Tronic Onload Enclosed Manual Changeover 400A, AC 415V

Our review

This Tronic unit is an enclosed onload manual changeover rated at 400 amps and AC 415 volts, sized for installations where two supply sources need to be switched under load rather than only when dead. It allows selection between two loads, provides emergency breaking, and lets you isolate downstream circuits safely for maintenance. It suits larger premises, workshops or sites running a generator alongside a mains supply, and anyone who wants a physical, hand-operated transfer rather than an automatic one. Before buying, confirm your total load stays within 400A, that your supply is 415V AC, and check the enclosure's height of 350mm and width of 455mm against the space and cable entry you have. Compare it with automatic changeovers, which cost more and need control wiring, and with smaller enclosed manual units if your load is lighter. The grey metal enclosure keeps live parts covered, which matters in dusty or busy plant rooms. Available on Sokonia.