What are the good methods and ingenious measuring methods for varistors to measure their good or bad?
Varistor general in the circuit in parallel with the voltage across the resistor, when the change exceeds the rated value, resistance decreases rapidly, showing the short circuit state, the current series fuse circuit, play a protective role.
First you must know the varistor voltage value, with an appropriate voltage source in series with a resistor voltage applied to the protection of the varistor varistor, voltage measurement value, whether in nominal value, if it is, that element is good. If the deviation from the nominal value is great, then there is a problem with this varistor.
Varistors are commonly used in circuits for overvoltage protection and voltage regulation. A varistor three parameter tester is used to measure the voltage of the varistor and the leakage current. In the case of part-time job, when measuring the multimeter 10K file, to probe connected to the resistor multimeter should show marked varistor on resistance, if the deviation from this value, the varistor has been damaged. Refer to refer to
