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OTM400E4CM24D ABB 400A 4-Pole Motorised Changeover Switch 24V DC
ABB OTM400E4CM24D is a 400 A four-pole open-transition motorised changeover switch with a 24 V DC motor operator for industrial and commercial electrical power source transfer applications.
£2,995.32
Why Choose the ABB OTM400E4CM24D Motorised Changeover Switch?
The ABB OTM400E4CM24D is a heavy-duty 400 A four-pole motorised changeover switch designed for controlled transfer between two electrical power sources. As part of the ABB OT motorised changeover switch range, it combines robust high-current switching with an integrated motor operator for remote source selection in industrial, commercial and infrastructure power distribution systems.
The OTM400E4CM24D provides open-transition changeover operation, disconnecting one source before the alternative source is connected. Its integrated motor operator enables remote electrical switching, while the supplied handle provides manual operating capability when required. ABB also supplies the unit with a bolt kit, nuts and washers for the terminals and male connectors for the control circuits.
With a rated current of 400 A, a four-pole configuration and a 24 V DC motor operating voltage, the OTM400E4CM24D is suitable for mains/generator changeover, standby power systems and alternative supply selection. Its four-pole construction enables four conductors to be switched as part of the source-transfer arrangement.
Key Advantages
- Heavy-duty 400 A motorised changeover switching for high-current power distribution.
- Four-pole configuration for applications requiring four switched conductors.
- 24 V DC motor operator suitable for low-voltage control systems.
- Open-transition operation disconnects one source before connecting the alternative supply.
- Integrated motor operator enables remote electrical source selection.
- Manual operating handle provides local switching capability when required.
- ABB OT construction designed for integration into switchboards and electrical distribution assemblies.
Key Features
- ABB OT motorised changeover switch range.
- 400 A rated current.
- 4-pole switching configuration.
- 24 V DC motor operating voltage.
- Open-transition changeover operation.
- 275 kVA rated power AC-31B at 400 V.
- 400 A AC-21A / AC-22A rated current at up to 415 V.
- 400 A AC-31B rated current at 415 V.
- 1000 V rated insulation voltage (Ui).
- 12 kV rated impulse withstand voltage (Uimp).
- 15 kA rated short-time withstand current (Icw).
- IP20 front protection.
Reliable Motorised Power Source Changeover
Motorised changeover switches such as the ABB OTM400E4CM24D provide a controlled method of transferring electrical loads between two independent power sources. The open-transition arrangement disconnects the active source before connecting the alternative supply, maintaining separation between the two sources during the transfer process.
The integrated 24 V DC motor operator enables remote switching from an appropriate transfer-control or power-management system, while the supplied manual operating handle allows local control when required. This combination makes the OTM400E4CM24D suitable for installations requiring dependable four-pole source selection with both motorised and manual operating capability.
Typical Applications
- Mains and generator power source changeover systems.
- Standby and emergency power distribution.
- Industrial electrical switchboards.
- Commercial building power distribution systems.
- Alternative supply selection systems.
- Four-pole power transfer installations requiring remote motorised operation.
Technical Specifications
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| Operation | Motorised | |
|---|---|---|
| Device Type | Motorised changeover switch | |
| Series | OT Motorised Changeover Switches | |
| ABB product ID | 1SCA022847R2950 | |
| Product type | Motorised changeover switch | |
| Rated current | 400 A | |
| Number of poles | 4 | |
| Motor operating voltage | 24 V DC | |
| Transition type | Open transition | |
| Rated current AC-21A / AC-22A at ≤415 V | 400 A | |
| Rated power AC-31B at 400 V | 275 kVA | |
| Rated current AC-31B at 415 V | 400 A | |
| Rated insulation voltage (Ui) | 1000 V | |
| Rated impulse withstand voltage (Uimp) | 12 kV | |
| Rated short-time withstand current (Icw) | 15 kA | |
| Rated operational power AC-23 at 400 V | 220 kW | |
| Protection rating | IP20 front | |
| Main circuit connection | Screw connection | |
| Operating mechanism | Mechanism at the end of the switch | |
| Line terminal arrangement | Top in / bottom out | |
| Manual operation | Handle supplied | |
| Terminal bolt kit | M10 × 30 | |
| Dimensions (H × W × D) | 185 × 367 × 235 mm | |
| Weight | 12.5 kg |
Frequently Asked Questions
What is the ABB OTM400E4CM24D used for?
The ABB OTM400E4CM24D is used for motorised changeover between two electrical power sources in industrial, commercial and standby power distribution systems.
What is the rated current of the OTM400E4CM24D?
The OTM400E4CM24D has a rated current of 400 A.
How many poles does the ABB OTM400E4CM24D have?
The OTM400E4CM24D has a four-pole configuration, allowing four conductors to be switched as part of the source-transfer arrangement.
What motor operating voltage does the OTM400E4CM24D use?
The integrated motor operator is designed for a 24 V DC supply.
What is the power rating of the OTM400E4CM24D at 400 V?
The OTM400E4CM24D has a rated power of 275 kVA under AC-31B at 400 V and an AC-23 operational power rating of 220 kW at 400 V.
Is the ABB OTM400E4CM24D an open-transition changeover switch?
Yes. The OTM400E4CM24D provides open-transition switching, so the active source is disconnected before the alternative power source is connected.
Trusted by Electrical Distribution Professionals Worldwide
ABB OT motorised changeover switches are designed for dependable power source transfer, combining robust high-current switching, remote motorised operation and manual operating capability for industrial and commercial electrical distribution systems.
