QUESTION:

How is the procedure to do an acceptance test for a surge suppressor (varistor)?

ANSWER:

The procedure for the acceptance test of a varistor as surge suppressor for solenoid coils can only do with an oscilloscope. At this is to do a measurement on the solenoid coil one time with and on time without connected varistor. A comparison of both measurements show the functional efficiency of the varistors.