The SPD normally is installed in the building power distribution box, computer center,telecom room, elevator control room, wiring tv room, building control room, security monitor center, fire control center ,industry control room, frequency converter equipment control room, hospital surgery room, monitoring room and the distribution box in whichelectronic mechanical equipment.

The SPD has Invalid tripping device,Alarming apparatus,Remote signal contact

SPD is mainly used in AC 50HZ, rated operating voltage 380V and below TN-S, TN-C, TN-C-S, TT, IT and other electrical lines to limit the transient overvoltage amplitude, absorb, consume or discharge surge current energy.