How many mm is the grounding flat steel laid on the wall around substation and electrical shaft from the wall?

Generally, it is 50mm, which shall be subject to leaving the wall but not affecting the passage and pipe taking.

The transformer room is also called the transformer room. In the national standard, the definition of power distribution room is: "Only high-voltage power distribution device can switch on and off and distribute electric energy, and there is no main transformer on the bus". The difference between a distribution station and a substation is that there are no transformers in the distribution room (distribution station), but there are all transformers in the substation. The power distribution room is a key part of the building's power supply system, and a full-time electrician is set up to run 24 hours a day. Without the permission of the management office manager and department head, non-staff members are not allowed to enter. The personnel on duty must hold relevant certificates and be familiar with the status, operation methods and safety precautions of power distribution equipment. The personnel on duty must pay close attention to the instructions of voltmeter, ammeter and power factor meter; Do not overload the air switch. Always keep the ground and equipment appearance of the distribution room clean. Switching operation of transformer room equipment shall be carried out by the personnel on duty alone, and other personnel present only serve as guardians and shall not interfere; It is forbidden for two people to switch the brake at the same time to avoid mistakes.

1. Power transmission: (The power supply of the building is interrupted and needs to be restored quickly)

① Find out whether the fault is an external transmission line or an internal distribution line. External fault: the transformer does not work (no noise, no display on the display screen); Internal fault: the transformer works normally (there is noise, the display screen shows the temperature, and the fan operation indicator is on).

(2) When the external line is out of power, contact the power supply department and wait for power transmission to resume.

(3) When the internal line fails, quickly find out the cause of the failure and immediately eliminate it before sending.

④ Power transmission step: cut off all load switches (especially the lighting part); Press the green start button of 1# cabinet and 5# cabinet, and the voltmeter indicates normal (400 V); Turn off each load switch one by one.

⑤ If the transformer is working (with noise and temperature display) and the fan indicator light is not on, it means that the external transmission line has stopped supplying power, and then the power supply will be resumed immediately. At this time, just start the cooling fan, and then power on according to the power-on steps.

2. Power failure: (Power failure is necessary for equipment maintenance or other reasons)

① Power failure in equipment maintenance: disconnect the corresponding circuit breaker and take necessary safety operation measures (mainly: grounding protection of equipment power cord and shell, hanging warning signs of "No one is allowed to switch on", and doing insulation protection for maintenance personnel, etc. ) before equipment maintenance.

(2) If complete power failure is required, all circuit breakers must be disconnected one by one, and then press the red buttons of 1# cabinet and 5# cabinet.

(3) Cutting off the high-voltage power supply must be carried out in accordance with the operating instructions of the high-voltage ring network switchgear.

I hope I can help you solve your doubts.