Lovato GLCMB0250T4E110 250A four-pole motorised changeover switch with a 110–125V AC/DC motor operator for automatic mains, generator and alternative power-source transfer systems.
£1,582.42
The Lovato GLCMB0250T4E110 is a heavy-duty 250 A four-pole motorised changeover switch designed for the controlled transfer of electrical loads between two independent power sources. Part of the proven Lovato GLCM motorised changeover switch range, it provides a dependable solution for automatic transfer switch panels, standby generator systems and industrial power distribution installations.
An integrated 110–125 V AC/DC motor operator allows the GLCMB0250T4E110 to be operated remotely through a compatible automatic transfer controller, PLC or building management system. Motorised switching reduces the need for manual intervention, improves operating safety and helps restore power efficiently when the preferred electrical supply is unavailable.
With a conventional free-air thermal current rating of 250 A, a four-pole switching configuration and suitability for electrical systems up to 690 V AC, this Lovato changeover switch is ideal for installations requiring all three phases and the neutral conductor to be transferred together.
A motorised changeover switch provides a controlled method of transferring an electrical load between two power sources, typically a utility supply and a standby generator. When connected to a compatible automatic transfer controller, the system can monitor the incoming supplies and initiate a transfer when the preferred source fails or falls outside its permitted operating limits.
The GLCMB0250T4E110 provides clearly defined source I, OFF and source II switching positions. Its four-pole arrangement transfers all three phase conductors together with the neutral, supporting installations where complete electrical separation between the two supplies is required.
| Current | 250 A |
|---|---|
| Voltage | 690 V |
| Phase | Three Phase |
| IP Rating | IP00 |
| Manufacturer | Lovato Electric |
| Series | GLCM Motorised Changeover Switches |
| Model | GLCMB0250T4E110 |
| Product type | Motorised changeover switch |
| Number of poles | 4 |
| Conventional free-air thermal current (Ith) | 250 A |
| Rated operational current (AC-23A at 400 V) | 250 A |
| Rated operational current (AC-23A at 690 V) | 250 A |
| Maximum operating voltage | 690 V AC |
| Motor rated operational voltage | 110–125 V AC/DC |
| Motor operating voltage range | 77–165 V AC/DC |
| Rated motor current | 0.72–0.88 A |
| Motor inrush current | 1.8–2.2 A |
| Rated insulation voltage (Ui) | 1000 V |
| Rated impulse withstand voltage (Uimp) | 12 kV |
| Rated operational power (AC-23A at 400 V) | 140 kW |
| Rated operational power (AC-23A at 690 V) | 250 kW |
| Conditional short-circuit current | 100 kA |
| Recommended fuse | gG 250 A |
| Maximum power dissipation | 6.5 W per pole |
| Mechanical endurance | 20,000 cycles |
| Maximum continuous switching rate | 1 cycle per minute |
| Main conductor capacity | 70–185 mm² |
| Main terminal tightening torque | 15–22 Nm |
| Auxiliary conductor capacity | 0.2–2.5 mm² |
| Maximum control cable length | 100 m |
| Protection rating | IP00 |
| Pollution degree | 3 |
| Operating temperature | -25 to +55 °C |
| Storage temperature | -40 to +70 °C |
| Maximum operating altitude | 3000 m |
| Normal mounting position | Vertical plane |
| Permitted mounting position | Any |
| Fixing method | Screw mounting |
| Package dimensions | 371 × 253 × 220 mm |
| Package weight | Approx. 8.2 kg |
| EAN | 8013975326749 |
| Standards | IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1 |
| HS Code | 85365080 |
The GLCMB0250T4E110 is used to transfer an electrical load between two independent power sources, such as a utility supply and a standby generator. Its integrated motor operator enables remote or automatic switching.
The switch has a conventional free-air thermal current rating of 250 A. Final product selection should also consider the utilisation category, system voltage, conductor size and protective-device requirements.
The integrated motor operator is rated for a 110–125 V AC/DC control supply and has an operating voltage range of 77–165 V AC/DC.
The four-pole configuration switches all three phase conductors together with the neutral. This allows complete separation between the normal and alternative power sources where neutral switching is required.
Yes. The motorised switch can be combined with a compatible automatic transfer controller to create an ATS system for mains, generator or alternative power-source applications.
The GLCMB0250T4E110 is suitable for low-voltage AC systems with an operating voltage of up to 690 V AC.
The GLCMB0250T4E110 conforms to IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1.
Lovato motorised changeover switches provide switchboard manufacturers, electrical contractors, OEMs and system integrators with a dependable solution for automatic and remotely controlled power-source transfer.
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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...