A device designed to ensure safe generator operation within a residential or commercial electrical system, this mechanism prevents the simultaneous energization of a generator and the utility power grid. It typically involves a physical barrier that allows only one of two circuit breakers the main breaker or the generator breaker to be in the ‘on’ position at any given time. For instance, if utility power is lost, a homeowner could switch off the main breaker and then switch on the generator breaker to power essential circuits within the building, but the interlock prevents accidental backfeeding onto the power grid.
The primary benefit of such a system is safety. Preventing backfeeding protects utility workers from potentially lethal electrical hazards during power outages. Furthermore, it safeguards the generator itself from potential damage caused by unexpected surges when utility power is restored. The development of these safety devices has parallels to the rise of home generators and the increasing demand for uninterrupted power supply. Their use provides peace of mind and ensures compliance with electrical safety codes.
