The enterprise power distribution room is a location that needs to strengthen safety management. The following is a schematic diagram of the overall solution:

Wall mounted signboard for safety management in the attached distribution room

Safety equipment that should be equipped in the distribution room:

Safety warning signs, ground markings, fire alarm systems, fire extinguishers (usually CO2, dry powder is used at transformers), rat traps, insulation pads, insulation gloves, insulation boots, protective helmets, high and low voltage shaking meters, voltage detectors, insulation rods, etc. The latter few protective and safety equipment can generally be centrally configured in the duty room and carried or worn by operators to the distribution room for professional operations.

Safety Management System for Power Distribution Room

1. The distribution room should take measures to prevent lightning, rain, fire, and small animals, and pay attention to closing doors and windows at will. Regularly check the protection of the protective net and sealing strip.

2. The distribution room should be fully equipped with fire-fighting equipment and insulation tools, neatly arranged, regularly inspected, and kept in good condition; Management personnel are proficient in using fire-fighting equipment.

3. The operation of power distribution equipment should be strictly carried out by professionals in accordance with the operating procedures, and other personnel present should only supervise and not interfere; It is strictly prohibited for two people to operate simultaneously to avoid accidents.

Smoking is strictly prohibited in the distribution room, and it is strictly forbidden to bring flammable and explosive dangerous goods into the distribution room.

5. Maintenance personnel or other personnel who need to enter the power distribution room must obtain the consent of the management personnel before entering.

6. Management personnel should regularly inspect the operation of facilities and equipment, identify hidden dangers, arrange professional personnel to handle them in a timely manner, and ensure normal and safe power supply.

7. Management personnel should keep the floor, window sills, and equipment surfaces of the power distribution room clean and dust-free.

Safety Operation Regulations for Power Distribution Room

1. The management personnel of the power distribution room should adhere to the weekly system, and promptly arrange professional personnel to handle minor faults or hidden dangers that can be carried out while working. If there is a major malfunction or major hidden danger discovered, emergency measures should be taken, professional personnel should be mobilized, solutions should be formulated, and timely handling should be carried out.

2. When low-voltage equipment is working with electricity, a dedicated person should be assigned to supervise. Wear insulated gloves, insulated shoes, use tools with insulated handles, and stand on dry insulating materials during work. Adjacent live parts should be separated by insulating sheets. It is strictly prohibited to use files, metal rulers, and brushes or tools with metal objects.

3. Power outage tripping must be operated in the order of circuit breaker (or load switch, etc.), load side knife switch, and busbar side knife switch.

4. After a power outage of electrical equipment, before opening the circuit breaker and taking safety measures, it should be considered as powered and the equipment should not be touched to prevent sudden power outages.

5. During a power outage, it is necessary to cut off all power sources that may come into contact with each circuit. Transformers and voltage transformers must be disconnected from both high and low voltage sides, and the primary and secondary fuses of the voltage transformer must be removed. The operating power supply of the circuit breaker should be disconnected. The operating handle of the knife switch should be locked.

6. In case of personal electric shock or fire accidents, the on duty personnel should immediately disconnect the power supply of the relevant equipment for rescue.

7. When electrical equipment catches fire, carbon dioxide fire extinguishers or 1211 fire extinguishers should be used to extinguish the fire. When the transformer is on fire, only after all power is cut off can it be put out with a foam extinguisher.

Safety Operation Regulations for Distribution Duty Electricians

1. The on duty electrician must comply with the general regulations for electrician operations, be familiar with the performance and operation methods of various equipment in the power supply system and distribution room, and have the ability to take measures in abnormal situations.

2. Duty electricians are strictly prohibited from leaving their posts and must strictly comply with various regulations such as duty system, switching operation system, work operation system, shift handover system, safety equipment and fire equipment use management system, and access system.

3. The duty of the high-voltage transformer and distribution room must comply with the operating regulations of the high-voltage distribution equipment.

4. Regardless of whether the high-voltage equipment is live or not, the on duty personnel shall not move or cross the fence alone for work. If it is necessary to remove the fence, a guardian must be present and ensure that it is within a safe distance when the equipment is not powered off.

When outdoor high-voltage equipment is required during thunderstorm weather, insulated boots should be worn and lightning arresters and lightning rods should not be approached.

6. When entering and exiting the high-voltage room of the power distribution equipment, the door must be securely fastened at all times.

7. When carrying out power shutdown, transmission and switching operations with the power supply unit or user (dispatcher), the on duty person in charge must repeat the content and name to check for accuracy, and make records.

8. The operation of power outage and circuit breaker must be carried out in the order of vacuum switch (or load switch, etc.), load side circuit breaker, and busbar side circuit breaker. The order of power transmission and circuit breaker is the opposite. Strictly prevent pulling the brake with load.

The switching operation on high-voltage equipment and large capacity low-voltage main panel must be performed by two people, and supervised by one person who is more familiar with the equipment. Vacuum switches and knife switches (with interlocking devices with vacuum switches) for remote control or wall operation can be operated by a single person. The approval of the equipment power department * is required for the individual high-voltage equipment and personnel responsible for monitoring.

10. When using an insulating rod to pull and close a high-voltage knife switch or using a transmission mechanism to pull and close a high-voltage knife switch, protective goggles and insulated gloves should be worn. When operating outdoor high-voltage equipment on rainy days, the insulation rod should be covered with a rain cover and insulated boots should be worn while standing on the insulated platform. Switching operations are prohibited during lightning strikes.

When loading and unloading high-voltage fuses, protective goggles and insulated gloves should be worn. If necessary, insulated clamps should be used and standing on insulated pads or platforms.

12. After a power outage of electrical equipment, it should be considered as having electricity until the switch is turned off and safety measures are taken. Do not touch the equipment or enter the fence to prevent sudden power outages.

When power outage or partial power outage is required for construction and maintenance, the on duty personnel should take safety measures according to the requirements of the work order, including power outage, electricity inspection, installation of temporary grounding wire, locking of switches, installation of barriers and hanging warning signs. They should work together with the person in charge of the work to inspect and confirm that there is no electricity on site, and explain the location and precautions of nearby live equipment. Then, both parties should apply for a permit to start work before starting work.

At the end of the work, the staff should evacuate, and the person in charge of the work should explain clearly to the on duty personnel and conduct a joint inspection. Both parties should apply for a work termination visa before the on duty personnel can remove the safety measures and restore power supply. Temporary shutdown and power supply are strictly prohibited. Before completing the work termination procedures, the on duty personnel are not allowed to close and power on the construction equipment.

15. When high-voltage equipment is powered off, equipment that is less than the safe distance specified in Table 133 (see "Installation Electricians for Internal Lines") from the normal range of activities of the workers must be powered off. Equipment that is farther than Table 133 but less than the safe distance specified in Table 131 must be equipped with a sturdy temporary fence at a distance not less than Table 133 from the live parts, otherwise the power must be turned off. If the live parts are behind or on both sides of the workers without reliable measures, the power must also be cut off.

16. During a power outage, it is necessary to cut off the power sources that may come into contact with each circuit. It is not enough to simply open the circuit breaker and start working. Instead, the isolation switch must be opened, the grounding switch must be closed, and a sign that reads "If someone is working, do not close" must be hung to ensure that each circuit has at least one obvious disconnection point. Transformers and voltage transformers must be disconnected from both high and low voltage sides. The primary and secondary fuses of the voltage transformer must be removed. The operating power supply of the circuit breaker should be disconnected. The operating handle of the knife switch should be locked

Stay here.

17. The voltage tester must be a qualified product and must be compatible with the voltage level. It should be tested separately on both sides of the incoming and outgoing lines of the maintenance equipment. Before conducting an electrical test, it is necessary to conduct a test on the energized equipment to prove that the tester is in good condition. Insulated gloves must be worn when using high-voltage equipment for electrical testing.

18. When it is confirmed that the equipment has no voltage, the maintenance equipment should be immediately grounded with a conductor and short circuited to each other. Grounding wires should be installed for all circuits or parts that may generate induced voltage and potentially deliver power to the power outage equipment. The grounding wire should be made of multiple strands of bare soft copper wire, with a cross-sectional area of not less than 25 square millimeters. The grounding wire must be fixed on the conductor with a wire clamp, and it is strictly prohibited to use winding methods for grounding and short circuiting. When installing grounding wires, the grounding terminal must be connected first, followed by the conductor terminal. The order of removal is the opposite. Insulation rods and gloves should be used when installing and removing grounding wires. The installation and dismantling work must be carried out by two people. Maintenance personnel are not allowed to install, dismantle or change the grounding wire on their own. The grounding wire should be numbered and placed at a fixed location. The installation and removal of grounding wires should be recorded and clearly explained during the shift handover.

When working on the capacitor bank circuit, each capacitor must be discharged to ground one by one.

20. Warning signs reading "Do not close, someone is working" should be hung on the operating handles of circuit breakers and knife switches that can be powered to the workplace once they are closed. Warning signs reading 'Stop, High Voltage Danger' should be hung on the live equipment barriers on both sides and opposite sides of the workplace, as well as on the prohibited passages. The workplace should display a warning sign that reads' Work here '.

21. When inspecting near low-voltage live equipment, a safe distance must be maintained and a dedicated person must be assigned to supervise. Live equipment should only be placed in front of or on one side of the staff, otherwise power should be cut off.

When working on the secondary circuit of a live current transformer, it is necessary to strictly prevent high voltage caused by an open circuit on the secondary side of the current transformer. When disconnecting the current circuit, a short circuit piece or short wire must be used to short-circuit the terminal on the secondary side of the current transformer. It is strictly prohibited to wrap wires. Do not disconnect the grounding point of the circuit during work. There must be a dedicated person to supervise during work, insulated tools should be used, and standing on insulation pads.

When a personal electric shock accident or fire accident occurs, the on duty personnel shall immediately disconnect the power supply of the relevant equipment according to the operating procedures without permission, in order to facilitate rescue. However, they must immediately report to their superiors and keep records afterwards.

When electrical equipment catches fire, carbon dioxide fire extinguishers or 1211 fire extinguishers should be used to extinguish the fire. When the transformer is on fire, it can only be put out with a foam extinguisher after all the surrounding power is cut off. Grid barriers should be installed at the entrances of doors, windows, and cable trenches in the distribution room to prevent small animals from entering.