i-STS Model G Static Transfer Switch 400 – 1600A Users Manual
Contents
1. 9 degrees 0 5 msec Manual TRANSFER 30 degrees Auto transfer Under Supply Fault pre settable 5 180 degrees gt 30 degree Break time 50 msec 20 150 msec 10 1 second settable 18 sub cycle settable less than 3 seconds 0 15 sec 35 kA 20 THDV lt 20 Electronic voltage and current Open circuit device Short circuit device Output phase voltage imbalance Overload Load Fault Device Over temperature Control Fault Ambient Over temperature Manual amp Automatic Sense Preferred Source Selection 26 8 Specifications 8 2 Main Item Components 8 2 Part Description Manufacturer Part Number Rating THY1 1 to Thyristors Dynex DCR3400V18 3400 Amps 1800 V 60kA 16 SNB1 DV DT LIMITER SP 1uF 10 Ohm 1000 v usec SNB2 CT1 4 CURRENT TRANSFORMER University Paton CP8660 660 Amps 1 instruments Q1 Q2 Q3 Q Circuit Breakers power MGE HW1 NS 630H 4P c w 630 Amps 4 amp Q5 Auxiliary switch Shut trip 230 V AC F1 amp F2 Fans Centrifugal Blower Ziehl Abegg RH31M4EK2C 1R 240 V 50 Hz Fl Fuses amp terminals Pheonix ST10 10 Amperes 240 V AC SP009 POWER CONTROL BOARD STATIC POWER SP017 02 n a SP002 STS CONTROL BOARD STATIC POWER SP002 01 n a SP003 DISPLAY BOARD STATIC POWER SP003 00 n a SP003A LED Mimic BOARD STATIC POWER SP003A 00 n a SP011 USER I O BOARD STATIC POWER SP011 00 n a2. SP023 Neutral Control Board STATIC POWER SP023 00 n a PLC SCR S C DETECTOR MOELLER EASY512 DA RC 12 VDC FD1 FAN PROXIMITY DETECTOR HIGHLY SENSOR TS18 08P 1 10 24 V DC 8MM PRS1 3 POWER SUPPLY HD MEANWELL RS 150 15 15 V 150 W PRS4 6 POWER SUPPLY HD MEANWELL RS 15 5 5V 15W PRS 7 POWER SUPPLY HD MEANWELL SP 200 15 220 V DC 20 T TO 15 V DC 200W PRS 8 POWER SUPPLY HD MEANWELL SP 75 5 220 V DC 20 T TO 5 V DC 75W VARISTOR INCOMING VARISTORS VARSI V385E60 385 V 60KA CT_VAR VARISTOR PROTECTION SENVA C 1220 0 75 50A V_FUSE VARISTOR FUSE FUSECO 422000 CARTRIDGE 22X58MM GG PROTECTION FUSE 500V 100A V_HOLDER CARTRIDGE FUSE HOLDER FUSECO SFH22FW SERVICE F H FRONT WIRED TO SUIT 2258F CONTROL RELAY INTERFACE POWER P TE CONNECTIVITY XT314L12 16A 12VDC RELAYS LUG IN SPDT COIL LED XT SERIES RELAY BASE RELAY DIN TE CONNECTIVITY RT7872P SOCKET SCREWLESS LOGICAL TERMINALS PT SERIES 28 9 Contact 9 1 9 1 Contact Details For Service and Maintenance i STS Manufacturing is a subsidiary of STATIC POWER PTY LTD ABN 42 101 765 913 Factory 1 13 Candlebark Court Research Victoria Australia 3095 Mail to BOX 2003 Research Delivery Centre Research 3095 Product Return Repair 1 13 Candlebark Court Research Victoria Australia 3095 PH 613 9437 0494 Fax 613 9437 0939 Email sales i sts com au support i sts com au or visit www i sts com au 29
3. access to the STS internal maintenance bypass switch for 1 or 2 switch Q4 or Q5 The supply from the source in bypass mode should be selected by manual operation of the corresponding maintenance bypass switch Application of this power should clear any downstream faults still present The alarm pushbutton is then pressed for 10 seconds to reset the alarm conditions followed by the transfer switch for the desired source to reinstate the STS to normal operation When the LED mimic indicates that the STS is active again the 1 or 2 LED is illuminated the maintenance bypass isolator can be manually opened If the RED LED ALARM led is lit then the user should interrogate the Event List to determine the cause To clear acknowledge some events the ALARM pusbutton needs to be operated as some alarms are latched and some clear automatically when the condition returns to normal Please also note that the VARISTOR fault is latched Access to the latch RESET pushbutton is gained via the rear panel door The Varistor Reset pushbutton is located at the lower RHS of the Varistor enclosure Fan failures will also active the ALARM LED and add an entry into the Event List If the alarm has cleared the ALARM led will extinguish by pressing the ALARM pushbutton Power Supply Failure of PSU1 2 amp 3 for both the 12 V DC and 5 V DC will activate the ALARM LED and add an entry into the Event List If the alarm has cleared the ALARM led will extinguish by
4. is the preferred source If STS is forced to automatically transfer the critical load to the alternate Supply 2 source the STS will automatically transfer back to Supply 1 when again within tolerance and a pre set settling delay Supply 2 is the preferred source If STS is forced to automatically transfer the critical load to the alternate Supply 1 source the STS will automatically transfer back to Supply 2 when again within tolerance and pre set settling delay 2 Control override CAUTION For maintenance only this should not be used as a transfer control 0 Normal Automatic Control Override gt Supply 1 is forced to supply the critical load directly 1 overriding any internal control logic NEVER attempt to operate the OVERRIDE switch if the supplies are not in synchronism Control Override gt Supply 2 is forced to supply the critical load directly 2 overriding any internal control logic NEVER attempt to operate the OVERRIDE switch if the supplies are not in synchronism 3 RS232 PORT The RS232 port implements a Modbus RTU RS232 An adapter can be used to convert this to RS485 All settings and calibrations can be performed through the front LCD control panel 12 3 STS Operation 3 2 4 User access CAUTION The power cabling should not be run adjacent to user controls Separate these control cables from power circuits by at least 300 mm The control signals are
5. pressing the ALARM pushbutton The station Auxiliary 5 amp 15 V DC power supplies are not monitored There is a green LED on each of these power supplies This should be periodically checked It should be Lit Green for correct normal operation 21 6 Maintenance 6 1 6 1 Overview The STS s has been manufactured to provide a long reliable and useful life However all equipment needs some maintenance After the welcome sign you may be prompted to enter the date and time This should be required the first time only We strongly encourage the setting of the date and time so that real time event correlation can be undertaken The Real Time Clock is thereafter battery backed up If connected and or the STS has been off for 1 2 months awaiting installation the battery requires replacement We recommend that the battery be replaced every 5 years as a precautionary matter Recommended Schedule Once per month record the operating variables and compare with the units specifications to ensure that you are within its operating capability Inspect the unit and note down any variations from last observation Action may need to be taken and or reporting may need to be taken on these variances Inspect the Event History and correlate any recorded events since last observation with real occurrences Report investigate any suspicious entries Once every 6 months sooner if the environment is bad vacuum dust from grills at front of unit I
6. when S2 is the maintenance bypass supply Q5 is closed for re instatement closure of Q3 the STS must be selected to Supply 2 Again if left unattended the Q3 will again be timed open if Lk 6 is in Once Q3 is open the STS can be tested in situ transferring between S1 and S2 however without any connection to the critical load because Q3 is open The above described control function is implemented using shunt trip devices such that if no supply is present CB fuse is opened or the STS is removed the control function is disabled and they operate as manual non controllable isolators only To achieve this functionality auxiliary contacts and shunt trips have been fitted to Q3 Q4 and Q5 The controls are implemented separately from the STS controls and the mode of failure of this control feature has been specifically designed to NOT interfere with or operate any of these isolators however if desired the Q3 trip facility can be disabled and operated fully manually default condition Q1 and Q2 are also able to be tripped by the system This is only undertaken if there is a thyristor fault or a supply back feed condition and is not part of the normal operation Note if the Q1 Q2 Q3 Q4 or Q5 trip then the toggle is in the centre tripped position To reinstate the user must first depress the toggle to the off position before being able to raise the toggle into the on position In the case of a control failure the STS internal contr
7. ARM cancel pushbutton for 6 seconds Refer to fault and remedial actions that may be required first 2 System Display Panel 2 3 2 3 LCD Display The LCD display provides information on the operation of the Static Transfer Switch None of the function selections available on the LCD cause a change of source selection or STS state The LCD menus are structured in a hierarchy through which the operator navigates by use of the LCD control pushbuttons LCD Display Hierarchy STATUS and ALARMS VARIABLES 7 Pa EVENTLIST gt 100 EVENTS 5 123 ooo SETTINGS 1 DATE amp TIME SETTINGS 2 SETTINGS 3 MODEL amp VER SETTINGS 4 UTILISATION CALIBRATION R J CALIBRATION W gt CALIBRATION 5 DIAGNOSTICS 7 PASS CODE fig 3 LCD Hierarchy The W pushbutton exits the hierarchal tree and returns the operator to the Status Screen From there the following submenus are available 2 System Display Panel 2 3 2 3 1 Variables Menu This menu item shows the input amp output variables Output Voltage R W amp B phase Output Current R W amp B phase Output Power Factor Output Power kWatts Output Power kVA Frequency for each source 1 Source Input Voltage R phase 1 Source Input Voltage W phase 1 Source Input Voltage B phase 2 Source Input Voltage R phase 2 Source Input Voltage W phase 2 Sou
8. FAL OK Status Indication Only No Action Repair Total harmonic Distortion of Alarm No Action Check current is very high Load Total harmonic Distortion of Alarm No action Check Load Voltage is too high Status Indication Only Response to interlocking controls CLOSED Q4 or Q5 controls Q4 or Q5 controls ALARM CANCEL Alarm Cancel was pressed Resets Audible amp Latched LED POWER SUPPLY Status Indication Only None Contact Static Power Repair SCR SC S1 S2 R SCR on S1 or S2 short circuit Contact Static Power Locks B N detected on phase to safe source SCR OC 1 52 R SCR on S1 or S2 Open circuit Contact Static Power Locks B N detected on phase to safe source 20 5 Fault Diagnosis 5 2 5 2 Load Fault In case of sustained high current output load faults the STS will inhibit a transfer to the alternate supply even if this means degradation or loss of source supply It is therefore imperative that you ensure that the discrimination with down stream and upstream protective devices ensures that the downstream protective device always clears the fault first In case that all output is lost the faulty equipment should be located and removed from the STS output before re instatement of power At this point it is recommended that the source 1 or 2 be transferred to bypass to allow greater capacity to isolate down stream faults without affecting the source voltage integrity It will be necessary to gain
9. distance limited to 30 metres All output relays contacts are rated for 50 V DC 1 Ampere Not 240 V AC rated User Remote Inputs Voltage free contact closure controllers only COMM Common return a Transfer to Supply 1 b Transfer to Supply 2 Cc Fire Stop Causes both Switches to go off loss of output DISABLED User Relay Outputs Relays are normally closed and held open in OK state closed contact represents the alarm state General Alarm Not in Synchronism Supply 1 OK Supply 2 OK On Supply 1 On Supply 2 Overloaded onmo 13 4 Maintenance Bypass 4 1 4 1 Overview Note if the Q1 Q2 or Q3 trip then the toggle is in the centre tripped position To reinstate the user must first depress the toggle to the off position before being able to raise the toggle into the on position Similarly for Q4 and Q5 In the case of a control failure the STS internal control logic can be overridden and the output can be forced to the correct state using the OVERRIDE switch to position 1 or 2 as appropriate Remember that the switch needs to be in the centre O position for normal operation The override provides control logic bypass only it does not provide an alternative path for the load power NEVER attempt to operate the OVERRIDE switch if the supplies are not in synchronism There is no interlock to prevent the switch from being operated when the supplies are not available or not in synchronism Refer to the LCD variable
10. e never paralleled so that the failure of one supply source has no impact on the other The supplies can be truly independent The installed STS is a 4 Pole switch 3 pole only shown in Fig 1 where the neutral is also switched The arrangement for the 4 pole is identical to each of the poles as shown above In the case for the neutral the transfer is overlapping Upon incoming supply failure or degradation of the selected supply the STS immediately transfers the critical load to the alternative stand by source The break time is usually less than one millisecond however under worst case conditions can be up to 5 milli seconds In the case of down stream load fault conditions the fault current drawn from the supply may degrade or damage the supply sources as a consequence should a fault current exist in the load the STS will inhibit a transfer to the alternate source even if this causes source supply degradation or loss At least the fault will not be 1 System Description 1 1 transferred to the alternate supply with the possibility of degrading both sources The current threshold for isolation is pre set and is dependent on factors such as the capacity of the supply sources line impedance and the line protection schemes employed for each STS The STS is completely self contained with its own detection logic display and controls 2 System Display Panel 2 1 2 1 Overview The system display panel consists of an LED mimic LCD in
11. formation display optional and control pushbuttons The optional LCD display is fitted to these units though it is not required for normal operation STATIC TRANSFER SWITCH fig 2 The system display panel 1 LCD display 2 Control pushbuttons 3 MIMIC display 2 System Display Panel 2 2 2 2 Controls The LCD control pushbuttons are as follows p NEXT Scroll across for more v DOWN Scroll down for next TRANSFER Transfer to alternate supply AN ALARM C Cancel audible acknowledge alarm lamp test The TRANSFER pushbutton forms part of the mimic display and is standard on all units The operator merely pushes the transfer pushbutton to effect a transfer to the alternate supply The availability of supply 1 and 2 is indicated by their respective supply LEDs The synchronization hold off LED is located between the two supply LEDs Green is in synchronism LEDs 1 and 2 indicate which source is supplying the critical load All LEDs are bi colour where GREEN indicates the normal or on state An alarm LED indicates an unacceptable alarm or fault condition Information as to the cause of the alarm condition is available from the LCD event history or the status LEDs located on the control board on the inside of the front door The alarm LED and audible alarm if available can be cancelled by pressing the Alarms Cancel pushbutton below the ALARM LED Transfers if inhibited by a control function can be reset by pressing the AL
12. from the controls on the front panel Preferred source selection is pre set by a mechanical slide switch inside the unit or via menu selection Note that at power up the STS will activate the preferred source as pre set by the slide switch either supply 1 or 2 If no preferred source is set then the unit will not re transfer to the original source after a fault in that source fig 4 User control panel 1 The preferred source selection switch set to 0 no preferred source 10 3 STS Operation 3 1 Manual transfers override the preferred source selection operation of STS to alternate supply say S1 when preferred is S2 where S1 fails will transfer to S2 but not return back to S1 Preferred source selector can also be used to transfer the critical load The Static Transfer Switch is fitted with two manual bypass isolators refer fig 1 These are designated Q4 and Q5 where Q4 corresponds to the supply 1 switch and Q5 corresponds to the supply 2 These are mechanically and electrically interlocked to ensure that the two inputs 1 and 2 can never be permanently connected in parallel Note that this is a standard option and can also be provided by others outside the STS 11 3 STS Operation 3 2 3 2 User I O amp Controls These are located within the STS cubicle bottom RHS of the panel as shown fig 5 User control panel 1 Preferred source selection pre set 0 No preferred source Supply 1
13. his menu item provides details on the equipment operating status and event history STS Status Status summary of the Static Transfer Switch Provides information on any active alarm or fault conditions Alarms Other active conditions and digital inputs 2 3 5 Calibration Menus Used to adjust display accuracy only or 2 3 volts 3 STS Operation 3 1 3 1 Overview The Static Transfer Switch control panel consists of an LCD display LEDs and pushbuttons to provide information on the operation and status of the equipment The LCD pushbuttons and LCD menu items cannot change the state of the Static Transfer Switch this can only be done with the transfer pushbuttons except when incorrect settings are made Selection of the required source to supply the critical load is made by simply pressing the transfer pushbutton for at least 2 seconds Provided the supplies are within synchronization limits the selected supply will be connected to the load Verification is provided by the LCD and mimic LEDs If the selected supply should vary outside preset limits and become unusable the STS will automatically transfer the load to the alternative supply The preferred source directive preset able will ensure that the STS will return to the preferred source if it is available and within acceptable limits and after a settling time The preferred source selection does not operate if the STS is manually transferred to the alternative supply
14. i STS Model G Static Transfer Switch L oe Users Manual April 2012 Contents 1 System Description 1 1 Static Transfer Switch 2 System Display Panel 2 1 Overview 2 2 Controls 2 3 LCD Display 3 STS Operation 3 1 Overview 3 2 User I O amp Controls 4 Maintenance Bypass 4 1 Overview 4 2 To Maintenance Bypass Procedure 4 3 Reinstatement from Maintenance Bypass Procedure 5 Fault Diagnosis 5 1 Interpretation of LCD Event List 5 2 Load Fault 6 Maintenance 6 1 Overview 7 Detailed System Description 7 1 Overview 8 Specifications 8 1 Operating Parameters 8 2 Main Item Components 9 Contact 9 1 Contact Details 10 12 14 17 18 19 22 22 23 26 27 28 1 System Description 1 1 1 1 Static Transfer Switch STS The Static Transfer Switch STS provides power and redundancy to items requiring having only a single AC supply The STS selects this supply from one of two input AC supplies If one of the supply sources becomes unavailable the STS will automatically transfer the critical load to the alternative AC supply source Manual selection of supply is also possible This Static Transfer Switch has 3 identical and symmetrical switches one for each phase of the 3 phase AC supply output S1R 2R S1W S2W 51B 52B B R fig 1 An examp of a 3 pole STS This STS implementation uses Break Before Make transfer characteristics to ensure that the two sources ar
15. nce bypass then it too should be in the normal position prior to this step Go to normal mode Use switching procedure 3 1 2 to go on line There should be no RED ALARM LED If there is press and hold for 10 seconds Try using the TRANSFER push button to transfer to the alternate supply To affect a transfer you need to push and hold the transfer pushbutton for at least 2 seconds 15 4 Maintenance Bypass 4 1 The LCD should show that it is now powering the load from the other supply non preferred If unsuccessful or the LCD is not functioning a transfer can be affected using the PRIORITY switch Simply slide the switch to the desired supply wait 2 seconds and check the LEDs and display to confirm 16 4 Maintenance Bypass 4 2 4 2 To Maintenance Bypass Procedure 1 OR If possible use the TRANSFER pushbutton to transfer the load to the desired source Supply 1 or Supply 2 Use the OVERRIDE slide switch located lower RHS near fuses F1 F7 and operate to the 1 or 2 position corresponding to Supply 1 and Supply 2 that is presently supplying the critical load To transfer to Maintenance Bypass on Supply 1 operate the Q4 Maintenance Bypass Isolator to the ON position May need to reset the isolator to the off position before being able to turn ON To transfer to Maintenance Bypass on Supply 2 operate the Q5 Maintenance Bypass Isolator to the ON position May need to reset the isolator to the off p
16. nspect cable plug connections for overheating Units with fans need their fans changed every 5 7 years This may need to be sooner if the environment is bad NOTE Please note that the user should not undertake repair procedures or gains access to the internal of the equipment If the unit is faulty then it should be removed from service as per the accompanying procedure and a qualified experienced service agent should affect repair 22 7 Detailed System Description 7 1 7 1 Overview The Static Transfer Switch STS provides power to items requiring a single AC supply The STS selects this supply from one of two input AC supplies If one of the supply sources becomes unavailable the STS will automatically transfer the critical load to the alternative AC supply source Manual selection of supply is also possible With reference to the accompanying schematic the following operational maintenance bypass arrangement has been adopted Auxiliary contacts S1R 2R S1W S2W S1B S2B ensure that STS is in the correct state prior to operation 05 77 gt Wired to STS Transfer amp status contacts Electromechanical interlocks ensure correct sequence of operation Q1 and Q2 are the STS incoming supplies to the STS They are always ON unless the STS requires isolation for maintenance 1 Similarly Q3 is also always normally ON 2 Power to the critical load is provided by either STS S1 or S2 3 Sho
17. o that when a fault occurs other items connected to the STS are not powered off by the opening of upstream protective devices The upstream STS supply breaker fuse should only open if the down stream device protection is unable to trip or there is a fault within the STS In case of down stream fault the STS will not transfer the fault to the alternate supply even if the voltage is adversely affected Once the fault current has cleared the STS will resume normal operation protecting the critical loads from voltage disturbances 10 second settling time After following all of the considerations and precautionary processes in the last section and been successful and understanding then no further special set up is necessary Each unit has been fully certified and heat soaked prior to shipment The red LED ALARM should not be on If it is check the following states ON Supply 1 when priority is Supply 2 On Supply 2 when priority is Supply 1 Supply 1 or Supply 2 are not in spec Override Switch is in position 1 or 2 Supply 1 amp 2 are not in synchronism The unit is too hot thermal bi metal switch on H S activated There is was an overcurrent overload load fault condition CAUTION REMOVAL OF PANELS EXPOSES DANGEROUS VOLTAGES ACCESS RESTRICTED TO QUALIFIED PERSONNEL ONLY Ensure from the supply that you are connected to on the STS is also the supply selected by the Maintenance Bypass Switch supply If you have a remote maintena
18. ol logic can be overridden and the output can be forced to the correct state using the OVERRIDE switch to position 1 or 2 as appropriate Remember that the switch needs to be in the centre O position for normal operation 24 7 Detailed System Description 7 1 The override provides control logic bypass only it does not provide an alternative path for the load power NEVER attempt to operate the OVERRIDE switch if the supplies are not in synchronism There is no interlock to prevent the switch from being operated when the supplies are not available or not in synchronism Refer to the LCD variables display and mimic diagram for the not in synchronism state SYNC LED will be RED variables display will show degrees out of synchronism Only operate when less than 10 degrees If the control is not operating you may need to use other means to determine that the supplies are in synchronism Do not operate the OVERRIDE switch onto an absent supply Do not defeat the mechanical and or electrical interlock scheme of Q4 and Q4 25 8 Specifications 8 1 Operating Parameters Steady state Rating Overload capacity Synchronization Inhibit limit Steady State Transfer Threshold Transient Transfer Threshold Re transfer preferred source time out KA Capacity of unit Operating Voltage Protection Operation 630 Amperes RMS phase including Neutral 110 60 minutes any phase 125 15 minutes any phase 300 600 maximum
19. osition before being able to turn ON The critical load is now being supplied by the Maintenance Bypass Isolators Isolate the STS by opening the STS Output Isolator Q3 Q3 toggle Right Before commencement of work on the STS it is necessary to open the incoming STS isolators Q1 and Q2 Note that dangerous voltages are still present within the STS To isolate the fans operate knife Fuses F5 amp F6 by pulling from the top of the fuse holder To isolate electronics power operate knife Fuses F1 F2 F3 amp F4 by pulling from the top of the fuse holder Then remove the Auxiliary Station Control Fuses located at the bottom of the LHS control cubicle These are removed by unscrewing the fuse from the fuse holder Do not operate the unit without the fans operating e g Q1 amp Q2 amp Q3 must be open if fan fuses are removed 17 4 Maintenance Bypass 4 3 4 3 Reinstatement from Maintenance Bypass Procedure is 10 Reinstate fuse F1 F7 and the Auxiliary Station Control Fuses located at the bottom of the LHS control cubicle This will energize fans and electronics controls Ensure that OVERRIDE slide switch located lower RHS near fuses F1 F6 is still operated to Supply 1 if Q4 is ON or Supply 2 if Q5 is ON by sliding to the 1 or 2 position corresponding to Supply 1 and Supply 2 respectively Close the STS incoming supply Isolators Q1 and Q2 Note that this energizes power to all internal powe
20. r connections Press and hold the ALARM pushbutton for at least 6 seconds to clear any operational inhibit condition Note that the ALARM LED will still be illuminated as the STS is not in the normal condition Check the LCD display and mimic and ensure that the correct supply has been selected remove the OVERRIDE by setting the slide switch to the centre 0 position Again check the LCD display and mimic and ensure that the correct supply is indicated Close Q3 by operating the toggle to the left Again check the LCD display and mimic and ensure that the correct supply is still indicated Open Q4 or Q5 which ever is on by pushing the toggle to the off position The load is now supported by the STS Use the TRANSFER pushbutton on the front control panel to select the desired source Check and ensure that this corresponds to the PREFERRED source selection located above the OVERRIDE switch Check that the LCD display and mimic correctly reflect the state of the system and that the ALARM LED is off 18 5 Fault Diagnosis 5 1 5 1 Interpretation of LCD event list vent Descriptor Append Description STS Action Resulting INITIALIZE RAM CHKsum failed Cold Start None Contact Static Power RAM Corrupt Flash Defaults downloaded all but RAM Keeps Event List ATCHDOG Signals software hardware None Contact Static Power IMER Diagnosti problems c STACK Stack or Heap has o
21. rce Input Voltage B phase Phase Angle between Sources 1 amp 2 2 3 2 Events List Real time event list 200 most recent events see fault diagnosis section for explanation of events 2 3 3 Settings Menu This menu item provides a facility for adjusting STS settings and calibrations 2 3 3 1 Password Restricted access to set up menus optional menu item 2 levels of access 000 and 123 can be changed by user 2 3 3 2 Date Time Date and Time adjustment This menu item displays general information about the equipment 2 3 3 3 Contact details Service contact numbers Model Specification Software amp Firmware revision status 2 3 3 4 Internal Settings Needs Special PASSWORD for access Access to calibration submenus including Source 1 Voltage Transient Hi Lo Steady State Hi Lo Source 2 Voltage Transient Hi Lo Steady State Hi Lo 2 System Display Panel 2 3 Output Voltage Transient Hi Lo Steady State Hi Lo Output Current Overcurrent Threshold Overload l2t time and current Settings Re Transfer Delay no of re tries Preferred Source Selection Diagnostics 2 3 3 5 Synch Angle Detection Setting Provides access to adjust the allowable not in synchronism transfer Default is 9 and is adjustable between 5 30 Manual transfers are inhibited when supplies are outside this range however automatic transfers will experience a 50 msec break settable 0 150 msec 2 3 4 Status T
22. s display and mimic diagram for the not in synchronism state SYNC LED will be RED variables display will show degrees out of synchronism Only operate when less than 10 degrees If the control is not operating you may need to use other means to determine that the supplies are in synchronism Do not operate the OVERRIDE switch onto an absent supply Do not defeat the mechanical and or electrical interlock scheme of Q4 and Q4 Do not operate the unit without the fans operating e g Q1 amp Q2 amp Q3 must be open if fan fuses are removed CAUTION THIS EQUIPMENT RECEIVES POWER FROM MORE THAN ONE SOURCE DISCONNECT OUTPUT AND ALL INPUT SOURCES OF POWER FROM THIS EQUIPMENT BEFORE SERVICING WARNING HIGH LEAKAGE CURRENTS ON ISOLATED INCOMING AND OUTGOING CIRCUITS EARTH CONNECTION IS ESSENTIAL BEFORE WORKING ON CIRCUITS OR CONNECTING DISCONNECTING SUPPLIES SEE INSTALLATION INSTRUCTIONS BEFORE CONNECTING DISCONNECTING INPUT SUPPLIES 14 4 Maintenance Bypass 4 1 Read this whole document thoroughly Understand every aspect before proceeding Request further assistance if you do not understand any aspect of the operation of the STS Support and contact numbers are at the rear of the manual Consider electrical distribution discrimination carefully The STS has two incoming AC power isolators your upstream protective devices must discriminate with down stream protective devices and limit the peak fault current to less than 60kA s
23. uld the operator wish to transfer the critical load to the alternate supply say from S1 to S2 then the STS TRANSFER control pushbutton is used to achieve this 4 Q4 and Q5 Maintenance Bypass isolator for Supply 1 and Maintenance Bypass isolator for Supply 2 respectively are normally always left OFF These are mechanically interlocked so that only one can ever be closed They are also electrically interlocked with the STS so that only the correct one can be closed e g Q4 if on S1 OR Q5 if on S2 23 7 Detailed System Description 7 1 10 11 12 If maintenance on the STS is to be undertaken then it is recommended that the system is transferred to Maintenance Bypass using either Q4 or Q5 Only one of these will be able to be closed depending on the state of the STS If the STS is supplying the critical load via S2 then only Q5 is able to be closed because of the electrical interlock between the STS and Q4 and Q5 and also Q3 A control override function exists that enables transfer to the alternate supply in case of STS controls malfunction Once on Maintenance Bypass e g Q4 or Q5 are closed it is advisable to open Q3 to isolate the STS from the critical load This also facilitates testing of the STS For convenience Q3 is automatically tripped open after 1 minute after the closure of the either Q4 or Q5 The Q3 can be re closed at any time for re instatement provided he correct state has been selected e g
24. verflowed None Contact Static Power Diagnosti c EEPROM a FLASH EEPROM Checksum error cal may be damaged Program is in error replacing 6 7 8 Proc Ana1 Ana2 N1 N2 can self repair Calibration of MSP required ON OFF LOW POWER MODE Power LOW POWER MODES Down Modes loss of electronics power Transfers to supply 2 if on 1 OM Transfers to supply 2 if on 1 Transfers to supply 2 if on 1 State Low 1 sec HI OK Supply 1 or 2 OR 3 has Steady Transfers to supply 2 if on 1 State High 1 sec FAILED Supply 1 or 2 OR 3 has Steady Transfers to supply 2 if on 1 OK State High 1 sec 3 OVERRIDE Controls Override set to S1 User Manual Switch Only PREFERRED Preferred Source Set 0 or 1 User Manual Switch Only S1 S2 FREQ Frequency of supply 2 is high or Alarm No action LOW HI low OK ead requested epee requested BACK FEED 1or2on_ Back feed voltage too high on S1 pacer ewo orse Remote Supply off Requested Via User Inputs or BMS EPO SYNCRONISATION LOS OK S1 amp S2 not in synchronism Alarm No action 5 Fault Diagnosis 5 1 STS Action Resulting CURRENT ARN Output is overloaded timed Alarm No action starts timer IGH shutdown FAULT OK HEAT SINK TEMPHI OK Fans Failed or Over Stressed No Action Check amp Reduce Device Temperatures Heat Sink Loading or Ambient is Over temperature LOAD FAULT FLT CLR There was a fault at the load Does not transfer Inhibit FAN
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