ABB OTM250E4WC3D230C automatic transfer switch with 250 A current rating, 4-pole switching configuration, wide phase distance terminals and 220–240 V AC motor operation for industrial and commercial power transfer systems.
£2,641.46
The ABB OTM250E4WC3D230C is a compact and highly dependable automatic transfer switch (ATS) engineered for reliable source switching in industrial, commercial and standby power systems. As part of the advanced ABB OTM motorised change-over switch range, this switch automatically transfers electrical loads between mains and backup power supplies to help maintain uninterrupted operation of essential systems during power interruptions.
Designed for demanding low-voltage power distribution environments, the ABB OTM series combines intelligent motorised operation, robust switching capability and compact switchboard-friendly construction. ABB transfer switches are trusted worldwide by electrical engineers, panel builders and industrial contractors for installations requiring dependable automatic source transfer and operational continuity.
With a 250 A operational current rating, 4-pole switching configuration, wide phase distance terminals and a 220–240 V AC motor operating voltage, the OTM250E4WC3D230C is ideal for automatic mains-to-generator transfer systems, industrial switchboards and commercial backup power installations. The integrated OMD300 automatic controller and voltage sensing functionality ensure dependable and efficient operation in demanding environments.
Automatic transfer switches such as the ABB OTM250E4WC3D230C continuously monitor available power sources and automatically transfer electrical loads during mains failures or generator startup events. This helps minimise downtime while maintaining continuity for essential systems and infrastructure.
The ABB OTM range is widely used in industrial facilities, generator installations and low-voltage power distribution systems where dependable automatic source transfer and compact switchboard integration are essential. Its integrated motorised mechanism, voltage sensing functionality and OMD300 controller simplify installation while improving operational reliability.
| Power | 75 kW |
|---|---|
| Current | 250 A |
| Phase | Three Phase |
| IP Rating | IP20 |
| Series | OTM Motorised Change-over Switches |
| Product type | Automatic transfer switch |
| Rated operational current | 250 A |
| Number of poles | 4P |
| Motor operational voltage | 220–240 V AC |
| Controller type | OMD300 |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated operational voltage | 1000 V AC |
| Frequency | 50 / 60 Hz |
| Short-time withstand current | 8 kA for 1 second |
| Rated operational power AC-23A | 75 kW at 230 V, 132 kW at 400 V, 160 kW at 500 V, 250 kW at 690 V |
| Mounting type | Base mounting |
| Protection rating | Front IP20 |
| Transition type | Open transition |
| Terminal configuration | Wide phase distance |
| Position of line terminals | Top in - Bottom out |
| Fourth pole type | Switched simultaneous function |
| Dimensions (H × W × D) | approx. 300 × 339 × 197 mm |
| Weight | approx. 11 kg |
This automatic transfer switch is used to automatically transfer electrical loads between mains and backup power supplies such as generators.
The switch supports a rated operational current of 250 A for industrial and commercial low-voltage systems.
The motor operated mechanism requires a 220–240 V AC supply.
Yes. The 4-pole configuration allows simultaneous switching of all conductors including the neutral connection.
The “W” version includes a wide phase distance terminal arrangement that improves cable routing and installation flexibility in switchboards and generator panels.
ABB OTM automatic transfer switches are trusted worldwide for dependable source transfer performance, compact construction and reliable operation in critical power systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...