the programmed time plus the run delayed time has expired The relay energizes and remains so until a stop command is received It de energizes upon receiving a stop command SP2 8 Run Delay Time Can be used with an AUX relay The delay timer begins upon receipt of the start command The relay will then drop out when the time has expired SP2 9 At Speed Delay Time Used with the AUX 4 relay it energizes when the motor reaches At Speed and the programmed delay time has expired The relay remains energized until a stop command has been received SP2 10 Bypass Pull In Current Motortronics Inc Page 40 DXT Digital Solid State Starter User Manual 39 1250A SP 3 Phase amp Ground Settings Setpoint Page 3 Security Level 2 SP3 1 Imbalance Alarm Level This is an advance warning of a phase imbalance problem The problem may not be a fault in the motor but merely caused by imbalanced voltages Imbalance Alarm Delay The amount of time the imbalance condition must exist before an alarm occurs SP3 2 Imbalance Trip Level This will trip the motor on excessive phase imbalance The trip level should be programmed to a higher value than the alarm level Imbalance Trip Delay The amount of time the imbalance condition must exist before a trip will occur SP3 3 Undercurrent Alarm Level Typically used to warn of possible load loss a coupling break or other mec
93. motor does not come up to speed increase the current limit setting If the motor does not start to turn as soon as desired raise the starting voltage adjustment Adjustment description and procedures are described as follows See section 5 2 SP 2 1 3 3 1 Starting Voltage Factory Setting 20 of line voltage Range 0 100 of line voltage Starting voltage adjustment changes the initial starting voltage level to the motor 3 3 2 Ramp Time ul 25 ES Factory Setting 10 sec Range 0 120 sec STARTING Ramp time adjustment changes the amount of time it takes to reach the current VOLTAGE limit point or full voltage if the current limit point was not reached 3 3 3 Current Limit Factory Setting 35096 of programmed FLA Range 20096 600 of programmed FLA The main function of current limit is to cap the starting current It may also be used to extend the ramping time if required The interaction between the voltage ramp and the current limit will allow the soft start to ramp the motor until the maximum current is reached and the current limit will hold the current at that level The current limit must be set high enough to allow the motor to reach full speed The factory setting of 35096 is a good starting point Do not set the current limit too low on variable starting loads This could cause the motor to stall and eventually cause the overload protection to trip Motortronics Page 20 DXT Digital Solid State St
94. ms from the effects of high motor inrush currents The DXT Series includes advanced motor and load protection features just like those found in expensive motor protection relays These include retentive thermal memory dynamic reset capacity true thermal modeling separate trip curves for start and run protection overload alarm etc But in the case of the DXT Series these features were built in as standard providing a cost effective and reliable motor starting and protection scheme for your critical motor applications The DXT Series features an easy to use keypad operator interface for programming and status indication It includes a large tactile feedback keypad LED status indicators and a 2 line x 20 character backlit display using plain English text readout In addition to programming the standard parameters such as starting torque ramp time current limit and decel control other features such as programmable overload trip curves NEMA UL Classes 5 30 and inhibits that include starts per hour time between starts and coast down back spin lockout protection can also be programmed for your specific application needs 1 2 Specifications GENERAL Type of Load Three phase AC Induction motors or synchronous motors Unit Running Overload Capacity gt j Oo Of Percent of motor FLA 125 Continuous 500 60 seconds or 600 30 seconds Frequency 50 or 60Hz 2Hz hardware selectable Power Circuit 6 SCRs
95. ning When drilling or punching holes in the enclosure cover the electrical assembly to prevent metal filings from becoming lodged in areas which can cause clearance reduction or actually short out electronics After work is completed thoroughly clean the area and re inspect the unit for foreign material Make sure there is sufficient clearance six inches all around the unit for cooling wiring and maintenance purposes To maximize effective air flow and cooling the unit must be installed with its heat sink ribs oriented vertically and running parallel to the mounting surface Warning Remove all sources of power before cleaning the unit In dirty or contaminated atmospheres the unit should be cleaned on a regular basis to ensure proper cooling Do not use any chemicals to clean the unit To remove surface dust use 80 to 100 psi clean dry compressed air only A three inch high quality dry paint brush is helpful to loosen up the dust prior to using compressed air on the unit Motortronics Page 12 2 5 Power Terminal Wire Range and Tightening Torque DXT Digital Solid State Starter User Manual 39 1250A Model Max MEE KW Terminal Wire Torque Number Amps 208V 230V 480V 600V 230V 400V Range Ibs in DXT 39 39 10 n 2
96. nual 39 1250A SP 10 Set Password Setpoint Page 10 Security Level 3 The DXT Series has three levels of user programmable setpoint screens Level one setpoints do not require a password because the data contained in level one is basic nameplate data and starter control Level two setpoint screens require a three digit password to configure the protection schemes Level three setpoint screens require a four digit password to access the full range of protection and starter schemes MENU i DOWN ARROW 9 TIMES rege 10 SET LEVEL 2 SET LEVEL 3 SECURITY SET gt PASSWORD PASSWORD 100 PASSWORD 1000 Range 000 999 Range 0000 9999 SP10 1 Set Level 2 Password This level uses a 3 digit password The default level 2 password is 100 SP10 2 Set Level 3 Password Level three uses a 4 digit password The default level 3 password is 1000 SP 11 Communications Setpoint Page 11 Security Level 3 SP11 1 Set Front Baud Rate Configures the RS232 communications baud rate SP11 2 Set Modbus Baud Rate Configures the Modbus communications baud rate SP11 3 Modbus Address Number Assigns a Modbus address to the unit SP11 4 Set Access Code Assigns an access code to the Modbus addressing This is typically not used SP11 5 Set Link Baud Rate Configures the RS422 communications baud rate between the keypad operator and the CPU board For applications with remote keypad only SP11 6 Remote Start
97. of 1 Motortronics Inc Page 52 SP 7 Custom Acceleration Curve Setpoint Page 7 Security Level 3 Continued DXT Digital Solid State Starter User Manual 39 1250A Continued from prev page CURVE C VOLTAGE LEVEL 4 45 Range 0 100 Increments of 1 CURVE C RAMP CUSTOM CURVE C Cont CURVE C VOLTAGE LEVEL 6 67 Range 0 100 Increments of 1 CURVE C RAMP TIME 6 2 SEC Range 1 60 SEC Increments of 1 TIME 4 2 SEC Range 1 60 SEC Increments of 1 CURVE C VOLTAGE LEVEL 5 55 Range 0 100 Increments of 1 CURVE C RAMP TIME 5 2 SEC Range 1 60 SEC Increments of 1 CURVE C VOLTAGE LEVEL 7 82 Range 0 100 Increments of 1 CURVE C RAMP Motortronics Inc TIME 7 2 SEC Range 1 60 SEC Increments of 1 CURVE VOLTAGE LEVEL 8 100 Range 0 100 Increments of 1 CURVE C RAMP TIME 8 2 SEC Range 1 60 SEC Increments of 1 CURVE C CURRENT LIMIT 350 FLA Range 200 500 Increments of 10 Page 53 DXT Digital Solid State Starter User Manual 39 1250A SP 8 Overload Curve Configuration Setpoint Page 8 Security Level 3 Configures the unit s start and run protection mode The unit has independent start and run curve protection and the settings can be based on the OL Class or set by the motor s locked rotor current and time
98. onics Inc Screen 1 Phase A B C and ground fault option current Screen 2 Displays the average current the percent of imbalance and the motor s RPM available with tachometer input Screen 3 Displays the motor load in percent of motor FLA Screen 4 Displays the line frequency and the present Phase Order Screen 5 Displays the percent of the remaining thermal register In order for the motor to successfully start the percentage must be greater than the thermal capacity required for a successful start Screen 6 Displays the thermal capacity required to successfully start the motor Screen 7 Displays the average time required to start Screen 8 Displays the average current during start Screen 9 Displays the measured I2T required to start the motor Screen 10 Displays the amount of time required to start the motor during the last successful start Page 66 DXT Digital Solid State Starter User Manual 39 1250A MP 2 Metering Metering Page 2 Displays the DXT Series statistical voltage metering information MENU METERING PAGE 2 VOLTAGE amp POWER DATA Vbc Vea P F Screen 1 Displays Phase A B C and Power Factor Note P F N A Motor stopped P F LG Lagging P F LD Leading IA IB HHT Screen 2 Displays 3 phase Currents amp Voltages IC HHHH G F HHHH The format is HHRHH HHHH HHRHH HEH HHRHH HHHHH kW
99. or is not available Note that line voltage will appear across the output terminals if there is no motor or load connected to the unit In areas where lightning is a significant problem station type lightning arrestors should be considered and utilized on the input power source 2 7 1 Grounding Connect the ground cable to the ground terminal as labeled on the unit Refer to the National Electrical Code for the proper ground wire sizing and be sure that the ground connector is connected to earth ground 2 8 Control Connections Separate 120VAC supply is required 240VAC available as option The control voltage should be connected to pins 1 and 6 of TB4 on the power board Note On larger units TB4 is factory wired to the panel to facilitate connections This control voltage must be customer supplied unless an optional control power transformer TB4 See chart has been supplied with the unit Recommended Transformer Sizes Panel NEMA 1 NEMA 4 12 DXT 150 to DXT 180 50 VA 100 VA 250 VA DXT 220 50 VA 100 VA 500 VA DXT Model by Amps 120 240 120 240 Unit comes standard with 120VAC control Order 240VAC control as an option if required DXT 288 to DXT 360 250 VA 250 VA 500 VA DXT 414 to DXT 550 250 VA 250 VA 750 VA DXT 718 to DXT 862 500 VA 500 VA 1 DXT 1006 to DXT 1150 500 VA 750 VA 1 5 KVA Three Wire Connection TB4 DXT 1200 to DXT 1250 500 VA 750 VA 1 5 KVA
100. or scheduled to reduce overall demand Demand is calculated by taking samples of the output current KW KVAR and kVA over a period of time then averaged and stored into memory Motortronics Inc Page 43 DXT Digital Solid State Starter User Manual 39 1250A SP 4 Relay Assignment Setpoint Page 4 Security Level 2 MENU l DOWN ARROW 3 TIMES PHASE REVERSAL 1ST TRIP AUX1 MOTOR RUNNING 1ST NONE Page 4 Relay Assignment Range TRIP AUX1 ALARM AUX2 AUX3 v OVERVOLTAGE TRIP 1ST TRIP AUX1 ALARM 1ST ALARM AUX2 UNDERVOLTAGE TRIP 1ST TRIP AUX1 STATOR RTD ALARM 1ST ALARM AUX2 POWER FACTOR TRIP 1ST NONE NON STATOR RTD ALARM 1ST ALARM AUX2 X AUX4 1 vv O L TRIP 1ST TRIP ONLY v TRIP 1ST TRIP AUX1 v S C TRIP 1ST TRIP ONLY ACCEL TRIP RTD FAILURE ALARM v OVERCURRENT TRIP 1ST TRIP AUX1 x 1ST TRIP AUX1 ee A STATOR RTD TRIP v NON STATOR RTD TRIP 1ST TRIP AUX1 G F HI SET TRIP 1ST TRIP AUX1 1ST TRIP AUX1 eS _ G F LO SET TRIP 1ST NONE 1ST ALARM AUX2 INHIBITS TRIP SELF TEST FAIL 1ST TRIP AUX1 1ST TRIP AUX1 A SHUNT TRIP THERMAL REGISTER 1ST AUX3 1ST ALARM AUX2 A BYPASS DISCREPANCY U V ALARM 1ST TRIP AUX
101. or the controller to give proper output If selecting RTD the RTD option must be installed and an RTD input signal must be present for a proper output to be given from the analog output e Analog Output 1 4 mA Enter a value that the 4mA level will represent for the selected function typically this value should be 0 e Analog Output 1 20 mA Enter a value that the 20mA level will represent for the selected function SP6 4 Analog Output Z2 All of the Setpoints and setup screens for Analog Output 2 are the same as those for Analog Output 1 Motortronics Inc Page 48 DXT Digital Solid State Starter User Manual 39 1250A SP 6 User Configuration Setpoint Page 6 Security Level 2 Continued NAME EXT INPUT 1 SELECT DISABLED lt gt NAME EXT INPUT 1 lt gt Options Enabled on NAME EXT INPUT 1 TYPE N O NAME EXT INPUT 1 gt TIME DELAY 1 SEC Range 0 60SEC See Text f SN Continued Disabled Options N O or N C Increments of 1 EXTERNAL INPUT 2 EXTERNAL INPUT 2 EXTERNAL INPUT 2 USER gt SELECT DISABLED 7 NAME EXT INPUT 2 lt gt N O TIME DELAY 0 SEC PROGRAMM Opti Enabled See Text f Range 0 60 SEC ABLE Disabled rss 9 Mese Options or N C Increments of 1 EXTERNAL INPUTS DUAL RAMP gt NAME EXT INPUT 3 PEN DUAL RAMP DUAL RAMP SELECT DUAL RAMP DUAL RAMP TYPE N O TI
102. ower and will control the SCR firing to deliver the programmed power ramp values to the motor A Maximum Power Initial Power Power Ramp FIG SP2 4 Initial Power The Initial power set point allows the user to define an initial KW motor power value that will be applied to the motor at the beginning of the start sequence e Ramp Time 2 See Ramp Time 1 for description e Maximum Power Sets the maximum motor power the starter will allow during the acceleration SP2 5 Kick Start Used as an initial energy burst in applications with high friction loads Kick Start Voltage The initial voltage as a percent of full voltage value that is needed to start the motor i e Breakaway or Initial Torque Kick Start Time The time the initial torque boost is applied Motortronics Inc Page 39 DXT Digital Solid State Starter User Manual 39 1250A SP2 6 Deceleration Allows the motor to gradually come to a soft stop e Start Deceleration Voltage Upon receiving a STOP command the output voltage initially drops to this value to allow deceleration to begin Represented as a percent of voltage value e Stop Deceleration Voltage The drop off point of the deceleration ramp Percent of voltage value The point at which the unit output drops to zero to end the deceleration e Deceleration Time The time to get from the Start Deceleration to the stop Deceleration Voltage Set point value SP2 7 Timed Output Used w
103. p the motor within milliseconds upon detecting a high level of ground current leakage This Setpoint is intended to detect low impedance faults Ground Fault Hi Set Trip Delay The amount of time that the ground fault condition must exist before a trip will occur SP3 11 Overvoltage Alarm Level Typically used to indicate when the line voltage is too high This is an alarm level Overvoltage Alarm Delay The amount of time that the overvoltage condition must exist before an alarm occurs Motortronics Inc Continued From Previous Page LEVEL OFF DELAY 1 0 SEC UNDERVOLTAGE ALARM UNDERVOLTAGE ALARM Range 5 30 Of Increments of 1 Range 1 0 30 0 SEC Increments of 0 1 UNDERVOLTAGE TRIP LEVEL 15 Range 5 30 Off Increments of 1 UNDERVOLTAGE TRIP DELAY 2 0 SEC Range 1 0 30 0 SEC Increments of 0 1 LINE FREQUENCY TRIP WINDOW DISABLED Hz Range 0 6 Disabled Increments of 1 lt gt LINE FREQUENCY TRIP DELAY 1 0 SEC Range 1 0 20 0 SEC Increments of 0 1 POWER FACTOR LEAD P F ALARM OFF Range 01 1 00 Off Increments of 01 P F LEAD ALARM DELAY 1 SEC Range 1 120 SEC Increments of 1 POWER FACTOR LEAD P F TRIP OFF Range 01 1 00 Off Increments of 01 lt gt P F LEAD TRIP DELAY 1 0 SEC Range 1 120 SEC Increments of 1 POWER FACTOR
104. r 240 VAC 5 A and 1200 VA These relays can respond to either a fault condition or an up to speed condition In the DXT all tripping functions have been assigned to the TRIP AUX1 relay and all alarm warning conditions have been configured to the ALARM AUX2 relay AUX 3 is used for a MOTOR RUNNING indication The relay contact will energize when the start command has been given and de energizes when a stop or fault condition occurs AUX4 is the AT SPEED contact When the motor has reached the end of its acceleration ramp the DXT will wait until the AT SPEED programmed time delay has expired Then the relay will energize until a stop command has been received To change AUXS or AUXA functions see Setpoint Page 4 2 C NO AUX1 2 AUG TRIP 1 ALARM RUN ATSPEED Relay Relay Relay Relay Relay Contacts on Power Board Rated 240 VAC 5A 1200VA Motortronics Page 15 DXT Digital Solid State Starter User Manual 39 1250A 2 9 Reference Section THIS SECTION IS FOR REFERENCE ONLY NO FIELD WIRING OR CONNECTIONS ARE REQUIRED 2 9a Optional RTD Board Compensation Signal Power Typical RTD Installation FIG 2 9a Optional RTD Board Motortronics Page 16 DXT Digital Solid State Starter User Manual 39 1250A 2 9b Power Board 123 45 6 7 TB4 Ex es s s s Ld Ll 579 Interlock Stop Start Interlo
105. r User Manual 39 1250A 5 12 4 Press Enter to CLR Thermal Register Allows the level three password user to clear the thermal register for emergency restarts MENU Y DOWN ARROW 11 TIMES PAGE 12 SYSTEM SETPOINTS DEFAULT DISPLAY SCREEN Motortronics Inc ALARMS THERMAL REGISTER SETUP INFORMATION HEN PRESS ENTER TO CLR THERMAL REGISTER gt gt gt METERING DATA PAGE 1 Enter Metering Page 1 4 Number for display RTD FAILURE ALARM ALARM DISABLED Option Enabled or Enabled or Disabled METERING DATA SCREEN 1 Enter Metering Screen Number for display j THERMAL REGISTER ALARM 90 THERMAL ALARM DELAY 10 SEC Range Off 40 95 Increments of 1 E COLD STALL TIME O L CLASS Range CLASS 4 40 SEC Increments of 1 HOT STALL TIME 1 2 CLASS i 4 40 SEC Increments of 1 STOPPED COOL DOWN TIME 30 MIN Range 10 300 MI Increments of 1 RUNNING COOL DOWN TIME 15 MIN Range 10 300 Gee Increments of 1 RELAY MEASURED COOL RATES DISABLED Option Enabled or Disabled E THERMAL REGISTER MINIMUM 15 Range 10 50 Off A Increments of 1 P MOTOR DESIGN AMBIENT TEMPERATURE 40 Range 10 90 C lH Increments 4 MOTOR DESIGN RUN TEMPERATURE 80 MAX
106. rd curves and is based on the programmed Motor FLA indicated on the motor nameplate The Dynamic Thermal Register is altered or biased by the following conditions Current Imbalance will bias the register higher due to additional motor heating as a result of a line current imbalance condition Normal Cooling is provided when the motor current drops below the overload pick up point or the motor is off line The Cooling rate is lower for motors that are off line such as after a trip since cooling fans are also inoperative RTD Input Requires the optional RTD monitor card provides a separate means of motor protection based on actual temperature measurements inside the motor It runs independently of the Thermal Register Model and does not provide input to or bias that model Both the RTD monitor card and internal overload algorithm run simultaneously and either one can generate a trip if the individual conditions are met Dynamic Reset is another feature that adds reliability and consistency to the performance of the DXT Series If a motor overload condition occurs and the Overload protection trips it cannot be reset until sufficient cool down time has elapsed This cool down time is determined by the Learned Thermal Capacity required to start the motor which must be regained before the overload can be reset This ensures sufficient thermal capacity for a successful restart of the motor Retentive Memory provides continuous overload pro
107. rrent Imbalance Imbalance Trip Level 5 30 current between any two phases Protection Imbalance Trip Delay 1 20 seconds Over Current Protection Trip Level 100 300 of motor FLA Electronic Shear Pin Trip Delay 1 20 seconds Under Current Trip Level 10 90 of motor FLA Soe ose Under Current Trip Delay 1 60 seconds Coast Down Back Spin Lockout Timer Coast Down Time Range 1 60 minutes Range 1 10 successful starts per hour oT e Time between starts 1 60 minutes between start attempts PROGRAMMABLE OUTPUTS Type Rating Form C DPDT Rated 5 amps 240 VAC max 960 VA Run Indication Programmable At Speed Indication Programmable Programmable Ramp Types Voltage Current or Power Ramp VR or CR Starting Torque 0 100 of line voltage VR or 0 600 of motor FLA CR Acceleration Adjustments Ramp Time 1 to 120 seconds Current Limit 200 60096 VR or CR Power Ramp 0 300 4 Options VR1 VR2 VR1 CR2 CR1 CR2 CR1 VR2 Dual Ramp Settings Dual Ramp Control Ramp 1 Default Ramp 2 selectable via dry contact input Begin Decel Level 0 100 of line voltage Deceleration Adjustments Stop Level 0 to 1 less than Begin Decel Level Decel Time 1 60 seconds Jog Settings Voltage Jog 5 100 Kick Voltage 10 100 Kick Time 0 1 2 seconds Phase Loss Shunt Trip Phase Imbalance Trip Overload Overtemp Overcurrent Short Circuit
108. rt Curve e Current Limit e Acceleration Time If decel is enabled the following parameters for Deceleration Time Start Decel Voltage and Stop Decel Voltage see SP2 must also be programmed See Setpoint Page 2 Sect 5 1 2 to make any adjustments Motortronics Inc Page 23 DXT Digital Solid State Starter User Manual 39 1250A Chapter 4 User Interface amp Menu Navigation This chapter explains the keypad operator interface the LCD descriptions and the programming features 4 1 Keypad Operator Interface The user keypad operator interface consists of e 2row by 20 characters Liquid Crystal Display LCD e 12LEDs e 8 pushbuttons Note The DXT Series is menu driven and there are three levels of programming The programming for two of these levels is password protected Level two requires a three digit password and level three requires a four digit password RESET ENTER 2 AUX RELAYS 4 1 1 Keypad Operator designations and functions ITEM DESIGNATION DESCRIPTION MENU Toggle between the menu selection for metering and set point pages RESET Will clear the trip indicator and release the trip relay When a set point page is active pressing the ENTER button once enters the EDIT mode In this mode set point values can be changed An Asterisk appears on the display to indicate edit mode is active After a set point value is changed pressing the ENTER button E
109. sed on the Motor FLA from the motor nameplate as programmed into the DXT Series e Measured Start Capacity The user enters a measured amount of thermal capacity from a pre selected successful start as a set point to the Thermal Register for the DXT Series to follow Learned Curve Protection The user sets the DXT Series to the LEARN mode and starts the motor under normal starting conditions The CPU then samples and records 100 data points during the start curve analyzes them and creates a graphical representation in memory The DXT Series is then switched to Curve Follow protection mode and monitors motor performance against this curve This feature is especially useful in initial commissioning tests to record a base line performance sample In this case it is not necessarily used for motor protection Motortronics Page 10 DXT Digital Solid State Starter User Manual 39 1250A 1 6 2 Run Mode overload protection is initiated when the DXT Series determines that the motor is At Speed Overload Protection is initiated when the motors RMS current rises above a pick up point as determined by the motor nameplate FLA and service factor Run mode protection is provided by the CPU monitoring the Dynamic Thermal Register Data for the Dynamic Thermal Register is accumulated from 12 calculations and cooling rates A trip occurs when the register reaches 100 as determined by the selected Overload Protection Curve NEMA Class 5 30 standa
110. start curve trips Displays the number of fail shunt trips Displays the number of phase loss trips Displays the number of tachometer acceleration trips Displays the number of undervoltage and overvoltage trips Displays the number of power factor trips Displays the number of phase reversal trips Displays the number of low control voltage Screen 15 Screen 16 Screen 17 Screen 18 Screen 19 Screen 20 Screen 21 trips Screen 22 Displays the number of external input 1 trips Displays the number of external input 2 trips Displays the number of external input 3 trips Displays the number of external input 4 trips Requires a Security Level 2 password to clear the statistics Screen 23 Screen 24 Screen 25 Screen 26 Motortronics Inc MENU i DOWN ARROW 6 TIMES METERING PAGE 7 STATISTICS Screen 1 MWH TOTAL Screen 2 TIME HOURS RUNNING HOURS TOTAL Screen3 PRESS ENTER TO CLEAR RUN HOURS Screen 4 TOTAL TRIPS S C TRIPS Screen 5 Y START O L TRIPS RUN TRIPS Screen 6 Screen 16 PHASE LOSS TRIP TRIPS Screen 17 FREQUENCY TRIPS TACH ACCEL TRIP TRIPS TRIPS Screen 7 1 Screen 18 OVERCURRENT UN TRIPS TRIPS ON TRIPS Screen 8 T Screen 19 1 STATOR TRIPS
111. tection and true thermal modeling by means of a running back up of the thermal register even if power is lost Upon restoration of power the DXT Series will read the Real Time Clock then recalculate and restore the thermal register to what it should be given the elapsed time and the cool down rate of the motor Learned Reset Capacity is a feature that is unique to the DXT Series By sampling the amount of thermal capacity used in the previous three successful starts the starter will not allow a reset until a sufficient amount of thermal capacity has been regained in the motor This prevents nuisance tripping and insures that unsuccessful start attempts which would otherwise use up the starts per hour capacity of the motor are not counted Motortronics Page 11 DXT Digital Solid State Starter User Manual 39 1250A Chapter 2 Installation 2 1 Receiving and Unpacking Upon receipt of the unit Carefully unpack the unit and inspect it for any shipping damage Report any damage immediately and file a claim with the freight carrier within 15 days of receipt Verify that the model number on your unit matches your purchase order Confirm that the ratings label on the unit matches or is greater than the motor s HP and current rating FLA SF 2 2 Initial Unit Inspection Make a complete visual check of the unit for damage which may have occurred during shipping and handling Do not attempt to continue installation or start up the un
112. tents Continued PAGE 5 1 9 RTD Option Configuration Setpoint Page 9 32 5 1 10 Password Level Configuration Setpoint Page 10 33 5 1 11 Communication Setpoint Page 11 33 5 1 12 System Setpoint Page 12 33 5 1 13 Calibration and Service Setpoint Page 13 33 5 2 Setpoints Menu and Parameter 34 61 SP A Basic GohfigutratloDis ah 34 35 SP 2 Starter Gonfigutatiorns s tete t AU E 36 40 Fig SP2 3 Example of Switching from Jog to Start Ramp 1 Type 37 Fig SP2 4A Power AL EK LUE Las 39 SP 3 Phase amp Ground 41 43 Fig SP3 5 Overcurrent Trip Delay 41 SP 4 Relay Assignments inaani aaa ae AG e e eee 44 45 SP 5 Relay Gonfiguration ae RID eee be al ce eue DR dde 46 5 6 User I O Configuration ainda lege da Dae DLE dx Eng e za odd 47 50 SP 7 Custom Acceleration 51 53 SP 8 Overload Curve
113. ts Digital Input Faults are active in all modes Note The Programming Mode can only be entered from the Ready Mode Any attempt to enter data while the motor is starting or running will be blocked During programming all protection features and start command are disabled 1 5 2 Start Mode These additional protection functions are enabled when the DXT Series receives a valid Start command Phase Rotation if enabled Start Curve Acceleration Timer Phase Imbalance Short Circuit Load Pre check Toe in the Water Ground Fault Optional External Input Faults Accumulated Starting FLA Units I2t Protection Starting Overload Protection Curve Selection Thermal Capacity Note Shorted SCR and Shunt Trip protection are no longer in effect once the DXT Series goes into the Start Mode Motortronics Page 9 DXT Digital Solid State Starter User Manual 39 1250A 1 5 3 Run Mode The DXT Series enters the Run Mode when it reaches full output voltage and the motor current drops below the FLA setting motor nameplate FLA plus service factor for a pre determined period of time During the Run Mode these additional protection features are enabled Running Overload Protection Curve Selection Phase Loss Under Current Load Loss Over Current Electronic Shear Pin Jam Protection External Input Faults 1 5 4 Stop Mode Once a Stop command has been given the DXT Series protection features change depending on which Stop Mode is selected
114. urve Disabled Disabled Learn Enabled Learned Start Curve Bias 10 5 40 SP8 4 Time for Sampling 30 sec 1 300 sec Motortronics Inc Page 31 DXT Digital Solid State Starter User Manual 39 1250A 5 1 9 RTD Option Configuration Setpoint Page 9 Setpoint Security Level Factory Setting Page Page 9 RTD Configuration Level 3 Password Protected Description Default Section Use NEMA Temp for RTD Values Disabled Enabled or Disabled SP9 1 of RTD Used for Stator 4 0 6 SP9 2 RTD Voting Disabled Enabled or Disabled SP9 3 Stator Phase 1 Type Off 41 100 100 RTD 1 Description STATOR 5 1 User defined Up to 15 Characters Stator Phase A1 Alarm Level Off 0 240C 32 464F Off Stator Phase A1 Trip Level Off 0 240C 32 464F Off Stator Phase A2 Type Off Same as Stator Phase A1 RTD 2 Description STATOR PHAS A2 User defined Up to 15 Characters Stator Phase A2 Alarm Off 0 240C 32 464F Off Stator Phase A2 Trip Level Off 0 240C 32 464F Off Stator Phase B1 Type Off Same as Stator Phase A1 RTD 3 Description STATOR PHAS B1 User defined Up to 15 Characters Stator Phase B1 Alarm Level Off 0 240C 32 464F Off Stator Phase 1 Trip Level Off 0 240C 32 464F Off Stator Phase B2 Type Off Same as Stator Phase A1 RTD 4
115. xample on site generator power or utility lines with limited capacity The torque is increased until the motor current reaches the pre set Current Limit point and it is then held at that level Current Limit overrides the ramp time setting so if the motor has not accelerated to full speed under the Current Limit setting the current remains limited for as long as it takes the motor to accelerate to full speed When the motor reaches full speed and the current drops to running levels the DXT Series detects an At Speed condition and will close a Bypass Contactor if provided The Bypass Contactor serves to shunt power around the SCR stack assemblies to prevent heat build up NEMA12 enclosed units and combination starters due to the slight voltage drop across the SCRs At this point the DXT Series has the motor operating at full voltage just as any other starter would Motortronics Page 8 DXT Digital Solid State Starter User Manual 39 1250A Other starting methods available in the DXT Series are e Current Ramp Uses a closed loop current feedback algorithm to provide a linear current increase up to a Maximum Current level e Constant Current Current is immediately increased to the Current Limit point and held there until the motor reaches full speed Power KW Ramp Uses a True RMS KW feedback PID loop to provide a linear increase in True RMS motor power to a maximum set KW value e Custom Curve Gives the user the ability to plot torqu
116. y the fault error while the listed LED and AUX Relay will be lit Please clear all faults before attempting to restart the unit Note If the problem persists after the fault has been cleared and all corrective actions have been taken please contact the factory for assistance Problem Short Circuit Trip Single Phase Trip Motortronics Inc CPU LCD Display LED EN Possible Cause Solutions Short circuit or ground Locate and remove short or fault in motor cabling ground Phase Loss Repair cause of phase loss Branch circuit protection Verify correct sizing of branch not correctly sized circuit protection Trip AUX1 Remove power and replace Faulty main circuit board main circuit board Remove power and test Faulty SCRs SCR s Refer to Section 7 1 1 for the SCR testing procedure Single phase incoming Correct problem with incoming power power Remove power and test Faulty SCRs SCR s Refer to Section 7 1 1 for the SCR testing procedure Environment Temperature over 122 Place unit in environment Trip AUX1 ambient temperature temperature less than 122 F for chassis units or over 104 F ambient temperature for enclosed version for panel version or less than 104 F for enclosed version Bypass failed to close Check bypass contactor and wiring The At Speed delay is incorrectly programmed Reprogram back to factory default value Page 73 DXT Di

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