Lovato GLCMB0250T4A230 250A four-pole motorised changeover switch with a 208–277V AC motor operator for automatic mains and generator power transfer systems.
£1,582.42
The Lovato GLCMB0250T4A230 is a heavy-duty 250 A four-pole motorised changeover switch engineered for the automatic transfer of electrical loads between two independent power sources. As part of the dependable Lovato GLCM motorised changeover switch range, it is designed for automatic transfer switch (ATS) systems, standby generator installations and demanding industrial or commercial power distribution applications.
Fitted with an integrated 208–277 V AC motor operator, the GLCMB0250T4A230 enables reliable remote operation using compatible ATS controllers, PLCs and building management systems. Automated switching improves operational safety, reduces downtime and helps ensure continuous power to critical electrical equipment.
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, this motorised changeover switch is ideal for applications requiring complete isolation of all three phases together with the neutral conductor.
Motorised changeover switches automatically transfer electrical loads between primary and standby power sources, helping minimise interruptions during power failures. The integrated motor operator allows remote or automatic control through compatible transfer controllers, providing a dependable solution for critical electrical installations.
The four-pole configuration switches all three phase conductors together with the neutral conductor, providing complete electrical separation between power sources where required. This makes the GLCMB0250T4A230 well suited to commercial buildings, manufacturing plants, healthcare facilities, data centres and other mission-critical applications.
| Current | 250 A |
|---|---|
| Voltage | 690 V |
| Phase | Three Phase |
| IP Rating | IP00 |
| Manufacturer | Lovato Electric |
| Series | GLCM Motorised Changeover Switches |
| Model | GLCMB0250T4A230 |
| Product type | Motorised changeover switch |
| Number of poles | 4 |
| Conventional thermal current (Ith) | 250 A |
| Maximum operating voltage | 690 V AC |
| Motor operating voltage | 208–277 V AC |
| Motor operating voltage range | 166–332 V AC |
| Rated motor current | 0.36–0.44 A |
| In-rush current | 0.9–1.1 A |
| Operating time (I-O / O-I) | 0.55–0.89 s |
| Operating time (I-O-II / II-O-I) | 1.0–1.4 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 | 8013975326794 |
| HS Code | 85365080 |
The GLCMB0250T4A230 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 208–277 V AC supply and operates within a range of 166–332 V AC.
The four-pole configuration switches all three phases together with the neutral conductor, providing complete electrical separation between power sources.
Yes. The GLCMB0250T4A230 is designed for integration into automatic transfer switch systems using compatible controllers and PLCs.
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...