Installation and operation requirements for various box-type substations

(1) The floor placed in the box-type substation should be selected at a higher level and should not be placed at a low level to prevent rainwater from being poured into the box to affect the operation of the equipment. When casting the concrete platform, there should be a gap on the high and low pressure sides to facilitate the laying of the cable in and out of the cable. When excavating the foundation, in case of the ground formed by garbage or mulch, it is necessary to dig the solid soil, and then backfill the better soil and compact it, then fill the triple soil or the road slag to ensure the foundation is stable.

(2) The grounding and neutral lines of the box substation share a grounding grid. The grounding grid is generally grounded at the base four corners and then integrated into one. The box substation and the grounding grid must have two reliable connections. After the operation of the box-type substation, the grounding connection should be checked frequently because it is not loose or rust-free. Ground resistance should be measured periodically and the grounding resistance should be no more than 4Ω.

(3) Box-type substation is mainly cooled by natural wind circulation. Therefore, it is not possible to violate the piles around, especially the transformer room door should not be blocked, and the attachments on the louver vents should be removed frequently to ensure that all electrical equipment does not exceed the maximum allowable temperature.

(4) After the low-voltage circuit breaker trips, the cause of the trip should be checked before the test can be sent. If the delivery is unsuccessful, the cause of the failure must be thoroughly searched. After the exclusion, the power can be sent to prevent the accident from expanding.

(5) The zinc oxide arrester shall be installed in the high-voltage power distribution room of the box-type transformer. The installation method must be convenient for testing, disassembly and replacement.

(6) Ring network switches, transformers, lightning arresters and other equipment in high-voltage power distribution equipment should be regularly inspected and maintained, and defects should be repaired in time, and insulation preventive tests should be conducted regularly. The box-type substation will be deactivated for more than 3 months and should be fully pre-tested before being put into operation.

(7) To replace the high-voltage fuse without breaking capability, the transformer must be powered off, the mechanical interlock should be properly removed during operation, and the insulated operating rod should be used.

(8) All the inlet and outlet cable holes of the box-type substation should be blocked to prevent small animals from entering the accident.

(9) Warning signs and electrical equipment nameplate numbers must be available for high voltage hazard.