Description
Manual or automatic changeover — which does a building need?
A manual changeover switch requires someone to physically switch the load between mains and generator; an automatic transfer switch (ATS) senses a mains failure and switches to the generator on its own, then switches back once mains power is restored, without operator action.
- Manual changeover — lower cost, suitable where someone is always on-site to operate it (most Nigerian residential and small commercial installs)
- Automatic transfer switch (ATS) — switches without human intervention, standard on hospitals, data centres, and buildings that can’t tolerate a delay in generator start
What current ratings does Fembosco stock?
ABB changeover switches are available across a wide current range to match generator and building load size, from small residential ratings up to industrial capacities.
Fembosco’s technical team sizes the changeover switch to the building’s actual maximum demand and generator capacity, not just the incoming mains breaker size, to avoid an undersized switch that fails under real load.
Frequently Asked Questions
Can a changeover switch be added to an existing installation without rewiring the whole building?
In most cases yes — a changeover switch is fitted at the main incomer point ahead of the existing distribution board, without requiring a full rewire, though this should be confirmed on site.
Does Fembosco install the changeover switch or supply it only?
Fembosco supplies the switch and can coordinate installation through its panel-building and site engineering team on request.
