ABB OTM_C_21D Page 20 Installation And Operating Instructions Manual Download | Manualshive

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

OTM32-125F2C21D

OMZC03

OTM32-125F3C21D

OTM32-125F4C21D

OMZC04

Number of conductors permitted to be

clamped on the terminal

≤

2

Wire specification: 10-70 mm², 8-00 AWG

17

6 Nm

Figure 20. Bridging bars

Bridging bars

—

Optional accessories

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Summary of Contents for OTM_C_21D

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

Page 2: ...003 004 Symbols Terms 005 008 Product overview 009 012 Quick start 013 016 Interface and Settings 017 Technical data 018 020 Installation 021 022 Optional accessories 023 Maintenance and common troubleshooting 024 Appendix ...

Page 3: ...ovides important information about the equipment Table 1 Explanations of abbreviations and terms Explanations of abreviations and terms OTM_C_21D 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 EMERG OFF fire control system Used to drive the automatic transfer switch transfers...

Page 4: ... or fully automatically The automatic mode includes several operating methods Line 1 priority no line priority and manual back switching mode The standard package includes 1 automatic transfer switch 2 handle 3 handle storage clip and 4 terminal plug Figure 1 OTM_C_21D automatic transfer switch 1 Handle for manual operation 2 Place for auxiliary contact blocks 3 Push button 4 Mimic panel 5 Voltage...

Page 5: ...r switch Switch I to the position I Generator stop delay Gs Generator stop Figure 2 Automatic Switching Sequences in OTM_C_21D Line 1 priority LN1 LN2 Switch I status Switch II status Ts TBs An anomaly occurs on the Line 1 LN1 Switching delay Ts in case of phase loss over voltage and undervoltage conditions Generator start immediate start generator in case of black out in case of phase loss overvo...

Page 6: ...teps The Line 1 will start the normal functioning Change over switch stays in position II An anomaly occurs on the Line 2 LN2 Back switching delay 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 LN1 LN2 Switch I status Switch II status Ts TBs Generator is disabled in no line priority K...

Page 7: ...on 0 Change over switch Switch II to the position II Figure 4 Automatic Switching Sequences in OTM_C_21D Manual back switching mode LN1 LN2 Switch I status Switch II status Ts The back switching 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 stays in positi...

Page 8: ...ed on Before powering on the transfer switch please manually operate it to ensure it can oper ates and moves normally Then power supply is normal and without the handle attached or EMRG OFF signals the switch will be in automatic mode and switch to the primary line upon initial power up Keep the handle attached if you do not want the switch to be in automatic mode upon initial power up 2 When the ...

Page 9: ...ED is on in order that the switch can per form automatic transfer cycles according to the preset operating mode If handle is not inserted 1 If AUTO LED blinks press AUTO button and the AUTO LED will be ON indicating automatic mode 2 Automatic operation includes three operating modes Line 1 priority factory default setting No line priority and manual back switching mode System testing Local test In...

Page 10: ...ns to its original position Under test mode press the AUTO button to cancel test mode and return to automatic mode The Auto LED will be ON as normal 4 After the remote test finishes the OTM_C_21D automatically returns to the automatic mode AUTO LED is on Remote test The procedure of the remote test is as follows 1 Connect to the remote test signal according to Figure 7 2 Ensure that the OTM_C_21D ...

Page 11: ...tion 0 The handle can be padlocked by pulling out the clip from the handle and place the padlock on the handle see Figure 9 1 2 3 4 Ø5 6 mm Locking Locking the electrical operation 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 ...

Page 12: ... OFF Source not available I II ON Switch I or II closed OFF Switch I or II open Blinking Switching failure Auto ON Transfer switch in automatic mode Blinking Transfer switch in test mode or invalid setting OFF Transfer switch in manual mode EMRG OFF ON Receiving emergency signals OFF No emergency signals input Button Function Remarks I ON Transfer to LN1 Only available in automatic mode and remote...

Page 13: ...itching delay TBs The delay of switching from secondary line to primary line in automatic mode Choose from 0 5 10 20 30 60 120 300 600 and 900 seconds 2 Overvoltage threshold OV and under voltage threshold UV The benchmarks of the OV and UV are the rated voltage of the switch When the voltage is higher than the preset OV value or lower than the preset UV value the switch performs automatic transfe...

Page 14: ...imary line to secondary line in automatic mode Choose from 0 1 2 3 5 10 15 20 25 and 30 seconds 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 setting 7 Frequency...

Page 15: ...rator start Dry contact Generator start signal output When the secondary power is a generator they are used to start close signal and stop disconnect signal the generator After the switch transfers to the primary power the generator stop signal is sent after the preset delay for generator stop see the No 9 in section 4 3 for the generator stop delay setting 7 8 9 Switch status Dry contact Switch f...

Page 16: ...le 90 O I I O O II II O 180 I O II II O I OFF time 0 6 0 7 s Total transfer time 2 5 s Electromagnetic compatibility Class A 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 55 o C Transportation and storage...

Page 17: ...FER SWITCH OTM _C _ 21D Figure 16 Installation of OTM_C_21D screw Installation method The switch can be installed using screws or a DIN rail The fixed installation mode on the base board is as follows Installation 2 M4 4 ...

Page 18: ...ows First pry out the latch with an appropriate tool as shown in Figure 17 After attaching the switch to the DIN rail push the latch back to lock it Figure 18 Installation of OTM_C_21D DIN rail After attaching the switch to the DIN rail make sure you push the latch back to the lock position otherwise the switch may fall off Push ...

Page 19: ...19 AUTOMATIC TR ANSFER SWITCH OTM _C _ 21D Figure 19 Dimensions Technical data ...

Page 20: ...C _ 21D OTM32 125F2C21D OMZC03 OTM32 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 20 Bridging bars Bridging bars Optional accessories ...

Page 21: ...21D Figure 22 Auxiliary contact blocks Terminal shouds Auxiliary 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 ...

Page 22: ...ching failure in case of faulty power supply 1 Switch not operating in automatic mode 2 Both power supplies malfunctioning Make sure the switch working in automatic mode check and make sure both power supplies are not malfunctioning simultaneously 4 EMRG OFF function failure 1 Check if the EMRG OFF signal is 24V DC 2 Too short duration of EMRG OFF signal Correctly switch on the EMRG OFF signal whi...

Page 23: ...23 AUTOMATIC TR ANSFER SWITCH OTM _C _ 21D CZ ...

Page 24: ...B Oy Protection and Connection P O Box 622 FI 65101 Vaasa Finland abb com lowvoltage Copyright 2018 ABB All rights reserved Specifications subject to change without notice 34OTM_C_21D rev B 1SCC303015M0201 08 05 2018 ...

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