Firstly, maintenance of electrical equipment is an urgent need for the equipment itself. Long-term exposure to the air leads to the accumulation of moisture and dust, which can reduce equipment efficiency, as well as cause parts to loosen in the heat and cold alternation. Additionally, equipment aging issues will also affect the safety of system operation.

Secondly, the power regulations explicitly require regular maintenance of equipment. The relevant requirements in the power supply regulations, Q/CSG 1 0007-2004 "Regulations for Preventive Testing of Power Equipment," specify the requirements for preventive testing of various power equipment, to determine if the equipment meets operating conditions, prevent equipment damage, and ensure safe operation.