Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
GLCMB0250T4D024 Lovato 4 Pole 250A 690V Motorised Changeover Switch
Lovato GLCMB0250T4D024 250A four-pole motorised changeover switch with a 24V DC motor operator for automatic mains and generator power transfer systems.
£1,265.93
Why Choose the Lovato GLCMB0250T4D024 Motorised Changeover Switch?
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.
Key Advantages
- Motorised four-pole changeover switch for automatic source transfer.
- 250 A IEC thermal current rating for demanding commercial and industrial applications.
- 24 V DC motor operator for reliable DC control systems.
- Four-pole configuration switches phases and neutral simultaneously.
- Compatible with ATS controllers, PLCs and building management systems.
- Provides dependable switching between utility, generator and alternative power supplies.
- Long mechanical operating life with minimal maintenance.
- Suitable for professional switchboard and panel-building applications.
Key Features
- Lovato GLCM motorised changeover switch series.
- 250 A IEC conventional free-air thermal current.
- Four-pole switching mechanism.
- 24 V DC motor operating voltage.
- Motor operating voltage range: 19.2–31.2 V DC.
- Rated insulation voltage (Ui): 1000 V.
- Rated impulse withstand voltage (Uimp): 12 kV.
- Mechanical endurance: 20,000 operating cycles.
- Maximum continuous switching rate: 1 cycle per minute.
- Complies with IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1.
Reliable Automatic Source Transfer
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.
Typical Applications
- Automatic transfer switch (ATS) systems.
- Mains-to-generator changeover panels.
- Industrial power distribution.
- Commercial buildings.
- Data centres.
- Hospitals and healthcare facilities.
- Utilities and infrastructure.
- OEM electrical control panels.
- Emergency and standby power systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Power | 140 kW | |
|---|---|---|
| Device Type | Motorised changeover switch | |
| Operation | Motorised | |
| Mounting Type | Base mounting | |
| Current | 250 A | |
| Voltage | 690 V | |
| Phase | Three Phase | |
| IP Rating | IP00 | |
| Poles | 4-pole | |
| 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 |
Frequently Asked Questions
What is the Lovato GLCMB0250T4D024 used for?
The GLCMB0250T4D024 automatically transfers electrical loads between two independent power sources, such as a utility supply and a standby generator.
What is the current rating of this motorised changeover switch?
The switch has a conventional IEC thermal current rating of 250 A.
What control voltage does the motor require?
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.
Why is this a four-pole changeover switch?
The four-pole design switches all three phases together with the neutral conductor, providing complete electrical separation between the two power sources.
Can the GLCMB0250T4D024 be integrated into an ATS system?
Yes. It is designed for use with compatible automatic transfer controllers and PLCs to provide fully automated power-source transfer.
Which standards does this model comply with?
It complies with IEC/EN/BS 60947-3 and IEC/EN/BS 60947-6-1.
Trusted by Electrical Professionals
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.
