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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.