Related Manuals for ABB OTM C 21D
Summary of Contents for ABB OTM C 21D
- Page 1 34OTM_C_21D rev. B / EN / 1SCC303015M0201 Automatic Transfer Switch OTM_C_21D Installation and operating instructions...
- Page 2 Read 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.
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Page 3: Table Of Contents
7.1 Bridging bars ............................19 7.2 Terminal shrouds ..........................20 7.3 Auxiliary contact blocks ........................21 8. Maintenance and common troubleshooting ............22 8.1 Maintenance ............................22 8.2 Common troubleshooting ........................22 9. Appendix ........................23 9.1 Wiring diagram ............................23 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 4: Symbols & Terms
Remote test A sequence to test the functionality of the automatic transfer switch Switching delay Back switching delay Adjustable overvoltage threshold Adjustable undervoltage threshold Table 1. Explanations of abbreviations and terms 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 5: Product Overview
5. Voltage sensing connections 10. Rotary switches 6. Locking clip for padlock 11. Connecting terminal The standard package includes: 1. automatic transfer switch, 2. handle, 3. handle storage clip and 4. terminal plug. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 6: Otm_C_21D Switching Sequence
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 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 7: Manual Back Switching Mode
An anomaly occurs on the Line 2 (LN2) • Change-over switch stays in position II • Change-over switch can be transferred manually back to position I Figure 4. Automatic Switching Sequences in OTM_C_21D, Manual back switching mode 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 8: Quick Start
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. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 9: Automatic Operation
2. Automatic operation includes three operating modes: Line 1 priority (factory default setting), No line priority, and manual back switching mode. Figure 6. Selecting the automatic transfer OTM_C_21D switch to Auto Mode 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 10: System Testing
In the test sequence, the main power supply circuit will be closed. If the test sequence is interrupted due to power failure, the automatic transfer switch will enter "automatic mode" after power recovery. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 11: Locking
By default, the manual operation can only be locked in position 0. The handle can be padlocked by pulling out the clip from the handle and place the padlock on the handle see Figure 9. Ø5-6 mm Figure 9. Locking the manual operation 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 12: Interface And Settings
Transfer switch in automatic mode Blinking Transfer switch in test mode or invalid setting Transfer switch in manual mode EMRG OFF Receiving emergency signals No emergency signals input Table 3. LEDs 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 13: Rotary Switch Setting
The value of OV can be 5%, 10%, 15%, 20%, 25%, and 30%. The value of UV can be 5%, 10%, 15%, 20%, 25%, and 30%. Figure 13. Rotary switch, OV and UV 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 14: Dip Switch Setting
The 9-bit dial is used to control the switch for circuit testing, and the mismatch with the load power supply will result in testing and transfer failure. Therefore,carefully read this guide and set correct parameters based on the actual situation before using this product. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 15: Terminal Outputs And Inputs
OFF mode or fault recovered. Output Output contact relays are dry contactz and therefore external voltage supply is contacts required. 24VDC or up to 250VAC max. 3A AC1 Table 5. Terminals 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 16: Technical Data
6.1. Installation method The switch can be installed using screws or a DIN rail. The fixed installation mode on the base board is as follows: Figure 16. Installation of OTM_C_21D, screw. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... - Page 17 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. 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B...
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Page 18: Installation Dimensions
6. Installation 6.2. Installation dimensions Figure 19. Dimensions 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 19: Optional Accessories
7.1 Bridging bars OTM32-125F2C21D OMZC03 OTM32-125F3C21D OTM32-125F4C21D OMZC04 6 Nm Number of conductors permitted to be clamped on the terminal ≤2 Wire specification: 10-70 mm², 8-00 AWG Figure 20. Bridging bars 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 20: Terminal Shrouds
7. Optional accessories 7.2 Terminal shrouds OTS125T3 OTS125T1 OTS125T1 Figure 21. Terminal shrouds 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 21: Auxiliary Contact Blocks
7. Optional accessories 7.3 Auxiliary contact blocks OA710/OA1G01 0.75…2.5 mm² 18……14 AWG 0.8 Nm OA1G10 OA8G01 OA7G10 OA1G01 Contact type Contact type Figure 22. Auxiliary contact blocks 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 22: Maintenance And Common Troubleshooting
Position “O”, and press the expected result not “AUTO” button to reset achieved Power supply Wrong connection of the N Re-connect the wires functioning normally wire and LED blinks Table 7. Troubleshooting 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... -
Page 23: Appendix
9. Appendix 9. Appendix 9.1 Wiring diagram Figure 23. Wiring Diagram 1SCC303015M0201 l ABB Installation and operating instructions, 34OTM_C_21D rev. B... - Page 24 The technical data and dimensions are valid at the time of printing. We reserve the right to make subsequent alterations. For more information please contact: ABB Oy, Protection and Connection P.O. Box 622, FI-65101 Vaasa, Finland new.abb.com/low-voltage...