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Safety Procedures for the Switchgear Room 1. The electricians on duty must possess the necessary electrical knowledge, be familiar with safety operating procedures, and understand the performance and operation methods of various devices in the power supply system and the switchgear room. And it has the ability to take measures in abnormal situations. 2. The on-duty electrician must possess a high level of sense of responsibility, and strictly adhere to various regulations such as the on-duty inspection system, switch operation procedures, work order systems, management protocols for safety equipment and fire-fighting devices, as well as access control rules. 3. Personnel permitted to conduct independent inspections of high-voltage equipment and serve as supervisors must be approved by the leader of the power department. 4. Regardless of whether the high-voltage equipment is energized or not, the duty personnel must not remove the barriers alone or step over them to carry out work directly. If it is necessary to move the control panel, a supervisor must be present, and the safety distance required when the equipment is not powered off must be maintained. 5. When it is necessary to inspect outdoor high-voltage equipment during thunderstorm weather, green-edged shoes should be worn, and one must not approach lightning arresters and lightning rods. 6. When inspecting the distribution equipment or entering and leaving the high-voltage room, be sure to lock the door immediately. 7. When contacting the power supply company or the user (the dispatcher) to carry out power outage or restoration operations, the person in charge on duty must verify everything to ensure accuracy, and record the details of the communication as well as the name of the contact person. 8. Power disconnection must be carried out in accordance with the oil switch (or load switch, etc.). Operate the load-side circuit breaker and the busbar-side circuit breaker in sequence. 9. Switching operations on high-voltage equipment and large-capacity low-voltage main panels must be carried out by two persons, with the one who is more familiar with the equipment serving as the supervisor. Oil switches and disconnectors that can be operated remotely or from behind a partition (with interlocking devices connected to the oil switches) can be operated by a single person. 10. Insulated gloves must be worn when operating high-voltage circuit breakers manually or through a transmission mechanism, as well as when operating high-voltage circuit breakers and oil switches. When operating outdoor high-voltage equipment in rainy weather, insulating boots should be worn. Switching operations are prohibited during thunderstorms. 11. When installing or removing fuses while they are still energized, protective glasses and insulating gloves must be worn; insulating pliers should be used if necessary, and one should stand on an insulating mat. 12. After the power is cut off to electrical equipment, it should be treated as if it is still energized until the circuit breaker is disconnected and appropriate safety measures are taken; do not touch the equipment or enter the enclosure to prevent sudden power restoration. 13. When power outage is required for construction or maintenance work, the duty personnel shall take the necessary safety measures as specified in the work order, including shutting off the power, checking for electricity presence, setting up barriers, and hanging warning signs. They shall jointly inspect the site with the person in charge of the work to confirm that there is no electricity present, and inform them of the locations of nearby live equipment as well as any precautions to be taken. Only after both parties have issued the permission to start work can the work begin. 14. At the end of the work, the staff members leave the site. The person in charge of the work explains everything to the duty officer, and together they conduct a check. Only after both parties have signed the work completion form can the duty officer remove the safety measures and restore power supply. Before completing the work completion procedures, the duty personnel are not allowed to turn on the power to the construction equipment. 15. When high-voltage equipment is shut down for maintenance, the power must be cut off if the distance to the area where workers carry out their normal activities is less than 0.35 meters. For equipment with a distance greater than 0.35 meters but less than 0.7 meters, a sturdy temporary barrier must be installed at a distance of not less than 0.35 meters from the live parts; otherwise, the power supply must be shut off. The power supply must also be cut off if there are no reliable measures to protect the live parts behind or on either side of the workers. 16. In the event of a power outage, the power sources from which electricity may supply the various circuits must be cut off. It is not sufficient to simply turn off the oil switch to carry out work; the circuit breaker must also be turned off to ensure that there is at least one clear break point in each circuit. The transformer and voltage transformer must be disconnected from both the high-voltage and low-voltage sides. The primary and secondary fuses of the voltage transformer must be removed. The operating power supply of the oil switch must be disconnected. The operating handle of the knife switch must be locked. 17. When testing for voltage, a voltage tester of the appropriate rating and in good condition must be used, and voltage testing should be conducted on both sides of the outlet when servicing equipment. Before testing for electricity, it is necessary to first test it on a live device to confirm that the voltage tester is in good condition. Insulated gloves must be worn when testing high-voltage equipment for electricity. 18. Once it is confirmed that the equipment has no voltage, the conductors of the equipment under maintenance should be grounded immediately and shorted to each other. Grounding wires must be installed at all locations where power may be supplied to the equipment that is out of service, as well as in those areas where induced voltage may occur. The grounding wire should be made of multi-strand bare soft copper wire, with a cross-sectional area of not less than 25 square millimeters. The ground wire must be fixed to the conductor using special clamps, and the removal process is reversed. Insulated gloves should be used when installing and removing grounding wires. The installation and removal work must be carried out by two people. Maintenance personnel are not allowed to install, remove, or modify the grounding wire on their own. The grounding wires should be numbered and placed in a fixed location. Records should be kept for the installation and removal of grounding wires, and these details must be clearly communicated during shift handovers. 19. When working on the capacitor circuit, the capacitors must be discharged one by one. Ground after discharge. 20. On switches and disconnectors that can be energized as soon as they are closed, signs reading “Do not close – persons at work” should be hung on their operation handles. Signs reading “Stop, High Voltage Hazard” are hung on the barriers surrounding the live electrical equipment on both sides and opposite the work area, as well as on the passages where access is prohibited. 21. When a power outage is required for the maintenance of lines or users, the duty personnel shall take safety measures, then notify the relevant person in charge to start the work and make a record of it. Power supply can only be restored after receiving notification from the original supervisor once the work is completed. Scheduled power outages and restorations are strictly prohibited. 22. When working near live equipment, a dedicated supervisor must be assigned. Live equipment can only be handled in front of or to the side of the workers; otherwise, the power must be turned off. 23. When performing maintenance on the low-voltage circuit during a power outage, the power supply must be disconnected and the fuse removed. Hang a sign that reads “Do not close – work in progress” on the switch operating handle. 24. When low-voltage equipment is in operation under voltage, a dedicated person should be assigned to supervise it. At work, one must wear a work hat, long-sleeved clothing, insulating gloves, use tools with insulated handles, and work on dry insulating surfaces. Adjacent live parts should be separated by insulating sheet material. The use of files, metal rulers, brushes with metal parts, and dusting brushes is strictly prohibited. 25. When working on the secondary circuit of a live current transformer, it is essential to prevent high voltages from being generated due to an open circuit on the secondary side of the current transformer. When breaking the current circuit, a short circuit must be created using a shorting wire at the dedicated terminals on the secondary side of the current transformer. Wrapping with wires is strictly prohibited. The permanent ground connection of the circuit must not be disconnected during operation. There must be a dedicated person to supervise the work, insulated tools must be used, and one must stand on an insulating mat. 26. In the event of electric shock or fire accidents, the duty personnel should immediately cut off the power supply to the relevant equipment without waiting for instructions, in order to carry out rescue efforts. 27. In the event of a fire involving electrical equipment, carbon tetrachloride, carbon dioxide fire extinguishers, or 1211 fire extinguishers should be used to put out the fire.