3P Surge Protection Device Flame Retardant PC Material Voltage Protection Limiter Module 60KA 420V 1. Basic Values: This surge protection device has Uc 420V, Imax 60KA, W 30KA and working environment temperature of -40 deg; c to + 80 deg; c.2. Working principle: under normal conditions, the protection device is in the state of high resistance, when the grid due to thunder or other reasons to deal with the overvoltage surge, the surge protector will immediately in a nanosecond time quickly conduct, the overvoltage surge to the ground, thus protecting the electrical equipment on the grid.3. Normal recovery: when the surge voltage through the protection device, and after the overvoltage disappears, the protection device will return to the high resistance state, so as not to affect the normal operation of the network.4. Transient Limit: The surge protection device is mainly used to limit the transient amplitude of overvoltage, absorption, consumption or discharge of inrush current energy. Make the overvoltage category in higher situations, can make the protected electrical components from the overvoltage category to another lower overvoltage category.5. Usage Scenario: In the 3-phase and 4-wire system, the 3-phase wires and the neutral wire to ground are connected between the protection device and are suitable for home, farm, office building and so on. Specification: Item Type: Surge Protection Device Material: fireproof PCMounting: 35mm (1.4 inch) electric railUc: 420VImax: 60KAW: 30KAUp: le; 2.2kv Operating ambient temperature: -40 to +80Package list: 1 x surge protection device