Method for screening lightning arresters

The invention relates to the field of power equipment, and discloses a lightning arrester screening method, which comprises the following steps of: testing a first U1mA and a first leakage current of a lightning arrester Q to be tested; carrying out at least two times of large current impact tolerance tests on the lightning arrester to obtain a lightning arrester I, testing a second U1mA and a second leakage current of the lightning arrester I, and obtaining a first change rate delta 1 and a second change rate delta 2; the lightning arrester I meeting the first standard is subjected to a water immersion test, and a lightning arrester II is obtained; testing a third U1mA and a third leakage current of the lightning arrester II, and obtaining a third change rate delta 3 and a fourth change rate delta 4; performing a high-temperature aging test on the lightning arrester II meeting the second standard, and testing the power consumption and resistive current of the lightning arrester to obtain a lightning arrester