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AUTOM ATI C TR A N S FE R SWITCH , OTM _C _ 21D

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Table of contents

1.

SYMBOLS

&

TERMS

3

2.

PRODUCT

OVERVIEW

4

3.

QUICK

START

78

4.

INTERFACE AND SETTINGS

17

5.

TECHNICAL

DATA 22

6.

INSTALLATION

23

7.

OPTIONAL

ACCESSORIES

26

8.

MAINTENANCE AND COMMON

TROUBLESHOOTING

29

9.

APPENDIX

30

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Содержание OTM C 21D

Страница 1: ... INSTALL ATION AND OPER ATING INSTRUCTION Automatic Transfer Switch OTM_C_21D Automatic Transfer switch 34OTM_C_21D rev E 1SCC303015M0201 EN ...

Страница 2: ... _C _ 21D Table of contents 1 SYMBOLS TERMS 3 2 PRODUCT OVERVIEW 4 3 QUICK START 78 4 INTERFACE AND SETTINGS 17 5 TECHNICAL DATA 22 6 INSTALLATION 23 7 OPTIONAL ACCESSORIES 26 8 MAINTENANCE AND COMMON TROUBLESHOOTING 29 9 APPENDIX 30 ...

Страница 3: ...n equipment Information provides important information about the equipment Table 1 Explanations of abbreviations and terms 1 2 Explanations of abreviations and terms OTM_C21D Automatic transfer switch the type name LN1 Switch I Power supply line e g the primary line LN2 Switch II Power supply line e g the secondary line used in emergency cases EMRG OFF Used to drive the automatic transfer switch t...

Страница 4: ...ransfer switch 1 Handle for manual operation 2 Place for auxiliary contact blocks 3 Push button 4 Mimic panel 5 Voltage sensing connections 6 Locking clip for padlock 7 Locking latch for releasing the handle and locking electrical control 8 Locking clip for locking manual operation 9 Dip switches 10 Rotary switches 11 Connecting terminal 12 Modbus RTU access 10 4 5 7 11 9 8 1 3 6 2 12 operated han...

Страница 5: ...matic Switching Sequences in OTM_C_21D Line 1 priority The transfer sequence of OTM_C21D can be sum marized in following steps An anomaly occurs on the Line 1 LN1 Generator start immediately start generator in case of black out phase loss overvoltage or undervoltage If Generator mode is selected The Line 2 start the normal functioning transfer delay Ts Change over switch Switch I to the position 0...

Страница 6: ...witch II to the position II And the return sequence can be summarized in the following steps The Line 1 will start the normal functioning Change over switch stays in position II An anomaly occurs on the Line 2 LN2 Return delay TBs Change over switch Switch II to the position 0 Change over switch Switch I to the position I Figure 3 Automatic Switching Sequences in OTM_C_21D No line priority Generat...

Страница 7: ... functioning transfer delay Ts Change over switch Switch I to the position 0 Change over switch Switch II to the position II Figure 4 Automatic Switching Sequences in OTM_C_21D Manual return mode And the return sequence can be summarized in the following steps The Line 1 will start the normal functioning Change over switch stays in position II An anomaly occurs on the Line 2 LN2 Change over switch...

Страница 8: ...the switch the switch will enter manual mode with the automatic operation disabled Do not adjust wires when the transfer switch is being energized Before the power on operation of the transfer switch please operate the switch manually to confirm it is in normal function With the power supply function in normal and without the handle inserted and EMRG OFF signals the initially energized switch will...

Страница 9: ...ocking clip and remove the handle from the switch 2 Press AUTO button and the AUTO LED will be ON indicating automatic mode Figure 6 Selecting the automatic transfer OTM_C_21D switch to Auto Mode 2 1 3 3 2 Automatic operation If handle is not inserted 1 If AUTO LED blinks press AUTO button and the AUTO LED will be ON indicating auto matic mode 2 Automatic operation includes three operating modes L...

Страница 10: ... Ensure that the OTM_C21D is in automatic mode AUTO LED is on 3 Short circuit the remote test signal for at least 100 ms until the AUTO LED blinks to enter the test mode Under test mode the automatic transfer switch will simulate switching cycle and finally return to its original position prior to the activation of the test mode e g when the switch is in Position I Enter test signals the switch tr...

Страница 11: ... pulling out the clip from the handle and place the padlock on the handle see Figure 9 1 2 3 4 Ø5 6 mm The switch can be padlocked in any position causing that all operating modes and test operations are disabled and handle cannot be inserted See below for operation Figure 9 Locking the manual operation 3 4 1 Locking the electrical operation 3 4 Locking 3 4 2 Locking the manual operation ...

Страница 12: ...ault 1 Modbus Baud Rate 4800bps 9600bps Default 19200bps 38400bps Modbus Stop Bits 1 Stop Bit Default 2 Stop Bits Modbus Parity None Odd Even Default Local Remote Local monitoring mode Default Remote control mode Table 2 Modbus parameters of OTM_C21D 3 5 2 Modbus functional code Function code Name 03 0x03 Read Holding Registers 04 0x04 Read Input Registers 06 0x06 Write Single Register 16 0x10 Wri...

Страница 13: ... VOLTAGE 7 04 LN2_U3 VOLTAGE 8 04 LN1_LINE_STATUS 9 04 0 Voltage OK 1 No voltage 2 Undervoltage 3 Overvoltage 4 Phase missing LN2_LINE_STATUS 10 04 0 Voltage OK 1 No voltage 2 Undervoltage 3 Overvoltage 4 Phase missing RATED_VOLTAGE 11 04 0 220 380V 1 230 400V 2 240 415V UNDERVOLTAGE_THRESHOLD 12 04 5 10 15 20 25 30 OVERVOLTAGE_THRESHOLD 13 04 5 10 15 20 25 30 TRANSFER_DELAY_TS 14 04 0 1 2 3 5 10 ...

Страница 14: ...witching mode 1 Emergency off mode 2 Local test mode see 3 3 1 3 Remote test mode see 3 3 2 4 Auto mode LINE_PRIORITY 21 04 0 Line 1 priority 1 No line priority 2 Manual back switching EMERGENCY_OFF_STATUS 22 04 0 Emergency off not happen or elimi nated 1 Emergency off happens OPERATION_COUNTER 23 04 Number of switch position transitions PRESENT_ALARM 24 04 0 No alarms 1 Switch I transfer fail 2 S...

Страница 15: ...4 0 50Hz 1 60Hz GENERATOR_STOP_DELAY 29 04 0 30s 1 240s GENERATOR_USAGE 30 04 0 No Generator 1 Generator In Use GENERATOR_START 31 06 1 Start generator CONTROL 32 06 1 Remote control to I 2 Remote control to O 3 Remote control to II 4 Enter remote test function see 3 3 2 OPERATING_MODE 33 03 06 0 Local monitoring mode 1 Remote control mode Table 4 OTM_C21D register information Modbus parameters co...

Страница 16: ...or losses related to such security breaches unauthorized access interferen ce intrusion leakage and or theft of data or information Secure Deployment The user of the product should be aware that the unsecure nature of the serial Modbus protocol exposes the communication between the product and the control system Encryption authentication or integrity of transmitted data are not provided by the pro...

Страница 17: ...e 11 Buttons Table 5 Buttons Button Function Remarks I ON Transfer to LN1 Only available in automatic mode and remote test mode O OFF Transfer to 0 position II ON Transfer to LN2 Auto Select autiomatic mode fault clearance and reset Transfer using bypass transfer delay and return delay ...

Страница 18: ...I closed Switch I or II closed Switch I or II open Switch I or II open Switching failure Switching failure Auto Transfer switch in automatic mode Transfer switch in automatic mode Transfer switch in test mode or invalid setting Transfer switch in test mode or invalid setting Transfer switch in manual mode Transfer switch in manual mode EMRG OFF Receiving emergency off signals Receiving emergency o...

Страница 19: ...f transferring from the LN2 to the LN1 in automatic mode The options are 0 5 10 20 30 60 120 300 600 and 900 seconds Overvoltage threshold OV and undervoltage threshold UV The benchmarks of the OV and UV are the rated voltage of the switch When the voltage is higher than the pre set OV value or lower than the pre set UV value the switch performs automatic transfer The value of OV can be 5 10 15 20...

Страница 20: ...ng 0 in this mode Table 7 Dip switch The 9 bit dip switch is used to set the working modes of transfer switch DIP No Function Setting 1 2 Pole setting 01 10 11 00 2 poles 3 poles 4 poles Invalid setting 3 4 Mode setting 01 10 11 Default 00 No line priority Manual back switching Line priority LN1 Invalid setting 5 6 Voltage setting 01 10 11 00 240VAC 415VAC 230VAC 400VAC 220VAC 380VAC Invalid setti...

Страница 21: ... OFF 5 6 Generator start generator start signal output When the backup power is a generator it is used to start close signal and stop open signal the generator After the switch transfers to the normal power the generator stop signal is sent after the preset delay for generator stop see the ninth bit in section 4 4 for the generator stop delay setting 7 8 9 Switch status feedback signal output 10 1...

Страница 22: ... I O II II O I OFF time 0 6 0 7 s Total transfer time 2 5 s Output relay utilization category 3A AC1 250V Electromagnetic compatibility Class B Ingress Protection Rating IP20 front panel Rated impulse withstand voltage Uimp 8 kV 6 kV for control circuit disconnect the power line of the control circuit before carrying out the dielectric voltage withstand test Operating temperature 25 55oC Transport...

Страница 23: ...ITCH OTM _C _ 21D Figure 17 Installation of OTM_C21D screw The switch can be installed using screws or a DIN rail The fixed installation mode on the base board is as follows 2 M4 4 6 Installation 6 1 Installation method M4 2Nm ...

Страница 24: ...lows First pry out the latch with an appropriate tool as shown in Fig 13 After attaching the switch to the DIN rail push the latch back to lock it Figure 19 Installation of DIN rail After attaching the switch to the DIN rail make sure you push the latch back to the lock posi tion otherwise the switch may fall off Push ...

Страница 25: ...25 AUTOMATIC TR ANSFER SWITCH OTM _C _ 21D Figure 20 Dimensions 6 2 Installation dimensions ...

Страница 26: ...32 125F3C21D OTM32 125F4C21D OMZC04 Number of conductors permitted to be clamped on the terminal 2 Wire specification 10 70 mm 8 00 AWG 17 6 Nm Figure 21 Bridging bars 7 Optional accessories 7 1 Bridging bars Table 1 1 Number of conductors 2 Table 1 2 10 70 mm2 8 00 AWG ...

Страница 27: ...liary contact blocks OTS125T1 OTS125T OTS125T3 3 4 1 2 I OA7G10 OA1G01 Contact type NO NC I O II II OA1G10 OA8G01 0 8 Nm 0 75 2 5 mm 18 14 AWG OA710 OA1G01 Contact type NO NC I O II 7 2 Terminal shrouds 7 3 Auxiliary contact blocks Figure 22 Terminal shrouds ...

Страница 28: ...communication module Do not break the box if Modbus RTU module is not ready for assembling When Modbus RTU is assembled to OTM_C21D paste a cover to the hole to protect the switch from being polluted if the module needs to be removed 7 4 Modbus communication module ...

Страница 29: ...ignal is 24V DC 2 Too short duration of EMRG OFF signal Correctly switch on the EMRG OFF signal which should only be 24V DC with the duration 1 s 5 AUTO LED blinking 1 DIP switch setting is invalid 2 Generator is ON in no priority mode Check if the DIP switch setup matches the power supply Turn off generator in no priority mode 6 I or II LED blinking Execution rejected during switching operation t...

Страница 30: ...30 AUTOMATIC TR ANSFER SWITCH OTM _C _ 21D 9 Appendix 9 1 Wiring diagram Figure 25 Wiring diagram ...

Страница 31: ...ad through this instruction book carefully before working on the switch and keep this instruction book safe for later reference The images provided in this instruction book are for illustration only and may not match the actual product exactly This instruction book is subject to change for product updates without prior notice ...

Страница 32: ...Contact us ABB Oy P O Box 622 FI 65101 Vaasa Finland abb com lowvoltage Copyright 2021 ABB All rights reserved Specifications subject to change without notice 34OTM_C_21D rev E 1SCC303015M0201 2 11 2021 ...

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