L&T Onload Changeover Switch

L&T Onload Changeover Switch – Reliable Power Source Transfer Solution

The L&T Onload Changeover Switch is engineered for safe and smooth transfer of electrical loads between two power sources—typically from the utility grid to a backup generator—without interrupting the power supply. Built with precision and reliability, it ensures operational continuity and protection in power-critical environments.

Key Features at a Glance

• On-load operation: Seamlessly transfers live loads between two sources for uninterrupted power.

• Source switching: Ideal for switching between mains and generator, or between dual transformers.

• Control options: Available in manual (handle-operated) and motorized (automatic) models.

• Construction & protection:

  • Open execution: Panel-mounted, IP20 protection.

  • Sheet steel enclosure: IP54 protection, gland plates for easy cabling.

• Safety assured: Mechanical/electrical interlocks prevent simultaneous source connection.

• Robust performance: Double-break, self-wiping knife contacts ensure durability under fault conditions.

• Flexible installation: External shorting links can be reconfigured as needed.

• Upgradeable design: Fuse conversion kit enables on-site transformation to a fused version for overload protection.

Why Choose This Product

When power reliability is non-negotiable, L&T’s Onload Changeover Switch delivers dependable performance with superior safety and engineering precision. Its versatile configuration—manual or motorized, open or enclosed—makes it suitable for a wide range of industrial and commercial setups. Built to L&T’s exacting standards, it ensures long service life, minimal maintenance, and seamless transition between power sources.

Ideal For

• Industrial control panels

• Commercial and residential backup systems

• Data centers and telecom installations

• Hospitals and emergency facilities

• Power distribution boards and switchgear panels

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FAQs

1. What is the difference between on-load and off-load changeover switches?
On-load switches can safely transfer power while the load is active, whereas off-load switches require the load to be disconnected before switching.

2. Can this switch be used for generator applications?
Yes, it’s commonly used to switch between the main grid supply and a standby generator.

3. Does the motorized version allow automatic power transfer?
Yes, the motorized version supports automatic operation for seamless transition between sources during power failure.