LKAT Plus BI-DIRECTIONAL HIGH CURRENT
Contents
1. Example Old Vstpr 7M Old Trip Current New Trip Current 80kA 7V X 80kA 8V New 6 2 Trip Configuration Details Trip Circuit Vstpr Location Coarse Adjust Fine Adjust 1 TP2 Set 1 Main Main al Fine 2 TP2 Set 2 PE PE ses Fine 3 TP3 Set 3 PE PE Sets Fine Use P1 2 for zero volt reference circuit common for voltage measurements for trip setpoint configuration Optional NOTE The LKAT Plus is supplied with trip setpoints configured as specified in the LKAT Plus Worksheet If the trip setpoints are reconfigured in the field the customer must realize that the trip setpoints shown on the LKAT Plus Metering Unit nameplate will no longer be correct In this case DynAmp suggests that the nameplate be changed to reflect the new trip setpoint following reconfiguration The nameplate location and suggested method for documenting new trip setpoint s are shown in the figure below Figure 6 3 Nameplate 2012 DynAmp LLC 043636 Q E LKAT Plus Metering Unit mp Serial No 08050015 Metering Unit No 043696k System No 045125 Main Output Range 0 50 Output 12 4 20 Trip Stpti NOT USED Main Output Range Output Trip Stpt2 Trip Stpt2 NOT USED NOT USED NOT USED NOT USED Page 28 Installation Operation and Service Manual LKAT Plus 6 10 EARTH GROUNDING2. marker Keep the Silicone RTV on the outside of the elbow cavity There must be sufficient Silicone RTV adhesive to seal any gap between the sensor head halves 5 Position the two L shaped head halves around the bus and the fiberglass channels Mate the two halves pressing them together until the tubes are firmly seated in the elbows 6 Install the releasable cable ties to hold the head halves together while the Silicone RTV cures The cable ties may be removed after 24 hours 7 Route the interconnection cables away from the bus and other high voltages 8 Connect the power cable assembly to appropriate power source and LKAT Plus metering unit 9 The Silicone RTV takes approximately 24 hours to cure After Silicone RTV has cured the plunger tension may be adjusted if needed Use the 1 8 hex wrench supplied with the system for this purpose 5 5 SYSTEM CHECKOUT Recheck all wiring connections against the drawings to ensure proper installation Energize the LKAT Plus system Confirm that the green status LEDs are illuminated If D6 AD LED lights red skip to Troubleshooting an Accuracy Diagnostics Fault Indication in the Theory of Operation section of this manual With the bus energized the metering unit digital display should indicate the primary current in units within 2 The current loop should produce an output signal of 20mA 50 75 at full scale bus current with allowance for any bias offset
3. 28 TABLE SPARE PARTS LIST erdt ll eat ils ab T roti ceti ia za TA 32 TABLE S T TECHNICAL BULLETINS IST dii n e ote t oto ood itii 35 TABLE 9 T DRAWING 37 2012 DynAmp LLC Page xiv 043636 Q Installation Operation and Service Manual LKAT Plus 1 SAFETY 1 14 OVERVIEW The measuring head is designed to be installed on high voltage bus bars All interconnection cables must be safely routed away from bus bars and high voltages Do not allow any interconnection cable to contact bus bars or high voltages Ignoring the installation precautions and warnings can result in severe personal injury or equipment damage The following are general guidelines to be followed during installation operation and service of the metering unit and measuring head Allinstallation maintenance and service must be performed by qualified technicians who are familiar with the warnings and instructions of this manual Always follow all local and plant safety procedures enclosure cover must remain closed at all times during operation to ensure safety of personnel Only authorized personnel or technicians should be allowed to open and service the unit Replace fuse with correct type size and value Refer to the servicing instructions or spare parts list for more information on replacement fuses Do not bypass the fuses or modify the electr
4. DC Bias Comparator 52252457774 15Vdc POWER SUPPLY PCB Metering Unit PCB Assy Note This PCB is very Display Gain amp similar to the Main PCB Zero Adj RMStoDC Digital Display PROTECTION 19 89 EXTENSIONS PCB OPTIONAL Display PCB Optional Figure 6 1 Block Diagram of the LKAT Plus System 6 3 SYSTEM FUNCTIONAL DESCRIPTION The flux density associated with the primary current is sensed by arrays of Hall ICs in the sensor head The outputs of these devices are summed and filtered then transmitted to the metering unit where these signals are dc biased and scaled The Accuracy Diagnostics status LEDs and relay contacts are driven by a signal input that compares the various Hall groups with voltage setpoints When the Hall group signal exceeds the reference the green 2012 DynAmp LLC Page 22 043636 Q Installation Operation and Service Manual LKAT Plus LED will go out and the red LED will illuminate The relay coil will de energize under the same conditions The Trip Setpoint LEDs and relay contacts operate in a similar manner Main PCB LED D6 is a RED GREEN the Accuracy Diagnostics status LED This LED indicator and Main PCB relay CR2 contacts may be used to monitor the following conditions Head imbalance e Power supply failure Head disconnected Sensor electronics failur
5. Setpoint using R34 coarse and R47 fine Calibrate the RMS Display PCB Assembly Select Decimal Point position Select DPM Mode Select RMS Signal Conditioning Options using SW1F amp SW 1 6 7 amp 8 Select Input Scale Factor using SW1E SW 1 5 Select Input Attenuation using SW1A B C amp D SW1 1 2 3 amp 4 e Set DPM Gain fine using R12 6 9 FIELD CONFIGURATION OF TRIP SETPOINTS Trip setpoints may be re configured on site for any level between 5 and 100 of full scale The trip polarity may also be re configured on site However the Accuracy Diagnostics trip setpoint should not be adjusted without consulting the factory Refer to assembly drawings for the Main pc board and PE pc board optional included at the end of this manual To change trip polarity adjust SW3 1 SW3 2 according to the table on the assembly drawing The trip setpoint is proportional to the current where the trip will occur Trip Current from LKAT Plus Metering Unit nameplate To configure the trip setpoint Refer to Table 6 2 Trip Configuration Details Adjust coarse and fine potentiometers to produce calculated New Vsrpr 2012 DynAmp LLC Page 27 043636 Q Installation Operation and Service Manual LKAT Plus Measure the existing setpoint voltage V stpt use the equation below to calculate the new setpoint voltage Old Vsrer New Vstpr Old Trip X New Trip Current Current
6. 2012 DynAmp LLC Page 15 043636 Q Installation Operation and Service Manual LKAT Plus Photocopy the appropriate LKAT Plus Diagnostic Measurements Forms Form 1 is for diagnostic measurements at zero bus current with the sensor head on or off the bus Form 2 is for diagnostic measurements with the sensor head installed on the bus with the bus energized Follow the directions to measure and record necessary information NOTE These forms are intended to help keep accurate records of LKAT Plus functional tests This information may prove valuable in the event of a malfunction These measurements do not constitute system calibration Space is provided for the recording of three sets of readings Voltages may vary slightly with temperature extremes System performance will typically remain within nominal specifications when measured levels fall within the acceptable limits shown on the forms Levels must be measured and recorded under test conditions shown on the forms The metering unit cover must be open during system checkout as all measurements are made inside metering unit on Main pc board terminal blocks The cover should remain firmly closed during normal operation Always complete these forms before contacting the factory 2012 DynAmp LLC Page 16 043636 Q Installation Operation and Service Manual LKAT Plus Table 5 1 Plus Diagnostic Measurements Form 1 Zero Primary Current LKAT Plus Diagnostic
7. PE pc board assembly e Display pc board assembly configurable for DC or True RMS readings One or both of these pc board assemblies may be added to an LKAT Plus Metering Unit in the field It is not mandatory that they be factory installed and or calibrated The optional pc board assemblies may be calibrated on site using the LKAT Plus Main Output as the reference measurement 3 4 INDICATORS AND OUTPUTS The LKAT Plus System metering unit includes several visual indicators These include e Accuracy Diagnostics operational status LEDs green OK red system problem see Section Theory of Operation e Overcurrent Reverse Current Trip status LEDs green measured current less than setpoint red overcurrent reverse trip The overcurrent trip setpoint s may be configured to monitor forward or reverse current e Optional Illuminated LCD digital display of measured current Available via the metering unit output cable e Isolated signal output proportional to bus current being measured This output may be configured specified for various zero and full scale values e Normally open and normally closed relay contacts indicate operational status same as green and red LEDs For failsafe operation the relay coil is energized when unit is functioning properly e Normally open and normally closed relay contacts indicate overcurrent trip status same as green and red LEDs For failsafe operation the relay coil is energized
8. Reverse Current Status LEDs Trip Red LED indicates measured current exceeds Trip Setpoint 2012 DynAmp LLC Page 9 043636 Q Installation Operation and Service Manual LKAT Plus Table 4 1 LKAT Plus System Specifications Continued STATUS INDICATORS PROTECTION EXTENSIONS PC BOARD ASSEMBLY Optional Overcurrent Reverse Current Trip Setpoint Independent Continuously variable from 5 Qty 2 Field configurable to 100 of full scale Overcurrent Reverse Current Status Relay Relay coil de energizes when measured Form C contacts Normally Open amp Normally current exceeds Trip Setpoint Closed Rating 7 Amps 30 Vdc Green LED indicates operation OK No Trip Overcurrent Reverse Current Status LEDs Red LED indicates Measured Current exceeds Trip Setpoint 3 Digit Green LCD 2 Full scale or 110 to 264Vdc Unit Low Voltage Circuit Voltage Circuit Unit Low Voltage Circuit Ambient Temperature Range of Metering Unit 10 C to 50 C Location Operational 14 F to 122 F Ambient Temperature Range of Measuring 20 C to 80 C Head Operational 4 F to 176 F Ambient Temperature Range of System 40 to 70 C Storage 40 to 158 F Humidity head and metering unit 85 non condensing 2012 DynAmp LLC Page 10 043636 Q Installation Operation and Service Manual LKAT Plus Table 4 1 LKAT Plus System Specifications Continued PHYSICAL Measuring Head Weight 2 to 8 Ibs 1 t
9. Many local electrical codes require non conducting metal parts of electronic equipment to be connected to Earth Ground for safety reasons This connection is intended to prevent electrical shock if the Input Mains Line voltage is accidently connected to normally non conducting metal parts of the equipment In a failure where the chassis is accidently connected to Mains Line voltage current will flow via the connection to Earth This in turn will trip the protective circuitry on the Mains Line Here is a detailed description of the Earth Ground connection path See Figure 6 4 1 The BLK and WHT wires of the Input Power Cable Assembly are connected by the customer to Mains Power The GRN wire may or may not be connected to Earth Ground depending on the local electrical code where the LKAT equipment is installed 2 is the connector end of the Input Power Cable Assembly CONN4F contacts are connected BLK Contact A LINE or VDC WHT Contact C NEUTRAL or VDC and GRN Contact E Earth Ground 3 mates with the front side of CONNAM flanged connector on the Metering Unit Enclosure 4 On the back side of CONNAM its contacts terminate one end of the Input Power Harness 5 Plug P5 terminates the other end of the Input Power Harness P5 4 is the Earth Ground conductor Plug P5 mates with Receptacle P5 on the Power Supply PC Board Assembly Receptacle P5 is soldered to copper foil traces on the Powe
10. Measurements Form Zero Primary Current Instructions 1 Assure that the metering unit is energized and both head halves are connected 2 Assure that head is off bus or that bus is de energized 3 Measure and record the information below make additional copies of this form as needed TEST CONDITIONS ZERO PRIMARY CURRENT Head may or may not be installed on bus LKAT Plus SYSTEM must be ENERGIZED for AT LEAST ONE HOUR DATE DATE DATE MEASURE DMM DMM ACCEPTABLE at at RANGE 5V 5V supply ia diac 0 5V 15V 15V supply Ded Fist 0 5V 15V 15V supply xn ius 0 5V Input 0V M P1 1 P1 2 5 Input 0V A2 P1 3 P1 2 5mV Input 0V B1 P2 1 P2 2 5mV Input 0V B2 P2 3 P2 2 5 Output Current P3 1 P3 2 10 2V Loop max Burden at Full Scale Serial Number 2012 DynAmp LLC Page 17 043636 Q Installation Operation and Service Manual LKAT Plus Table 5 2 Plus Diagnostic Measurements Form 2 Energized Primary Bus LKAT Plus Diagnostic Measurements Form Energized Primary Bus Instructions 1 Assure that the metering unit is energized and both head halves are connected 2 Assure that head is on bus and that bus is energized 3 Measure and record the information below make additional copies of this form as needed 4 Record Serial Number and Current Loop Burden Resistance Ohms TEST CONDITIONS ENERGIZE
11. RevP Table 4 1 MDCRO042 Added Technical Bulletin list ganz ECR1765 Remove Bus Analysis block Figure 5 1 529 Revi General Guidelines for Locating Measuring Heads 0912 2012 DynAmp LLC Page xi 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page xii 043636 Q Installation Operation and Service Manual LKAT Plus TABLE OF CONTENTS Paragraph Title Page 1 SAFETY 1 151 OVERVIEW RR 1 2 HANDLING AND STORAGE 3 3 DESCRIPTION 5 aa 5 2 2 MEASURING HERD dire ede rte dtes Rhe e ue p E EE 5 3 39 METERING UNIT roit or e ees re ehe vet eva ore aces red even Dav el 5 3 4 INDICATORS AND 0 6 3 5 INTERGONNECTION GABEESZ LLL yu u QM u A Mu aM Uu C isuu 7 4 SPECIFICATIONS 9 5 INSTALLATION 13 5 1 HANDLING PRECAUTIONS wiv iter uu u l e entere tnter dete te tes 13 5 2 INSTALLATION CONSIDERATIONS a 0 13 5 3 OFF BUS FUNCTIONAL CHECK Optional eeeeeeeeeeeeeeeeeeeee nennen 14 5 4 HEAD INSTALDLEATIGON te ham haku Dau rete ees 14 5 5 SY STEM CHECKOUT ss iir eo ette bete etr dtes 15 5 6 METERING UNIT INSTALLATION T a 19 6 THE
12. conditioning electronics The tubular enclosure is constructed of flame retardant plastic materials Insulation from the bus is provided by the homogeneous sealed construction of the head In the event that the head enclosure components become cracked the bonding fails or the weather tight seal is broken in any way a replacement head must be substituted The measuring head is not designed to be repaired LKAT measuring heads are mounted on the bus bar using fiberglass channels and spring loaded clamps All mounting hardware is supplied with each system The mounting clamps are factory installed on the measuring head The spring loaded plungers are adjusted to bus dimensions specified with each order When properly installed the mounting hardware maintains the position of the head in the event of temperature fluctuation and or bus vibration An interconnection cable assembly is integral to each half of the measuring head The standard length is 33 feet 10 meters Heads with extra long interconnection cables are also available consult the factory for details Standard head cable assemblies are terminated with keyed connectors to ensure correct hookup The interconnection cables from the head are identified as A and B Connecting head cable A to metering unit B will not result in damage to the head or electronics but may degrade the calibration accuracy of the system 3 3 METERING UNIT The metering unit is housed in a NEMA 4X encl
13. during normal operation 6 5 HEAD INTERCHANGEABILITY Measuring heads of various sizes will operate properly when connected to the LKAT Plus metering unit However the LKAT Plus system is factory calibrated as a system Asa result optimal measurement accuracy is achieved when the metering unit is connected to the head it was calibrated with and installed on the size bus bar it was designed for 6 6 TROUBLESHOOTING AN ACCURACY DIAGNOSTICS FAULT INDICATION A problem may exist when the LKAT Plus system is energized with A and B head cables connected to the metering unit and the Main AD status LED D6 illuminates RED and or Main PCB CR2 status relay coil de energizes This is true whether or not the measuring head is installed on the bus The following table is intended to help the user determine and hopefully eliminate the cause of the fault 2012 DynAmp LLC Page 23 043636 Q Installation Operation and Service Manual LKAT Plus Table 6 1 Troubleshooting an Accuracy Diagnostics Fault Indication LO oleo sg zt 85 Possible problem Action Check s8 829 33 OFF OFF Closed X X No input power Verify input power connection OFF OFF Closed X X DC power supply Verify DC power on main pcb OFF ON Closed X X Head halves Verify head interconnections at metering disconnected unit OFF ON Closed X Head imbalanc o position of head for green ON red Sdn
14. ensure safety of personnel The cover may be opened using a screwdriver however only authorized personnel or technicians should be allowed to open and service the unit DynAmp LLC does not assume liability for the customer s failure to comply with the rules and requirements provided in this manual This equipment is designed to be connected to hazardous electric voltages Ignoring the installation precautions and warnings can result in severe personal injury or equipment damage HAZARDOUS To avoid the risk of electrical shock or fire the safety instructions and guidelines VOLTAGE in this manual must be followed The electrical specifications must not be exceeded and the unit must be installed according to directions provided This equipment is intended for indoor or outdoor use The ambient temperature must not exceed 80 C for the measuring head and 50 C for the electronics For mounting considerations that fall outside the recommended specifications provided in this manual the factory should be contacted for approval INSTALLATION This unit is rated for installation category IIl and pollution degree 2 Symbol Identification General definitions of safety symbols used on equipment and manual A Caution Warning Refer to accompanying documents for instructions C The CE mark proves the compliance of the equipment with the requirements of the directives 2012 DynAmp LLC Page vii 043636 Q Installation Operation and Se
15. gt DynAmp LKAT Plus BI DIRECTIONAL HIGH CURRENT MEASUREMENT SYSTEM Installation Operation and Service Manual Manual Item No 043636 Rev Q DynAmp LLC 3735 Gantz Road Phone 1 614 871 6900 www dynamp com Grove City Ohio 43123 USA Fax 1 614 871 6910 Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page ii 043636 Q Installation Operation and Service Manual LKAT Plus DynAmp LLC WARRANTY Items and components manufactured by Seller for permanent installation are warranted for two 2 years from the date of shipment Items and components manufactured by Seller for portable and temporary use in more than one location are warranted to be free from defects in material and workmanship for a period of eighteen 18 months from the date of shipment Items and components not manufactured and resold by Seller are warranted by their manufacturer Warranty repair shall be at DynAmp s option in the form of repair or replacement of the defective items or components Concerning warranty repairs DynAmp LLC will be responsible for DynAmp provided time material and transportation costs shipping or travel Actual method of warranty repair correction will be determined by DynAmp LLC at DynAmp s sole option Such warranty repair shall constitute a fulfillment of all DynAmp LLC liabilities in respect to said items and components I
16. on a running horizontal bus the corner boxes should be located beneath the bus This reduces chances of ingress by pollutants and minimizes heating of the head electronics by the bus For rising vertical busses the corner boxes may be located on either side of the bus depending on mechanical and thermal considerations The head should be mounted so conventional to current flows in the direction of the arrow on the sensor head The following tools and materials are required for installation Materials marked with an asterisk are included with each LKAT Plus System order 34 864mm Releasable Cable Ties Silicone RTV adhesive sealant 1 8 3mm hex wrench Drill drill bits mounting hardware screwdrivers wrenches etc Cable puller cable ties ladder etc The following is the recommended sequence for installing the measuring head 1 Determine the position where the measuring head will be installed Bus bar s should be free from grease and dust for the best adhesion of the LKAT fiberglass mounting channels to bus bar s 2 Connect the head cable assemblies to the metering unit 3 Remove the backing from the adhesive foam strips on the fiberglass mounting channels Position the mounting channels to the bus in the desired location 4 Squeeze a 1 2 6 5mm continuous bead of silicone RTV adhesive around the elbow and tube seam indicated by the yellow HEAD SPLITS
17. when measured current is less than overcurrent trip setpoint s The table below lists the features associated with the Main and PE pc board assemblies Table 3 1 Main and PE PC Board Assembly Features Main PC Board PE PC Board Assembly Assembly Isolated Output 1 1 Operational Status LEDs amp Relay Contacts 1 0 Overcurrent Reverse Trip Status LEDs amp Relay 4 2 Contacts 2012 DynAmp LLC Page 6 043636 Q Installation Operation and Service Manual LKAT Plus Each isolated output features 450Vrms working galvanic isolation e Configurable scaling e Configurable bias Each Overcurrent Reverse Current Trip Setpoint includes e Selectable Forward Reverse protection Independently adjustable Trip Setpoint field configurable Status LEDs Status Relay Contacts Field calibration of LKAT Plus Systems requires use of a reference current transducer with calibration accuracy of 0 1 full scale or better Contact DynAmp LLC for calibration of the LKAT Plus System Refer to Maintenance and Spare Parts section for more information 3 5 INTERCONNECTION CABLES The LKAT Plus system is supplied with two cable assemblies in addition to those connected to the measuring head The power input cable assembly is 33 feet 10m in length A keyed circular connector terminates one end The other end is unterminated for connection to the power source by the user during installation The sys
18. 3 02 29 Field Configuration of Trip Setpoints 18 19 B Changed power supply tolerance to 0 5v Changed 06 02 acceptable differences to A1 vs A2 and B1 vs B2 3 7 9 C Section 2 2 paragraph deleted term molded on 02 03 changed Section Table 3 1 Temperature sensitivity for cable lengths added Note 1 28 29 D Added Remove tape seal from switch SW1 and SW2 if 06 03 necessary 7 E Add Minimum Load Resistance 250 in Section III 08 03 21 26 F Changed contact status open to closed and closed to 09 03 open in Tables 4 3 and 5 1 12 15 21 G Updated Installation Section pages Tables 4 1 amp 4 2 10 03 26 30 removed Table 4 3 updated 5 6 Troubleshooting AD fault and Spare Parts List 6 1 V vii 1 H Updated with CE Safety section mains wire 04 04 5 8 Description 2 4 working voltage from 500V to 450V Specifications changed isolation to working voltage all Rev I Update to DynAmp LLC 11 04 11 12 Rev J Update Installation Consideration 4 2 IP65 rating 04 05 information 8 Rev K Update Specifications Table 3 1 Ambient Temperature 06 05 Range Storage v 1 30 RevL Update fuse precautions per ECR 1304 07 06 all Rev M Update per ECR 1511 ECO 3216 Specification label 10 09 PAR 10245 Handling amp Storage ECR 1440 Calibration Intervals New Manual Format 11 Rev N MDCR 0032 Figure 4 1 08 10 34 Rev O ECR1639 Correct Item number in table 7 1 05 11 ECR 1692 ECO 3268 Earth Ground Connections Fix 92935
19. D PRIMARY BUS LKAT Plus SYSTEM must be ENERGIZED for AT LEAST ONE HOUR DMM DMM ACCEPTABLE DATE DATE DATE MEASURE at at RANGE IIl s II ENS 5V 5V supply ma ETE 0 5V 15V 15V supply oe PAPE 0 5V 15V 15V P4 P4 5 supply 0 5V Within peut P1 1 P412 25mV of 1 Input 2 Within P1 3 1 2 25mV of 2 Input A1 Within Input An P2 1 P22 25mV of B1 Input B2 Within pua P2 3 P22 25mV of B2 Input B1 Output Current Loop P3 1 P32 22 at Full Scale e Serial Number Nominal Current Loop Burden Resistance Ohms 2012 DynAmp LLC Page 18 043636 Q Installation Operation and Service Manual LKAT Plus 5 6 METERING UNIT INSTALLATION The location of the metering unit should be determined by the following factors 1 Ambient air temperature must stay in the range of 10 C to 50 C at all times 2 The location should not be exposed to direct sunlight 3 The location should be within reach of the head cables supplied with the system Standard head cable length is 33 feet 10 meters Extra long head cables may also be ordered for special applications 4 Route interconnection cables away from bus and other high voltages Refer to Metering Unit Outline amp Mounting drawing at the end of this manual Anchor the cabinet in the desired location after ensuring adequate cable reach Refer to the LKAT Plus System Wiring Diagram The outpu
20. IDE VIEW Figure 6 4 Metering Unit Earth Ground Connections 2012 DynAmp LLC Page 30 043636 Q Installation Operation and Service Manual LKAT Plus 7 MAINTENANCE amp SPARE PARTS 7T 1 PERIODIC MAINTENANCE As is true with any electronic system proper maintenance will tend to prolong the service life DynAmp LLC recommends the following program be performed at the recommended interval to prevent or detect damage to the LKAT Plus System and to ensure reliable performance Always use appropriate measures to correct any problems found Following the suggested maintenance schedule may assist in early diagnosis of problem s to minimize repairs and down time IMPORTANT NOTE If Main pc board LED D6 AD Status LED is illuminated RED and or the status relay coil de energizes a fault condition may exist in the LKAT Plus electronics When this occurs the system may require immediate attention Refer to Troubleshooting Fault Indication in the Theory of Operation section of this manual 7 2 ANNUAL MAINTENANCE Refer to the Calibration section of this manual for calibration intervals If possible perform the steps described in section titled SYSTEM CHECKOUT DURING TEMPORARY INSTALLATION at least once per year to verify performance of the LKAT Plus system This may help to prevent or detect damage to the system and to ensure reliable performance Use appropriate measures to correct any problems found If LKAT Pl
21. LLC Page 32 043636 Q Installation Operation and Service Manual LKAT Plus 7 4 SERVICE ASSISTANCE For further assistance contact DynAmp Customer Support at Americas Telephone 1614 871 6900 Fax 1 614 871 6910 8 00 to 5 00 PM USA Eastern Time From first Sunday November to second Sunday March 13 00 GMT to 22 00 GMT From second Sunday in March to first Sunday in November 12 00 GMT to 21 00 GMT Europe Telephone 41 22 706 1446 Fax 41 22 706 1311 8 30 AM to 5 00 PM Central European Time From last Sunday in October to last Sunday in March 7 30 GMT to 16 00 GMT From last Sunday in March to last Sunday in October 6 30 GMT to 15 00 GMT After Hours Critical Service Emergency Telephone 1 614 871 6906 5 00 PM to 8 00 AM USA Eastern Time From first Sunday in November to second Sunday in March 22 00 GMT to 13 00 GMT From second Sunday in March to first Sunday in November 21 00 GMT to 12 00 GMT Central e mail hel dynamp com DynAmp web www dynamp com 2012 DynAmp LLC Page 33 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 34 043636 Q Installation Operation and Service Manual LKAT Plus 8 TECHNICAL BULLETINS Table 8 1 Technical Bulletins List NUMBER SUBJECT TITLE DESCRIPTION Non Failsafe Converting LKAT Alarm Relay Contacts to Non Failsafe 129191 Operation Operation 2012 DynAmp
22. LLC Page 35 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 36 043636 Q Installation Operation and Service Manual LKAT Plus 9 DRAWINGS Table 9 1 Drawing List DRAWING TITLE NUMBER Wiring Diagram LKAT Plus System Wiring Assembly LKAT Plus Metering Unit Wiring Harnesses Assembly LKAT Plus Metering Unit Assembly LKAT Plus Main PCB Assembly LKAT Plus Protection Extensions PCB Assembly LKAT Plus RMS Display PCB Assembly LKAT Power Supply PCB Clamp LKAT Plus Mounting Outline and Mounting LKAT Plus Sensor Head Outline and Mounting LKAT Plus Metering Unit 2012 DynAmp LLC 043636 Q 83A108582 83A108583 84B108584 75A108586 75A108587 75A108588 26B108388 75 045423 02B108390 02B108389 Page 37
23. MIRE tb bae PAGE FIGURE 4 1 LKAT PLUS FREQUENCY RESPONSE 11 FIGURE 6 1 BLOCK DIAGRAM OF THE LKAT PLUS 22 FIGURE 6 2 PLUS SYSTEM TEST SETUP 2 12 2 2 1 4 26 FIGURE 6 9 INAMEPLRTE ott aq aaa eig 28 FIGURE 6 4 METERING UNIT EARTH GROUND 8 1 30 TABLE 3 1 MAIN AND PE PC BOARD ASSEMBLY FEATURES 24 1 10 nnns 6 TABLE 4 1 LKAT PLUS SYSTEM 5 nnne nnne 9 TABLE 4 1 LKAT PLUS SYSTEM SPECIFICATIONS CONTINUED 10 TABLE 4 1 LKAT PLUS SYSTEM SPECIFICATIONS CONTINUED 11 TABLE 5 1 LKAT PLUS DIAGNOSTIC MEASUREMENTS FORM 1 ZERO PRIMARY CURRENT 17 TABLE 5 2 LKAT PLUS DIAGNOSTIC MEASUREMENTS FORM 2 ENERGIZED PRIMARY BUS 18 TABLE 6 1 TROUBLESHOOTING AN ACCURACY DIAGNOSTICS FAULT INDICATION 24 TABLE 6 2 TRIP CONFIGURATION 85
24. ORY OF OPERATION 21 0 1 GENERAL orit itecto e MI dee etd OEY k u eed 21 02 OEOPSTEGHNOEGQGY E ipte Ue fldem 21 6 3 SYSTEM FUNCTIONAL 2 2 0 0 000 0 0000000001000000000000 22 6 4 LKAT PLUS METERING UNIT 23 6 5 HEAD 23 6 6 TROUBLESHOOTING AN ACCURACY DIAGNOSTICS FAULT INDICATION 23 6 7 SYSTEM CALIBRATION OVERVIEW 24 6 8 CALIBRATION PROCEDURE aa nnns 25 6 9 FIELD CONFIGURATION OF TRIP SETPOINTS 27 6 10 EARTFEGROUNDINQ s uu au eei Ene edd re saeva ned a D deel 29 7 MAINTENANCE amp SPARE PARTS 31 7 1 PERIODIC MAINTENANCE aa snis iens sss 31 7 2 ANNUAL MAINTENANCE ne eade Aa 31 7 3 RECOMMENDED SPARE 2 002222000 0 0 0 00 0000000000000000 32 7 4 cei eee ete eo eoa E aee ERO CEP Ee 33 8 TECHNICAL BULLETINS 35 9 DRAWINGS 37 2012 DynAmp LLC Page xiii 043636 Q Installation Operation and Service Manual LKAT Plus FIGURES amp TABLES EIGUREJE T
25. and 93 68 EEC Standards to which conformity is declared Electrical Equipment for measurement control and laboratory use EMC Requirements EN61326 1997 edition including Amendment 1 1998 and Amendment 2 2001 e EN55022 1998 edition Information technology equipment radio disturbance characteristics Limits and methods of measurements EN61000 3 2 2000 edition Electromagnetic Compatibility Part 3 Testing and measurement techniques Section 2 Harmonic current emissions EN61000 3 3 1995 edition Electromagnetic Compatibility Part 3 Testing and measurement techniques Section 3 Voltage fluctuation and flicker test EN61000 4 2 1995 edition Electromagnetic Compatibility Part 4 Testing and measurement techniques Section 2 Electrostatic discharge immunity test EN61000 4 3 1996 edition Electromagnetic Compatibility Part 4 Testing and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test e EN61000 4 4 1995 edition Electromagnetic Compatibility Part 4 Testing and measurement techniques Section 4 Electrical fast transient burst immunity test EN61000 4 5 1995 edition Electromagnetic Compatibility Part 4 Testing and measurement techniques Section 5 Surge immunity test EN61000 4 6 1995 edition Electromagnetic Compatibility Part 4 Testing and measurement techniques Section 6 Conducted immunity test EN61000 4 11 1995 edition Electro
26. ant safety rules and be able to follow these The complete system should be inspected for shipping damage at the earliest opportunity Visible damage must be reported to the carrier immediately Concealed damage not evident until the system is operated must be reported to DynAmp LLC immediately NOTE It is normal to hear a slight rattling sound when the LKAT Measuring Head is subjected to vibration INSTALLATION CONSIDERATIONS 5 2 Read the following before mounting the head 1 The measuring head is designed to be installed on high voltage bus bars All interconnection cables must be safely routed away from bus bars and high voltages Do not allow any interconnection cable to contact bus bars or high voltages Ignoring the installation precautions and warnings can result in severe personal injury or equipment damage Always follow all local and plant safety procedures when the unit is to be installed on a live bus Choose a mounting location for the head where the ambient air temperature does not exceed 80 C The LKAT Plus head may be located indoors or outdoors but should be kept away from extreme heat and solvents Head installations in direct sunlight are not recommended as excessive temperature rise could result in measurement error or damage to the head enclosure If the head is to be installed in an especially harsh environment please contact the factory to discuss special requirements The head and metering
27. e e Other circuit failures causing loss of measurement accuracy Occurrence of one or more of the conditions above will deenergize CR2 relay coil changing the state of the contacts and changing the LED indication from green to red Refer to the section Troubleshooting an Accuracy Diagnostics Fault Indication in this section for more information about determining the cause and eliminating a fault condition 6 4 LKAT PLUS METERING UNIT Refer to drawings in the back of this manual The LKAT Plus metering unit consists of a universal input power supply and Main pc board mounted together on a steel U chassis Input output and power connections are made from outside the enclosure using panel mount IP65 rated military style circular connectors Wiring harnesses within the metering unit are terminated using 3 5mm and 5 08mm Eurostyle connectors Input power connects to the Power Supply pc board assembly The dc supply includes a slo blo type fuse in rush and overcurrent protection as well as MOV overvoltage clamping The power supply provides outputs of 15Vdc and 5Vdc required by the system electronics These outputs connect to the Main pc board assembly via a short wire harness Connections to the sensor head are made via the Main pc board assembly u chassis with power supply and Main pc board is mounted on a sub panel inside NEMA 4X enclosure The enclosure cover must be securely closed and cable assemblies connected at all times
28. e in industrial environments However they contain sensitive electronic and mechanical components which may be damaged and fail if not handled and stored properly All products must be handled and stored with the same care as any precision measurement instrument Severe bumps or jolts may damage internal parts and cause malfunction or premature failure DynAmp products are designed and assembled with conformal coating shock mounting and environmental seals when appropriate or when specified However this protection requires that the product must be properly installed and operational before the protection is fully functional Therefore adequate protection from humidity shock and temperature must be provided during handling and storage prior to installation The handling and storage of equipment must be sufficient to meet the storage temperature and humidity specifications of the product and to prevent any condensation or contact with water or any other liquid The storage location and container or crate must provide adequate protection from precipitation rain snow ice and direct water contact Adequate shelter must be provided to prevent the accumulation of precipitation rain snow ice and water which can lead to the deterioration or failure of shipping containers or crates and cause water ingress Storage in coastal or industrial areas subject to salt laden or corrosive air or areas of wind driven sand or other abrasive dust must be adequate
29. gor head Measure head input signals at zero bus OFF ON Closed X X E current output should be lt 5mVdc malfunction substitute known good sensor head OFF ON Closed X X Other problem Contact factory 6 7 SYSTEM CALIBRATION OVERVIEW DynAmp does not specify required intervals of calibration for its products The end user of the product is responsible for identifying the appropriate interval between calibrations The intervals should be determined based on the following factors Requirements of a Quality Management System e Accuracy and permissible limits of errors e Purpose and usage Experience with similar products e Manufacturer s recommendations e Stability of the product e Past history Other characteristics of the product Reference ISO IEC 17025 2005 General requirements for the competence of testing and calibration laboratories and Laboratory Accreditation Bureau Guidance for Documenting and Implementing ISO IEC 17025 2005 and Laboratory Guidance As a guideline DynAmp recommends a 24 month interval of calibration for all permanently installed products and a 12 month interval of calibration for all products used in portable applications The DynAmp LLC LKAT Plus Current Measurement System is factory calibrated for accuracy of 0 7596 of full scale measured current or better Calibration may be performed as e Field Calibration On Process Bus e Field Calibration On Test Bus e Fac
30. he power source to be used for this check 3 Connect the measuring head cables A amp B to the metering unit Connect the power input cable assembly to the metering unit and energize the unit 5 Observe the LEDs on the Main pc board assembly If the LEDs light green the system is functioning properly If LED D6 Accuracy Diagnostics lights red skip to Troubleshooting an Accuracy Diagnostics Fault Indication in the Theory of Operation section of this manual If LED D5 Trip 1 lights red make measurements and complete the form LKAT Plus Diagnostic Measurements Form 1 Zero Primary Current and contact the factory Refer to LKAT Plus Diagnostic Measurements Form Zero Primary Current Allow the system one hour to stabilize prior to making measurements Make measurements and record data shown on the form File the completed test form for future reference It is OK to make these measurements away from location where the LKAT Plus system will be installed but this should be noted on the form 5 4 HEAD INSTALLATION The head halves are semi permanently bonded together around the bus The measuring head is comprised of two L shaped halves Each half is identified with a serial number followed by an A or B One interconnection cable exits from each corner box on each half 2012 DynAmp LLC Page 14 043636 Q Installation Operation and Service Manual LKAT Plus When the sensor head is installed
31. ling the sensor head do not remove the seals from the exposed end of the sensor head tube Doing so may allow water or contaminants to enter the head and void IP rating and warranty 10 Measuring heads are shipped with mounting hardware installed and adjusted to the bus size specified with each order For permanent installation the head halves must be semi permanently bonded around the bus bar using Silicone RTV sealant adhesive After the bond cures the spring loaded mounting screws plungers may require adjustment for appropriate position and spring force on the bus Whenever possible the head should be installed on the longest straight run of the bus that is available in an area free of other bus structures The status LEDs and relay contacts indicate proper operation in a given head location 5 3 FUNCTIONAL CHECK OPTIONAL After unpacking the LKAT Plus system but prior to installation the following functional check of the system is recommended 1 Locate a convenient temporary power source for the LKAT Plus system This may or may not be in the location where the system will be installed The power source must be in the range 85 to 264Vac 47 to 440Hz or 110 to 264Vdc The system draws a maximum of 30 volt amperes 2 Refer to the drawing Wiring Diagram LKAT Plus System included at the end of this manual Attach a suitable connector to the unterminated end of the input power cable assembly for connection to t
32. magnetic Compatibility Part 4 Testing and measurement techniques Section 11 Voltage dips and interruptions immunity test immunity test Safety Standards EN61010 1 2001 edition Safety of Electrical Equipment Part C According to EN 61326 the manufacturer must state the degradation of performance level acceptable during immunity tests Unless other wise noted in the manual or data sheet DynAmp LLC limits degradation during immunity tests for this equipment to lt 1 FS for A criterion tests Under a small number of test conditions the visual reading of optional RMS Display PC board assembly may deviate up to 35 FS The display reading returns to specified performance when the RF disturbance is removed This performance level is acceptable according EN 61326 B criterion 2012 DynAmp LLC Page v 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page vi 043636 Q Installation Operation and Service Manual LKAT Plus Hazard Warning All installation maintenance and service must be performed by qualified technicians who are familiar with the warnings and instructions of this manual Disconnect power to the system before servicing or replacing fuses Use of the equipment in a manner not specified by the manufacturer can impair the protection provided within GENERAL The enclosure cover must remain closed at all times during operation to
33. measurement systems is often critical stocking spare parts should be given high priority Some cable assemblies for the LKAT Plus System include circular connectors Others use solder cup connectors assembled with adhesive lined shrink tubing covering the connector shell If connector s are severed from the associated cable assembly field installable replacement connectors may be purchased These connectors may also be installed after routing head interconnection cables in conduit Over molded replacement cable assemblies may be purchased for the power input and output cables Head cable connector s must be replaced by field installable type s or with a new head Refer to Spare Parts List Table 7 1 The LKAT Plus system measuring heads require special repair procedures and materials However the heads are very reliable and should require little or no repair over its service life Please refer to the nearest authorized DynAmp LLC service center for information on repairs Table 7 1 Spare Parts List DESCRIPTION QUAN Fuses 2A 250V Slo Blo 5mm x 20mm 5 per box 1 box Clamp Assembly LKAT Plus Mounting includes 2 plungers 43750 2 Plunger LKAT Plus mounting 10 28 x 1 body 1 8 hex drive 43281 2 Spare System Head amp Metering Unit calibrated as system 1 Metering Unit 43693 Head number same as original system head Disconnect power to the system before servicing or replacing fuses 2012 DynAmp
34. n no event shall DynAmp LLC be liable for consequential damages Information in this document is subject to change without notice 2001 2002 2003 2004 2005 2006 2009 2010 2011 2012 DynAmp LLC All rights reserved Reproduction for purposes other than operation and service without written permission of DynAmp LLC is strictly forbidden This manual includes detailed drawings installation operation service and maintenance Users should evaluate the information in the manual and their particular application DynAmp LLC assumes no liability for any incidental indirect or consequential damages arising from the use of this documentation While all information presented is believed to be reliable and in accordance with accepted engineering practices DynAmp LLC makes no warranties as to the completeness of the information 2012 DynAmp LLC Page iii 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page iv 043636 Q Installation Operation and Service Manual LKAT Plus The LKAT Plus Bi Directional High Current Measurement System may be used with or without the optional Protection Extensions PE and or RMS Display PC board assemblies All configurations of the LKAT Plus System conform to the latest European directives and standards concerning safety and electromagnetic compatibility Application of Council Directive s 73 23 89 336 EEC
35. n on a test bus at full scale current This requires that the LKAT Measuring Head be removed from process bus The head and associated metering unit must be returned together and should have the same serial number The signal output and input power cable assemblies need not be returned during factory calibration Specific details of factory calibration are beyond the scope of this manual 6 8 CALIBRATION PROCEDURE IMPORTANT NOTE To avoid injury and or electrical shock personnel performing calibration must review and observe all hazard warnings and safety precautions stated throughout this product manual Calibration of the LKAT Plus System is summarized below All Bias and Zero adjustments are made at zero bus current All Scaling and Gain adjustments are typically made at Full scale current Refer to pc board assembly drawings at the end of this manual for location of switches and potentiometers as well as tables listing proper switch settings Except for step 1 below each table is shown on the appropriate pc board assembly drawing Use forms shown in Tables 5 1 and 5 2 to check and record system power supply and channel voltages The Optional PE and or RMS Display pc board assemblies may be installed and calibrated in the field Use the Main pc board assembly output signal for the Reference output signal with the LKAT Plus System measuring normal bus current 2012 DynAmp LLC Page 25 043636 Q Installation Operation a
36. nd Service Manual LKAT Plus CURRENT SOURCE BUS CURRENT l DMM 1 SYNC PULSE DHM 2 01 AMMETER CIRCUIT 0 1 AMME TER OPTIONAL 65 ewe IN sync in LKAT SYSTEM UNDER TEST Figure 6 2 LKAT Plus System Test Setup Calibrate the Main PCB Current Loop Output e Set Output Bias coarse using SW4 Set Output Type using SW5 REFERENCE CURRENT SENSOR Remove tape seal from switch SW1 and SW2 if necessary Adjust Output Gain coarse using SW1 and SW2 e Adjust Output Bias fine using R42 e Adjust Output Gain fine gain using R7 e Readjust Output Bias fine using R42 if required 2012 DynAmp LLC 043636 Q Page 26 Installation Operation and Service Manual LKAT Plus Calibrate the PE PCB Current Loop Output Optional e Set Output Bias coarse using SW4 Set Output Type using SW5 Remove tape seal from switch SW1 and SW2 if necessary Adjust Output Gain coarse using SW1 and SW2 e Adjust Output Bias fine using R42 e Adjust Output Gain fine gain using R7 e Readjust Output Bias fine using R42 if required Calibrate the Main PCB Trip 1 Setpoint e Select Trip 1 Protection Polarity using SW3 e Adjust Trip 1 Setpoint using R33 coarse and R46 fine Calibrate the PE PCB Trip 2 amp 3 Setpoints e Select Trip 2 Protection Polarity using SW3 e Adjust Trip 2 Setpoint using coarse and R46 fine e Select Trip Protection Polarity using SW3 e Adjust Trip
37. o 4 kg Metering Unit Weight 8 Ibs 4 kg Head Interconnection Cables 2 Standard Length SEE IUM Head Interconnection Cables 2 Custom Length Note 1 Signal Output Cable 1 100 ft 30 m Power Input Cable 1 33 ft 10 m Environmental rating Head Metering Unit and 65 Interconnection Cables Note 1 For head interconnection cable lengths exceeding 20m the temperature sensitivity increases 0 02 C per 10m additional cable length Normalized LKAT Bandwidth E c 22 m p m 20 nS 5 40 0 01 O 1 1 10 100 Normalized Frequency f fc fc 2112 4x106 A s IFS A F S Bus Current kA 5 to 50 60 70 80 90 100 Corner Frequency kHz 2 248 1 873 1 606 1 405 1 249 1 124 Figure 4 1 LKAT Plus Frequency Response 2012 DynAmp LLC Page 11 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 12 043636 Q Installation Operation and Service Manual LKAT Plus 5 INSTALLATION 5 1 HANDLING PRECAUTIONS LKAT Plus systems should be handled with the same care as any precision measuring instrument Severe jolts or bumps to the head or metering unit may cause movement of internal parts and possibly a malfunction Personnel involved in the installation should be familiar with the technical terms warnings and instructions in this manual and all pl
38. onics Disconnect power to the system before replacing fuses Failure to follow these instructions will result in intermittent operation and premature failure and will void the warranty Service must be performed by qualified technicians only If use of an oscilloscope becomes necessary during servicing either the scope must be floating and ungrounded or differential probe s must be used The metering unit is isolated from the mains via the power transformers If a grounded scope is used a hazardous condition is created since current will flow through the probe to ground Units are not intrinsically safe Do not place in explosive atmospheres Use of the equipment in a manner not specified by the manufacturer can impair the protection provided within e The mains wiring should be sized 18AWG 1mm or larger and have an insulation rating of 1000Vac and 80 105 C temperature rating Ifa binding screw is used for the mains earth connection the binding screw must be size M4 No 6 or larger DynAmp LLC does not assume liability for the customer s failure to comply with the rules and requirements provided in this manual 2012 DynAmp LLC Page 1 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 2 043636 Q Installation Operation and Service Manual LKAT Plus 2 HANDLING AND STORAGE DynAmp products are engineered and manufactured for us
39. osure The enclosure cover must remain closed during normal operation The Metering Unit is rated IP65 which stipulates the following characteristics e Protection from electrical shock as hazardous voltages are inaccessible e Limited ingress of dust into the enclosure e Limited ingress of water into the enclosure via dripping spray or jets from any direction The outside of the metering unit enclosure includes four receptacles for external connection to the measuring head the metering unit outputs and the input power When properly mated with the associated cable assembly these connectors are also rated IP65 External power for the metering unit is universal input type 85 to 264Vac 47 to 440Hz or 110 to 264Vdc Wiring changes are not required for any supply voltage in this range Burden on the supply circuit will not exceed 30VA All LKAT Plus metering units include power supply and Main pc board assemblies one each These are mounted on a steel chassis mounted on a steel panel housed in the enclosure 2012 DynAmp LLC Page 5 043636 Q Installation Operation and Service Manual LKAT Plus The metering unit enclosure cover is made of clear polycarbonate This allows the user to view various LED or LCD status indicators For more information refer to the Theory of Operation section of this manual There are two optional pc board assemblies that may be added to the LKAT Plus metering unit e Protection Extensions
40. r Supply PC Board Assembly 8 The copper trace connected to P5 4 makes electrical contact with the steel standoff inserts of the steel PCB mounting bracket 9 The PCB mounting bracket makes electrical contact to the metering unit steel panel via the 4 steel mounting screws used to secure the PCB mounting bracket to the panel IMPORTANT NOTE There is no electrical connection from any part of the LKAT Main PCB or its optional daughter PCBs to Earth Chassis ground or the steel PCB mounting bracket or panel The use or non use of the Earth Ground provision does not have any impact on the performance of the LKAT system 2012 DynAmp LLC Page 29 043636 Q Installation Operation and Service Manual LKAT Plus METERING UNIT WITH COVER REMOVED FRONT VIEW ze SIDE VIEW PAN HEAD SCREW ZINC PLATED STEEL TUER OUTPUT TH GROUND CONTACT NOTE 3 POSITION P5 4 EARTH GROUND NOTE 5 CONN4M NOTE 3 amp 4 85 264V 47 440 2 DC 110 264V 30VA POWER RECEPTACLE WIRING Tm PHASE k NEUTRAL E ve INPUT POWER HARNESS PLUG amp RECEPTACLE 5 NOTE 4 NOTE 5 amp 6 STEEL STANDOFF amp 62 METERING UNIT INSERTS ENCLOSURE NOTE 8 CONN4F NOTE 2 CUSTOMER CONNECTION w u GRN NOTE 1 INPUT POWER CABLE ASSEMBLY ZINC PLATED STEEL PCB MOUNTING PAN HEAD SCREW BRACKET STEEL NOTE 8 METERING UNIT PANEL STEEL NOTE 9 S
41. rvice Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page viii 043636 Q Installation Operation and Service Manual LKAT Plus DynAmp LLC Customer Support For further assistance contact DynAmp Customer Support at Americas Telephone 1 614 871 6900 Fax 1 614 871 6910 8 00 AM to 5 00 USA Eastern Time From first Sunday in November to second Sunday in March 13 00 GMT to 22 00 GMT From second Sunday in March to first Sunday in November 12 00 GMT to 21 00 GMT Europe Telephone 41 22 706 1446 Fax 41 22 706 1311 8 30 AM to 5 00 PM Central European Time From last Sunday in October to last Sunday in March 7 30 GMT to 16 00 GMT From last Sunday in March to last Sunday in October 6 30 GMT to 15 00 GMT After Hours Critical Service Emergency Telephone 1 614 871 6906 5 00 PM to 8 00 AM USA Eastern Time From first Sunday in November to second Sunday in March 22 00 GMT to 13 00 GMT From second Sunday in March to first Sunday in November 21 00 GMT to 12 00 GMT Central e mail hel dynamp com DynAmp web www dynamp com 2012 DynAmp LLC Page ix 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page x 043636 Q Installation Operation and Service Manual LKAT Plus REVISION PAGE Page Change Reason For Revision Date all Rev NEW 09 01 4 5 7 8 A Minor changes updated Tables 3 1 added section 5 9 0
42. t cable assembly consists of 20AWG twisted pair cable 8 pairs with 17 one contact position in output connector is unused position circular connector on one end and stripped tinned wires on the other end The twisted wire pairs are jacketed with black and white PVC Each pair has the pair number imprinted on the jacket Connect the output cable assembly wires to the appropriate points in the process electronics system 2012 DynAmp LLC Page 19 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 20 043636 Q Installation Operation and Service Manual LKAT Plus 6 THEORY OF OPERATION 6 1 GENERAL The LKAT Plus system uses open loop open path OLOP technology to convert the magnetic field associated with a current carrying conductor into an isolated milliampere current loop output This output is scaled to be proportional to the primary conductor current In addition a local digital display of the primary bus current in kiloAmperes is visible when the optional RMS Display pc board is added to metering unit The measurement head is a sealed unit and is not designed for repair in the field However a working knowledge of the LKAT Plus system theory of operation will help facilitate timely and accurate diagnosis in the event of problems 6 2 OLOP TECHNOLOGY The term open loop means that the magnetic circuit does not generate an opposing magnetic field
43. tem output cable assembly is 100 feet 30m in length A keyed circular connector terminates one end The cable is a 10 conductor type however only 5 of the 10 conductors are used The unused conductors may be trimmed flush to cable jacket The user connects this cable from the metering unit to the appropriate inputs during installation 2012 DynAmp LLC Page 7 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 8 043636 Q Installation Operation and Service Manual LKAT Plus 4 SPECIFICATIONS Table 4 1 LKAT Plus System Specifications ANALOG SIGNAL OUTPUT MAIN amp PROTECTION EXTENSIONS Contact factory for Full scale measuring range gt 100 Full Scale Protection Range PE Output 5kA to 200 0 75 full scale 20mA 1 Volt or 10V Full Scale 5000 TAR Response Time ta lt 50 us 500 A 10 0077 STATUS INDICATORS MAIN PC BOARD ASSEMBLY Indicates proper operation or operational Normally Open amp Normally Closed Contacts problem Green LED indicates proper operation Red LED indicates operational problem Continuously variable from 5 to 100 of 1 Field configurable full scale Overcurrent Reverse Current Status Relay Relay coil de energizes when measured current exceeds Trip Setpoint Form C contacts Normally Open amp Normally Closed Rating 7 Amps 30 Vdc Green LED indicates operation OK No Overcurrent
44. to null the field produced by the primary conductor The term open path indicates that the sensor is an air core design without magnetic core material The LKAT Plus system operation is based on Ampere s Law which states the line integral of B magnetic flux density around any closed path is equal to uol permeability times current In practical terms this means that integrating a closed path around a primary conductor will yield the net primary current This integration is implemented using a specific array of Hall Effect ICs The LKAT Plus system effectively minimizes errors typically present in other open loop sensors zero drift thermal drift position sensitivity and susceptibility to external magnetic fields The absence of a magnetic core practically eliminates errors due to saturation hysteresis and core set remanance commonly associated with ferrite material A generalized block diagram of the LKAT Plus system is shown in Figure 6 1 2012 DynAmp LLC Page 21 043636 Q Installation Operation and Service Manual LKAT Plus Signal Conditioning amp Scaling Summing Current Amplifier Gain Adjust Isolation Loop D T H gt v Comparator Status LED gt Hall Array Head Half A Signal Conditioning DC Bias amp Scaling e Hall IC Array Head Half B SENSOR HEAD
45. to prevent the deterioration or failure of shipping containers or crates and cause ingress Frequent inspection of storage areas and storage containers or crates is required to ensure proper storage conditions are being maintained If the shipping container or crate is opened and or the equipment is removed for inspection prior to installation the equipment must be repackaged in the original undamaged container or crate in the same manner as it was shipped to prevent environmental damage or placed in a storage location that meets the required environmental and storage conditions General product storage temperature and humidity requirements Storage Temperature 40 to 70 C 40 to 158 F Storage Humidity 85 non condensing DynAmp LLC does not assume liability for the customer s failure to comply with handling and storage requirements For further assistance contact DynAmp customer support 2012 DynAmp LLC Page 3 043636 Q Installation Operation and Service Manual LKAT Plus This Page is Intentionally Blank 2012 DynAmp LLC Page 4 043636 Q Installation Operation and Service Manual LKAT Plus 3 DESCRIPTION 3 1 OVERVIEW The DynAmp LKAT Plus system is designed to accurately measure AC or DC current flowing in a bus bar Each system consists of a measuring head a metering unit and multi conductor cables 3 2 MEASURING HEAD LKAT measuring heads contain an arrangement of Hall Effect sensor ICs and signal
46. tory Calibration 2012 DynAmp LLC Page 24 043636 Q Installation Operation and Service Manual LKAT Plus IMPORTANT NOTE DynAmp LLC assumes no responsibility for the accuracy of LKAT Plus Systems calibrated by any person other than a DynAmp LLC Technician To calibrate the LKAT Plus System one compares the output of the device under test DUT to a reference During field calibration a 0 196 accurate current measurement system such as the DynAmp LKP or LKB may be used as a reference Due to significantly larger size and mass it may be difficult to install a comparably rated LKP or LKB measuring head in on the same bus as the LKAT Plus sensor head to be calibrated When several LKAT Plus sensors of the same size and scaling are used in a rectifier or at one location the use of a DynAmp LLC factory calibrated LKAT Plus System may be used as a reference Approval of this approach typically depends on the accuracy requirements of the measurement application LKAT Plus calibration may be performed on a test bus current that is less than the full scale current of the LKAT Plus System It is advisable to use a test bus current of 50 or more of LKAT Plus System rating The calibration accuracy depends on the stability of the test bus current the accuracy of the reference current measurement system and ammeters as well as the linearity of the LKAT Plus System LKAT Plus Systems may be returned to the factory for calibratio
47. unit are rated IP65 No part of the head or Metering Unit should be submerged under water RTV sealant must be used to seal the measuring head halves together during installation If RTV is not used the IP65 rating does not apply to the measuring head For best performance the head should be mounted in an area free of other bus bars This is not an essential requirement if a satisfactory magnetic centering can be achieved The head must be installed with proper polarity An arrow indicates the direction that conventional bus current must flow through the aperture to No damage will occur if the head is reversed but the system output will indicate current flow in the reverse direction Measuring heads are shipped in matched halves Make sure that the same serial number is present on the both halves of the measuring head and the metering unit The two head halves should mate squarely and evenly without forcing or twisting 2012 DynAmp LLC Page 13 043636 Q Installation Operation and Service Manual LKAT Plus 8 The measurement head is not grounded however the head cables should be disconnected from the metering unit prior to installation or maintenance to minimize the possibility of electrical shock When properly connected the power input cable will ground the LKAT Plus Metering Unit panel Refer to drawings at the end of this manual and connection detail on the side of the LKAT Plus Metering Unit enclosure 9 When instal
48. us System equipment is exposed to outdoor temperatures DynAmp LLC recommends these steps be performed during the hottest time of the year In addition the following steps should be performed once each year as part of annual maintenance 1 Visually inspect measuring head and interconnection cable for evidence of severe overheating cracks separation of bonded surfaces or excessive corrosion Record any suspect conditions 2 Inspect and adjust the tension of the mounting clamp plungers as needed 3 Visually inspect metering unit and signal converter s for evidence of severe overheating corrosion or condensation Record any suspect conditions and take appropriate action 4 Clean as necessary remove any oil or grease with a mild detergent Do not use abrasives or strong chemical solvents as they may damage the cables or erase the silk screen markings from the metering unit 5 Disconnect power to the system before servicing or replacing fuses CAUTION To avoid the risk of shock and electrocution always disconnect all cable assemblies before performing any cleaning or service operation on the metering unit 2012 DynAmp LLC Page 31 043636 Q Installation Operation and Service Manual LKAT Plus 73 RECOMMENDED SPARE PARTS The following table lists the minimum recommended quantities for spare parts for the LKAT Plus system As spares are used replacements should be ordered Since continuous operation of high current
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