1. Buildings
(1) The structure of the substation building shall meet the requirements of fire prevention and earthquake resistance, and the substation and distribution equipment shall be installed in separate rooms. The doors shall open outward and be fire-resistant, and the doors in the middle passage shall be free-swinging doors.
(2) No holes shall be left in the walls, floors, cable trenches, doors and windows of the substation to prevent small animals from entering. In addition to meeting the ventilation requirements, the ventilation openings of transformer rooms and capacitor rooms must be equipped with rainproof covers.
(3) Substations shall not be adjacent to places containing flammable, explosive, corrosive materials or gases or conductive dust.
(4) The building of the substation shall not leak or seep water. The cable inlet must be sealed with flame-retardant material.
2. Power distribution equipment
(1) Transformer When the transformer is installed indoors, its center should be in the best position for air convection. The side of the transformer that needs to be frequently observed, such as the oil level gauge, temperature gauge and gas relay, should face outwards, and the transformer and iron fence should be reliably grounded.
(2) Disconnect switches, whether mounted on walls or metal frames, must be installed securely and reliably. When disconnected, the distance between the moving and stationary contacts must not be less than 160mm to reliably isolate voltage. When the switch requires an extended shaft, a bearing support must be installed at the shaft end. The operating mechanism must have a corresponding interlocking mechanism, and the metal parts must be reliably grounded.
(3) When the load switch is opened, the distance between the blade and the stationary contact of the FN-10 type should not be less than 182mm and the arc tube should be intact and undamaged, and the quick opening and closing device should operate reliably.