Havells changeover switch is designed to transfer a house (or business) electricity from the commercial power grid to a local generator when an outage occurs. They connect directly to the generator, commercial power supply or line, and the house. When the homeowner or business owner experiences a power outage, he or she can switch over to the generator via a changeover switch.
It comes in different amperages:
32amps
63amps
100amps
125amps
200amps
400amps
630amps
800amps
1000amps
1200amps
1600amps
2000amps