high voltage protection device

Automatic, High Voltage Protection Device, with unit stop and extra information transmit port. For protecting equipment from generator / inverter over voltage failure. 30 Amp model suitable for direct use with up to 6KVA generators. Unlimited gen set / inverter capacity available if used with external indirect contactor. What does this product do and why do I need it? Generators, Inverters, the mains supply, or, any device which produces 230V AC, can and will, at some point, fail or have the inc