Lovato GLCMB0250A230 motorised three-pole changeover switch with a 250 A IEC thermal current rating and 208–277 V AC motor supply.
£1,550.34
The Lovato GLCMB0250A230 is a premium motorised three-pole changeover switch designed for reliable automatic transfer between two independent power sources. Rated at 250 A with a 208–277 V AC motor supply, it is ideal for automatic transfer switch (ATS) panels, standby generator systems and critical power distribution applications in commercial and industrial installations.
As part of the proven Lovato GLCM series, this motorised changeover switch combines a durable mechanical switching mechanism with dependable motor-driven operation to provide safe, break-before-make source transfer. Its compact design simplifies switchboard integration whilst delivering exceptional reliability and a long operating life.
Manufactured in accordance with IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1, the GLCMB0250A230 offers high short-circuit withstand capability, robust electrical performance and dependable automatic transfer for demanding power applications.
The GLCMB0250A230 employs a motor-driven break-before-make switching mechanism that safely transfers electrical loads between two independent power sources. The active supply is disconnected before the alternative source is connected, preventing both supplies from being paralleled and ensuring safe operation during every transfer.
Its 208–277 V AC motor operator is designed for seamless integration with automatic transfer controllers, making it ideal for generator installations, industrial power systems and commercial standby power applications.
| Current | 250 A |
|---|---|
| Voltage | 690 V |
| Phase | Three Phase |
| IP Rating | IP00 |
| Manufacturer | Lovato Electric |
| Series | GLCM |
| Model | GLCMB0250A230 |
| Product type | Motorised changeover switch |
| Number of poles | 3 |
| IEC conventional free-air thermal current (Ith) | 250 A |
| Motor operating voltage | 208–277 V AC |
| Operating voltage range | 166–332 V AC |
| Motor rated current | 0.36–0.44 A |
| Motor inrush current | 0.9–1.1 A |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| AC-21A operational current | 250 A at 400, 500 and 690 V |
| AC-22A operational current | 250 A at 400, 500 and 690 V |
| AC-23A operational current | 250 A at 400, 500 and 690 V |
| AC-31B operational current | 250 A |
| AC-32B operational current | 250 A |
| AC-33B operational current | 250 A |
| Rated operational power (AC-23A) | 140 kW at 400 V; 250 kW at 690 V |
| Maximum power dissipation | 6.5 W per pole |
| Conditional short-circuit current | 100 kA rms |
| Recommended fuse protection | 250 A gG fuse |
| Making capacity AC-23A (400 V) | 2500 A |
| Breaking capacity AC-23A (400 V) | 2000 A |
| Mechanical life | 20,000 cycles |
| I–O / O–I operating time | 0.55–0.89 seconds |
| I–O–II / II–O–I operating time | 1.0–1.4 seconds |
| Maximum continuous switching rate | 1 cycle per minute |
| Maximum short-time switching rate | 10 cycles per minute |
| Power terminals | M8 × 25 |
| Power conductor capacity | 70–185 mm² |
| Control conductor capacity | 0.2–2.5 mm² |
| Maximum control cable length | 100 m |
| Mounting | Screw fixing |
| Permitted operating position | Any |
| Operating temperature | -25°C to +55°C |
| Storage temperature | -40°C to +70°C |
| Maximum installation altitude | 3000 m |
| Weight | 7.2 kg |
| EAN | 8013975326640 |
| HS Code | 85365080 |
It automatically transfers electrical loads between two independent power sources, such as the mains supply and a standby generator.
The switch has an IEC conventional free-air thermal current rating of 250 A.
The motor operator requires a 208–277 V AC supply with an operating range of 166–332 V AC.
The GLCMB0250A230 has a three-pole configuration suitable for three-phase electrical systems.
Yes. It is specifically designed for integration into automatic transfer switch systems controlling utility and standby power supplies.
Lovato motorised changeover switches are trusted by panel builders, OEMs, electrical contractors and power system integrators worldwide for dependable automatic source transfer in commercial and industrial power distribution systems.
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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...
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...