Lovato GLCMB0250T4D024 250A four-pole motorised changeover switch with a 24V DC motor operator for automatic mains and generator power transfer systems.
£1,582.42
The Lovato GLCMB0250T4D024 is a heavy-duty 250 A four-pole motorised changeover switch designed to automatically transfer electrical loads between two independent power sources. As part of the proven Lovato GLCM motorised changeover switch range, it provides dependable automatic switching for standby generator systems, automatic transfer switch (ATS) panels and industrial power distribution applications.
This model incorporates an integrated 24 V DC motor operator, making it ideal for use with DC-powered control systems, PLCs and automatic transfer controllers. The motorised mechanism enables fast, reliable remote operation while helping minimise downtime and maintain continuity of supply to critical electrical loads.
With a conventional free-air thermal current rating of 250 A, a four-pole switching configuration and suitability for systems up to 690 V AC, the GLCMB0250T4D024 is designed for installations where complete isolation of all three phases and the neutral conductor is required.
Motorised changeover switches automatically transfer electrical loads between primary and standby power supplies without manual intervention. When combined with a compatible ATS controller, the switch can detect a supply failure, initiate generator operation and transfer the electrical load safely and efficiently.
The four-pole configuration switches all three phase conductors together with the neutral conductor, providing complete isolation between power sources where required by the installation design. This makes the GLCMB0250T4D024 suitable for commercial buildings, manufacturing facilities, healthcare environments, data centres and critical infrastructure.
| Current | 250 A |
|---|---|
| Voltage | 690 V |
| Phase | Three Phase |
| IP Rating | IP00 |
| Manufacturer | Lovato Electric |
| Series | GLCM Motorised Changeover Switches |
| Model | GLCMB0250T4D024 |
| Product type | Motorised changeover switch |
| Number of poles | 4 |
| Conventional thermal current (Ith) | 250 A |
| Maximum operating voltage | 690 V AC |
| Motor operating voltage | 24 V DC |
| Motor operating voltage range | 19.2–31.2 V DC |
| Rated motor current | 2.7–3.3 A |
| In-rush current | 5.4–6.6 A |
| Operating time (I-O / O-I) | 0.55–0.89 s |
| Operating time (I-O-II / II-O-I) | 0.98–1.40 s |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated operational power (AC-23A, 400 V) | 140 kW |
| Rated operational power (AC-23A, 690 V) | 250 kW |
| Conditional short-circuit current | 100 kA |
| Recommended fuse | gG 250 A |
| Power dissipation per pole | 6.5 W |
| Mechanical endurance | 20,000 cycles |
| Main terminal conductor size | 70–185 mm² |
| Auxiliary terminal conductor size | 0.2–2.5 mm² |
| Maximum control cable length | 100 m |
| Protection rating | IP00 |
| Operating temperature | -25 to +55 °C |
| Storage temperature | -40 to +70 °C |
| Maximum altitude | 3000 m |
| Mounting | Screw fixing |
| Dimensions (H × W × D) | 371 × 253 × 220 mm |
| Weight | Approx. 8.2 kg |
| EAN | 8013975326695 |
| HS Code | 85365080 |
The GLCMB0250T4D024 automatically transfers electrical loads between two independent power sources, such as a utility supply and a standby generator.
The switch has a conventional IEC thermal current rating of 250 A.
The integrated motor operator is designed for a 24 V DC supply and operates within a voltage range of 19.2–31.2 V DC.
The four-pole design switches all three phases together with the neutral conductor, providing complete electrical separation between the two power sources.
Yes. It is designed for use with compatible automatic transfer controllers and PLCs to provide fully automated power-source transfer.
It complies with IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1.
Lovato motorised changeover switches are trusted by switchboard manufacturers, electrical contractors, OEMs and industrial engineers for dependable automatic power transfer in commercial and industrial electrical installations.
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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...