Test items and methods for lightning arresters with parallel resistors

Test instructions

Measure the insulation resistance of lightning arrester and base

Measuring the difference in non-linear factors

Measurement of power frequency discharge voltage

Discharge counter test

Test instructions:

The differences in testing items between FZ (PBC, LD), FCZ, and FCD types are common models;

1) Added measurement of conductivity current and inspection of non-linear coefficient difference of series combination components;

2) Limit the pressurization time for measuring power frequency discharge voltage.

Measure the insulation resistance of the lightning arrester and base;

Measurement purpose;

Measurement method;

Judgment method.

Measure the difference in nonlinear factor of series combination components for measuring conductivity current

Measurement purpose: To check whether the parallel resistance of the lightning arrester is damp, aged, broken, has poor contact, and whether the nonlinear coefficient is appropriate.

Measurement method: Conductivity current is the current that the lightning arrester passes through when a DC voltage is applied to both ends of the lightning arrester.

Test precautions

The measurement of high voltage should be carried out using shielded wires on the high voltage side. Each component should be tested.