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OTM250E4WCM230C ABB 250 A 4-Pole 230 V AC Motorised Change-Over Switch
ABB OTM250E4WCM230C is a 250 A four-pole motorised open-transition change-over switch with extended phase distance, I-O-II operation and an integrated 220–240 V AC motor operator for remote power source selection.
£2,165.39
Why Choose the ABB OTM250E4WCM230C Motorised Change-Over Switch?
The ABB OTM250E4WCM230C is a 250 A four-pole motorised change-over switch designed for controlled switching between two electrical power sources. Part of the ABB OT Change-over Switches range, it combines ABB's OT switching platform with an integrated motor operator for industrial, commercial and standby power distribution applications.
The OTM250E4WCM230C provides I-O-II open-transition operation, giving a defined OFF position between the two source positions so that one supply is disconnected before the alternative supply is connected. Its integrated 220–240 V AC motor operator is suitable for nominal 230 V AC control systems, while the included handle enables manual operation when required.
Rated at 250 A with a four-pole configuration, the OTM250E4WCM230C provides an AC-23A operational power rating of 140 kW at 400 V. The W version features extended phase distance, while the switch also offers a 1000 V rated operational voltage and robust short-time withstand capability for demanding power transfer installations.
Key Advantages
- 250 A motorised change-over switching for remote power source selection.
- Four-pole configuration for simultaneous switching of four conductors.
- Integrated 220–240 V AC motor operator for nominal 230 V AC control systems.
- I-O-II open-transition operation provides a defined OFF position between sources.
- Extended phase distance construction provides increased spacing between phases.
- Supports both motorised and manual operation.
- 250 A AC-23A rating at 380–415 V, 500 V and 690 V.
- 140 kW AC-23A operational power at 400 V.
Key Features
- ABB OT Change-over Switches product group.
- 250 A rated operational current.
- 4-pole configuration.
- Integrated 220–240 V AC motor drive.
- I-O-II open-transition change-over operation.
- Extended phase distance construction.
- 250 A AC-21A rating at 500 V and 690 V.
- 250 A AC-22A rating at 500 V and 690 V.
- 250 A AC-23A rating at 380–415 V, 500 V and 690 V.
- 140 kW AC-23A operational power at 400 V.
- 1000 V rated operational and insulation voltage.
- 12 kV rated impulse withstand voltage.
- 8 kA rms short-time withstand current for 1 s.
Reliable 230 V AC Motorised Power Source Change-Over
Motorised change-over switches such as the ABB OTM250E4WCM230C enable electrical power sources to be selected remotely without requiring routine manual switching at the electrical panel. The integrated 220–240 V AC motor operator actuates the switch while its I-O-II open-transition arrangement provides a defined electrical break between the two source positions during transfer.
The OTM250E4WCM230C combines a 250 A rating with four-pole switching and extended phase distance. ABB supplies the switch with a handle for manual operation, a bolt kit with nuts and washers for all terminals and male connectors for the control circuits, providing the principal operating and connection hardware for switchboard integration.
Typical Applications
- Motorised mains-to-generator change-over systems.
- Standby and alternative power supply switching.
- Industrial electrical distribution systems.
- Commercial building power distribution.
- Switchboards and electrical distribution panels.
- Remote 230 V AC controlled source-selection systems.
Technical Specifications
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| Operation | Motorised | |
|---|---|---|
| Device Type | Motorised changeover switch | |
| Product group | OT Change-over Switches | |
| Product ID / SKU | 1SCA022846R8250 | |
| EAN | 6417019297514 | |
| Product type | Motorised change-over switch | |
| Rated operational current | 250 A | |
| Number of poles | 4 | |
| Motor operational voltage | 220–240 V AC | |
| Motor operating voltage range | 0.85–1.1 × rated motor voltage | |
| Motor drive | Integrated | |
| Operation | I-O-II | |
| Operating angle | 180° for I-O-II operation | |
| Transition type | Open transition | |
| Phase spacing | Extended phase distance | |
| AC-21A rated current at 500 V | 250 A | |
| AC-21A rated current at 690 V | 250 A | |
| AC-22A rated current at 500 V | 250 A | |
| AC-22A rated current at 690 V | 250 A | |
| AC-23A rated current at 380–415 V | 250 A | |
| AC-23A rated current at 500 V | 250 A | |
| AC-23A rated current at 690 V | 250 A | |
| AC-23A operational power at 220–240 V | 75 kW | |
| AC-23A operational power at 400 V | 140 kW | |
| AC-23A operational power at 500 V | 170 kW | |
| AC-23A operational power at 690 V | 250 kW | |
| Rated apparent power at 400 V | 170 kVA | |
| Rated operational voltage | 1000 V | |
| Rated insulation voltage | 1000 V | |
| Rated impulse withstand voltage | 12 kV | |
| Rated short-time withstand current | 8 kA rms for 1 s | |
| Conventional free-air thermal current | 250 A at 40 °C | |
| Conventional enclosed thermal current | 250 A | |
| Switch operating mechanism | Mechanism at the end of the switch | |
| Line terminal position | Top in / bottom out | |
| Front protection | IP20 | |
| NEMA protection | Type 1 | |
| Pollution degree | 3 | |
| Motor operating temperature | -5 to +40 °C | |
| Power loss | 6.5 W | |
| Manual operation | Handle included | |
| Terminal hardware | Bolt kit with nuts and washers included | |
| Control-circuit connections | Male connectors included | |
| Dimensions (W × H × D) | 339 × 170 × 197 mm | |
| Net weight | approx. 7.9 kg |
Frequently Asked Questions
What is the ABB OTM250E4WCM230C used for?
The ABB OTM250E4WCM230C is a motorised change-over switch designed for controlled switching between two electrical power sources in industrial, commercial and standby power distribution systems.
What is the current rating of the ABB OTM250E4WCM230C?
The OTM250E4WCM230C has a rated operational current of 250 A, including a 250 A AC-23A rating at 380–415 V, 500 V and 690 V.
What voltage is required for the OTM250E4WCM230C motor operator?
The integrated motor operator is designed for a 220–240 V AC operating supply, making it suitable for nominal 230 V AC control systems.
What does the W in OTM250E4WCM230C indicate?
The W version features extended phase distance, providing increased spacing between the electrical phases compared with the corresponding standard-phase-distance version.
What is the switching power of the ABB OTM250E4WCM230C at 400 V?
The OTM250E4WCM230C has an AC-23A operational power rating of 140 kW at 400 V, with a rated operational current of 250 A.
Trusted ABB Motorised Switching Technology
ABB OTM motorised change-over switches combine established OT switching technology with integrated motor operation, providing dependable remote source selection for industrial, commercial and standby power distribution systems.
