Surge Protection Device - Rated Voltage 275/440v | High Reliability, Automatic Switching, Durable Surge Handling

The Surge Protection Device consists of a semi-conductor valve element that opens at certain conditions. At normal conditions of the system,the surge arrestor has infinitely high resistance between the protected conductors and earthing circuit.At voltage increase due to atmospheric nature or system failure, the valve element opens and leads the excessive voltage to the grounded circuit.After reversion of the normal voltage the valve element closes. the arrestor can endure high momentary overloading.

Functions:
Protection of heavy-loaded electrical circuit from overload
used to protect not only particular consumers/circuits,but also the whole panel remarkable with high reliability of current characteristics
Control : automatic switching off at exit failure and recovery after eliminating the danger

Technical date:
Rated operating voltage Uc:the operating voltage of surge arrestor 275/440v;50Hz
Surge voltage Up:the voltage created in surge arrester terminals at rated discharge current running : according to the tables
Rated discharge current in the rated value of discharge current with a sinusoid 8/20us,which can be repeatedly led to the ground : according to the tables
Full discharge current imax the peak value of the discharge current with a sinusoid 8/20us,which the surge arrester can bear once : according to the tables constant operating current:up to 800 uA for 1p,2p,3p,up to 600 uA for 1p+N.3p+N
indication for damaged suege arrester
offered in types:1p,1p+N,3p,3p+N