Replacement module for SPD T1+T2 EKF OV12-module

Replacement module for SPD T1+T2 EKF PROxima is intended for replacing a failed varistor module of the SPD T1+T2. The replacement module is a varistor whose resistance changes depending on the applied voltage: in a normal state, the current through the varistor is extremely small and the resistance is high, but when an overvoltage occurs, the resistance of the varistor instantly decreases by several orders of magnitude, accordingly, the current increases and the impulse overvoltage is discharged.