substation? The following checks and tests shall be carried out on the high and low voltage electrical devices before power transmission in

substation.

(1) Do withstand voltage test for electrical devices and insulating oil of high and low voltage power fittings.

(2) Measure the insulation resistance of each component and check whether the phase is correct.

(3) Check whether the contact is fixed reliably, whether the contact is tight, and whether the contact surface is sufficient; whether the on and off actions of various switchgear are correct.

(4) Whether the melt in the fuse meets the design requirements.

(5) Whether the relay protection device operates normally and the interlocking device is effective.

(6) Whether the grounding device is qualified.

(7) Whether the display of the signal and indicating device is correct, and whether the DC system is reliable.

(8) Whether the power fittings and fire fighting equipment are complete.

What are the basic requirements of the lightning arrester for electric hardware?

When it is struck by direct lightning, it can quickly lead the lightning current into the ground to ensure that the lightning current can be safely dispersed during discharge.