What are the grounding problems of the whole substation?

(1) When laying out the grounding wires in the cable trenches for electrical cables, the number of cable trenches actually completed was not checked, resulting in a small number of grounding trenches.

(2) Because the construction unit did not follow the design requirements of the grounding wires of the row of structures, the actual grounding points of the structure were far more than the design requirements, resulting in fewer grounding wires of the structure.

(3) There is an omission in the grounding of the structure support and the equipment body, and the grounding point has no grounding mark.

(4) The secondary circuit grounding of CT and CVT is not standardized, and there are multiple grounding phenomena.

(5) Both ends of the cable shielding layer are reliably grounded.

(6) The grounding wire of the outdoor lighting fixtures of the whole station is not listed.

(7) In order to meet the requirements of countermeasures, in addition to the power supply box and the maintenance power supply box, the other terminal boxes related to the protection are required to install a grounding copper bar with a cross-sectional area of not less than 16mm, and the grounding copper bar is in the box. To do insulation treatment, use support insulators to install and fix.

(8) The equipment grounding wire welding does not meet the specifications, and the solder joints are not treated with corrosion protection.