Surge arresters, surge arresters, voltage suppressor ARF.

Surge arresters, surge arresters, voltage limiter ARF.

Surge arresters-150, ARF-110, ARF-35, ARF-10, ARF-6, ARF-0,38, ARF-0,22.

Limiter overvoltage nonlinear (ARF) is an element of protection without the spark gaps. The active part of the arrester consists of a doped metal, when voltage is applied it behaves as a set of series-connected varistors . The principle action surge arrester based on the fact that the conductivity of the varistor is nonlinearly dependent on the applied voltage. In the absence of overvoltage does not pass current, but as soon as the network segment overvoltage occurs, the resistance of the arrester sharply reduced, and this is caused by the effect of surge protection . After upon expiration of the overvoltage on the conclusions of the ARF, its resistance again increases. The transition from "closed" to "open" the state is the unit nanoseconds (unlike arresters with spark gaps, which is the response time can reach several microseconds). In addition to high speed actuation of the surge arrester has a number of advantages. One of them is the stability characteristics of the varistors after repeated triggering of a down before the end of the specified time of operation, which, among other things, eliminates the need for maintenance.

Conditional designation surge arresters surge arresters-150, ARF-110, ARF-35, ARF-10, ARF-6, ARF-0,38, ARF-0,22 :

Surge arrester - surge suppressor nonlinear;
p is the letter designating the material of the tires ( polymer );
0,22; 0,38; 6; 10; 35; 110; 150 - class line voltage in kilovolts;
7,2; 12; - maximum allowable continuous working voltage in kilovolts;
10 - nominal discharge current in kA;
1 - the class of the discharge line;
IV - pollution level according GOST 9920;
NF1 - climatic version and location category according to GOST 15150.