JVA Power and Signal Line Surge Protector suits Z SeriesThe JVA Power and Signal Line Surge Protector is the must have device when installing single zone Z Series Energizers in lightning prone areas. It provides protection for all of the low voltage connections to and from the energizer. This ensures that a lightning strike on, or near the cabling, is safely diverted to Earth. Its two stage protection can withstand a lightning surge of up to 250 Amps. Features: Protects the 16VAC, Keypad bus, inputs,