Give you a copy of "Regulations on Electric Safety Work" for your reference!
People's Republic of China (PRC) industry standard
Code of Practice for Safety of Electrical Industry
DL 408—9 1
(Electrical parts of power plants and substations)
The Ministry of Energy approved the implementation of1991-3-18+0-09-01.
1 general rules
1. 1 In order to ensure the safety and health of workers in production and the safe operation of power system and power generation and distribution equipment, this regulation is formulated in combination with years of practical experience in power production.
Leading cadres and electrical workers of all units must strictly implement this regulation.
Everyone is responsible for production safety. Leaders at all levels must set an example, fully mobilize the masses and rely on them; Give play to the role of safety supervision institutions and mass safety organizations, and strictly supervise the implementation of this regulation.
1.3 this procedure is applicable to all personnel (including infrastructure installers) engaged in power generation, substation, transmission, distribution, rural power and consumer electrical equipment.
Each unit may formulate supplementary provisions according to the site conditions, which shall be implemented after being approved by the leader (chief engineer) in charge of production of the factory (bureau).
The so-called electrical equipment in use refers to all or part of the electrical equipment with voltage and once it is operated, it will have voltage.
1.4 electrical equipment is divided into high voltage and low voltage:
High voltage: the voltage of the equipment to the ground is above 250V;
Low voltage: the voltage of the equipment to the ground is lower than 250 volts.
1.5 electrical workers must meet the following conditions:
1.5. 1 According to the doctor's identification, there is no disease that interferes with work (physical examination is about once every two years).
1.5.2 Have the necessary electrical knowledge, be familiar with the relevant parts of the Electrical Safety Work Regulations (electrical parts, power lines, thermal and mechanical parts of power plants and substations) according to the post and work nature, and pass the examination.
1.5.3 Learn emergency rescue methods (Appendix G), especially electric shock first aid.
1.6 electrical personnel should take the exam of this regulation once a year. If the electrical work is interrupted for more than three months for any reason, it is necessary to review this regulation again and return to work only after passing the examination.
Personnel who take part in live-line operation shall receive special training, pass the examination and be approved by the leaders before taking part in the work.
New electrician, intern, temporary worker (cadre, temporary worker, etc.). ) You must go through safety knowledge education before you can go to the site to participate in the designated work, but you are not allowed to work alone.
Before work, the electrical staff supported by other units should introduce the wiring situation of on-site electrical equipment and related safety measures.
1.7 any staff member who finds any violation of this regulation that is enough to endanger personal and equipment safety shall immediately stop it.
1.8 Those who earnestly abide by this regulation will be commended and rewarded. Those who violate this regulation should be carefully analyzed, strengthened education and dealt with severely according to the situation. Those who cause major accidents shall be given administrative or criminal sanctions according to the seriousness of the case.
1.9 the safety devices mentioned in this regulation must meet the requirements of annexes e and f. ..
2 Basic requirements for the work of high-voltage equipment
2. 1 Power plant and substation are on duty.
2. 1. 1 The personnel on duty must be familiar with electrical equipment. The person on duty alone or the person in charge on duty should also have practical work experience.
Table 1 Safety distance of equipment without power failure
Safe distance (m) of voltage grade (kV)
10 and below (13.8)
20~35
Forty-four
60~ 1 10
154
220
330
500 0.70
1.00
1.20
1.50
2.00
3.00
4.00
5.00
2. 1.2 If the high-voltage equipment meets the following conditions, it can be on duty by one person:
A. The isolation room of indoor high-voltage equipment shall be provided with a barrier, the height of which shall be above 1.7m, which shall be firmly installed and locked;
B the operating mechanism of indoor high-voltage switch is isolated from the switch by a wall or a metal plate, or equipped with a remote control operating mechanism.
A single person on duty shall not engage in repair work alone.
2. 1.3 No matter whether the high-voltage equipment is charged or not, the personnel on duty shall not move or work across obstacles alone; If obstacles must be removed, a guardian must be present, and the safety distance shall conform to Table 1.
2.2 Inspection of High-voltage Equipment
2.2. 1 The on-duty personnel and off-duty personnel who are allowed to patrol high-voltage equipment alone with the approval of enterprise leaders are not allowed to do other work or move or cross obstacles when patrolling high-voltage equipment.
2.2.2 In thunderstorm weather, when it is necessary to patrol outdoor high-voltage equipment, insulating boots should be worn, and lightning arresters and lightning rods are not allowed.
2.2.3 When the high-voltage equipment is grounded, it shall not be close to the fault point within 4m indoors and 8m outdoors. Personnel entering the above range must wear insulating boots and gloves when touching the shell and structure of the equipment.
2.2.4 Patrol the power distribution equipment, and lock the door when entering and leaving the high-pressure room.
2.2.5 There should be at least three keys to the high-pressure room, which shall be kept by the power distribution personnel on duty and handed over according to the value. One copy is for emergency use, the other is for the personnel on duty, and the others can be lent to the personnel and work leaders who are allowed to inspect the high-voltage equipment independently, but they must be registered and signed and returned on the same day.
2.3 pour brake operation
2.3. 1 switching operation must be carried out according to the orders of the on-duty dispatcher or the person in charge on duty, and it is repeated correctly. Commands should be issued accurately and clearly, using normal operating terms and dual names of equipment, namely equipment name and number. The sender should exchange names with the recipient before giving an order by telephone. The dispatcher on duty should record the whole process of issuing orders (including repeated orders from the other party) and listen to the report of orders. The switching operation shall be completed by the operator (see Appendix A). When a single person is on duty, the operator shall communicate the operation ticket to the attendant by telephone, and the attendant shall fill in the operation ticket according to the communication and repeat it correctly, and fill in the operator's name at the signature of the "guardian".
Each operation ticket can only fill in one operation task.
2.3.2 Power failure and closing operations must be carried out in the order of circuit breaker (switch)-load side isolating switch (circuit breaker)-bus side isolating switch (circuit breaker), and power failure and closing operations should be carried out in the reverse order. Strictly prevent the circuit breaker from closing with load.
In order to prevent misoperation, high-voltage electrical equipment should be equipped with locking devices to prevent misoperation (in a few special cases, mechanical locks can be installed with the approval of higher authorities). Unlocking devices (including keys) of locking devices shall be properly kept and used according to regulations, and shall not be misused. A mechanical lock needs a key to open a lock, and the key should be numbered and properly kept for easy use. All locking devices (including mechanical locks) put into operation shall not be withdrawn or unlocked without the consent of the on-duty dispatcher or shift supervisor.
2.3.3 The following contents shall be filled in the operation ticket:
Close the circuit breaker (switch) and isolating switch (circuit breaker), check the position of the circuit breaker (switch) and isolating switch (circuit breaker), check whether the grounding wire is removed, check the load distribution, remove the grounding wire, install or remove the fuse (safety) of the control circuit or voltage transformer circuit, switch the protection circuit, and check whether there is voltage, etc.
The operation ticket should fill in the dual name of the equipment, that is, the equipment name and number.
2.3.4 The operation ticket shall be filled in with pen or ballpoint pen, and the ticket face shall be clear and tidy, and shall not be altered at will. The operator and guardian shall check the filled-in operation items according to the simulation panel or wiring diagram, and sign them respectively, and then the person in charge on duty shall sign them. Particularly important and complicated operations should also be reviewed and signed by the shift supervisor.
2.3.5 Before starting the operation, check the simulation preview on the simulation board before operating the equipment. Check the name, number and location of the equipment before operation, and seriously implement the monitoring repetition system during operation. Issuing operation orders and repeating operation orders should be serious, loud and clear. Operations must be carried out item by item in the order in which the operation tickets are filled in. After each operation, mark it with "√" after checking that it is correct, and recheck it after all operations are completed.
2.3.6 Switching operation must be carried out by two people, one of whom is familiar with the equipment as a guardian. Switching operation of substation with one person on duty can be completed by one person.
Particularly important and complicated switching operation should be operated by skilled personnel on duty and supervised by the person in charge on duty or the shift supervisor.
2.3.7 If in doubt during operation, stop the operation immediately and report to the dispatcher or the person in charge on duty, and then operate after finding out the problem. Don't change the operation ticket without authorization, and don't dismantle the locking device at will.
2.3.8 Insulating gloves should be worn when closing the isolating switch (circuit breaker) with insulating rod or closing the isolating switch (circuit breaker) and circuit breaker (switch) with transmission mechanism. When operating outdoor high-voltage equipment in rainy days, the insulating rod should have a rain cover and insulating boots. If the grounding grid resistance does not meet the requirements, wear insulating boots on sunny days. When lightning strikes, it is forbidden to pull the switch.
2.3.9 When loading and unloading high-voltage fuses (insurance), goggles and insulating gloves should be worn, insulating pliers should be used when necessary, and stand on insulating pads or insulating platforms.
2.3. The interrupting capacity of10 circuit breaker (switch) shall meet the requirements of power grid. When the breaking capacity is insufficient, the operating mechanism must be separated from the circuit breaker (switch) by a wall or a metal plate, and a remote control should be set, and the reclosing device must be stopped.
2.3. 1 1 After the power failure of the electrical equipment, even if it is an accidental power failure, the equipment shall not be touched or enter an obstacle before the relevant disconnector (circuit breaker) is turned off and safety measures are taken to prevent sudden call.
2.3. 12 In case of personal electric shock accident, in order to rescue the electric shock victim, the power supply of related equipment can be disconnected without authorization, but it must be reported to the superior immediately afterwards.
2.3. 13 No operation ticket is required for the following work:
A. accident handling;
B. Single operation of closing the circuit breaker (switch);
C. Open the grounding breaker or dismantle the only set of grounding wires in the whole plant (institute).
The above operations should be recorded in the operation record book.
2.3. 14 operation tickets should be numbered first, and used in the numbered order. Invalid operation tickets should be marked with the words "invalid", and those that have been operated should be marked with the words "executed". The above operation tickets shall be kept for three months.
2.4 Classification of work safety measures for high-voltage equipment
2.4. 1 working on high-voltage equipment in use can be divided into three categories:
2.4. 1. 1 All power outages refer to all indoor high-voltage equipment power outages (including overhead lines and cable inlets), all doors leading to adjacent high-voltage rooms are locked, and all outdoor high-voltage equipment power outages (including overhead lines and cable inlets).
2.4. 1.2 local power failure refers to local power failure of high-voltage equipment or indoor power failure, but all doors leading to adjacent high-voltage rooms are not locked.
2.4. 1.3 Work without power failure refers to:
A. The work itself does not need power failure, and there is no danger of accidentally touching conductive parts;
B it is allowed to work on the shell or conductive part of live equipment.
2.4.2 When working on high-voltage equipment, the following items must be observed:
A. fill in the working ticket or oral or telephone order;
B. At least two people should work together;
C. Complete organizational and technical measures to ensure the safety of staff.
3 organizational measures to ensure safety
3. 1 organizational measures for electrical equipment operation to ensure safety.
A. working ticket system;
B. Work permit system;
C. Work guardianship system;
D. system of work interruption, transfer and termination.
3.2 Working ticket system
3.2. 1 When working on electrical equipment, you should fill in the working ticket or execute the working ticket according to the order. There are three ways:
A. fill in the first working ticket (see appendix b);
B. Fill in the second working ticket (see Appendix C);
C. oral or telephone orders.
3.2.2 The work of filling in the first working ticket is as follows:
A. The work on high-voltage equipment needs to be completely or partially blacked out;
B when working on the secondary wiring and lighting circuit in the high-voltage room, the power supply of the high-voltage equipment must be cut off or safety measures must be taken.
3.2.3 The work of filling in the second working ticket is as follows:
A. Live working and working on the shell of live equipment;
B. Work on the control panel, low-voltage switchboard, distribution box and power supply trunk line;
C. It is not necessary to turn off the high-voltage equipment when working on the secondary wiring circuit;
D. Working on the excitation circuit of rotating generator, synchronous camera or rotor resistance circuit of high-voltage motor;
E. Non-on-duty personnel shall phase with insulating rods and voltage transformers or measure the high-voltage circuit current with clamp ammeter.
3.2.4 Other work shall be ordered orally or by telephone.
Oral or telephone orders must be clear and correct, and the personnel on duty should record the sender, person in charge and work tasks in detail in the operation record book, and repeat them to the sender for verification.
3.2.5 The working ticket shall be filled in duplicate with a pen or ballpoint pen, which is correct and clear, and shall not be altered arbitrarily. If there are individual mistakes or missing words that need to be corrected, the handwriting should be clear.
One of the two working tickets must always be placed in the workplace, and the person in charge of the work shall be responsible for it, and the other one shall be handed over according to the value. The personnel on duty shall record the working ticket number, work task, allowable working time and completion time in the operation record book.
When working on unattended equipment, the second work permit shall be collected by the work permit holder.
3.2.6 A person in charge of work can only issue one working ticket. The working place listed on the working ticket is limited to one electrical connection part.
If the construction equipment belongs to the same voltage and is located on the same floor, and the power transmission is stopped at the same time, and the live conductor is not touched, it is allowed to use a working ticket in several electrical connection parts.
All safety measures in the working ticket before construction shall be completed at one time.
Construction workers, painters and other non-electrical personnel shall issue working tickets to guardians when they are working.
3.2.7 A second working ticket can be issued for the same type of work under the condition that several electrical connection parts are not powered off in turn.
3.2.8 If a certain electrical connection part or power distribution device is completely out of power, a working ticket can be issued for all work in different locations, but the main work contents should be filled in in detail. When several classes are working at the same time, the working ticket can be sent to a general person in charge, and only the person in charge of each class is filled in the column of working class members, and there is no need to fill in the list of all personnel.
If part of the work is not completed according to the planned time, and it is still necessary to continue the work without hindering the power transmission, a new working ticket should be applied according to the charged situation of the field equipment after the power transmission before the power transmission, and the work can be continued only after the safety measures are arranged.
3.2.9 Emergency maintenance work can be done without working ticket, but it should be recorded in the operation record book. Before starting work, safety measures must be taken according to the provisions of Chapter IV of this Regulation, and a special person shall be appointed.
3.2. When the10 line, user maintenance class or infrastructure construction unit works in a power plant or substation, it must be issued a working ticket by its unit (power plant, substation or work area) and perform the work permit procedures.
3.2. 1 1 The first working ticket should be handed over to the personnel on duty the day before work. Temporary work can be directly handed over to the attendant before the work begins.
The second working ticket should be given to the personnel on duty in advance on the working day.
3.2. 12 if the substation is far away from the work area or cannot deliver a new working ticket the day before work for some reason, the working ticket issuer can send the full text of the working ticket to the substation attendant by telephone according to the working ticket he has filled in, and the communication must be clear, and the attendant should make records according to the communication and check it repeatedly. If telephone contact is difficult, you can also give the working ticket to the attendant in advance on the day of work.
3.2. 13 The valid time of the first and second working tickets is limited to the approved maintenance period. If the first working ticket is not completed according to the scheduled time, the person in charge of the work shall go through the extension formalities. The extension formalities shall be handled by the person in charge of the work to the person in charge on duty, and the extension of major equipment maintenance shall be handled by the shift supervisor. If the working ticket is damaged and cannot be used any more, a new working ticket should be filled in.
3.2. 14 If it is necessary to change the members of the working class, it must be approved by the person in charge of the work. When it is necessary to change the person in charge of the work, the working ticket issuer shall record the change on the working ticket. If the work task is expanded, the person in charge of the work must pass the work permit and fill in the work items on the work ticket. If safety measures need to be changed or added, a new work permit must be filled in and the work permit procedure must be re-executed.
3.2. 15 The working ticket issuer shall not concurrently be the working director. The person in charge of the work can fill in the working ticket.
Work permit holders shall not issue work tickets.
3.2. 16 The issuing person of the working ticket shall be the person in charge of production, the technicians who are familiar with the personnel, equipment and technical level of this regulation in the breakout and work area (institute), or the personnel approved by the competent production leader of the factory or bureau. The list of working ticket issuing personnel shall be published in written form.
The person in charge of the work and the person on duty (work permit) who are allowed to handle the working ticket shall obtain the written approval of the leader in charge of production in the sub-mine or work area.
3.2. 17 Safety responsibilities of the personnel listed in the working ticket:
3.2. 17. 1 working ticket issuer:
A. the necessity of work;
B. whether the work is safe;
C. Whether the safety measures filled in the working ticket are correct and complete;
D. Whether the person in charge of the assigned work and the working class personnel are appropriate and sufficient, and whether they are in good mental state.
3.2. 17.2 person in charge of work (guardian):
A. organize the work correctly and safely;
B. carry out safety education in combination with the actual situation;
C. supervise and urge employees to abide by this regulation;
D. Be responsible for checking whether the safety measures in the working ticket are correct and complete, and whether the safety measures taken by the personnel on duty conform to the actual situation on site;
E. explain safety matters to employees before work;
F. whether the change of working-class personnel is appropriate.
Work permit:
A. Be responsible for reviewing whether the safety measures listed in the working ticket are correct and complete, and whether they meet the site conditions;
B. Whether the safety measures arranged in the work site are perfect;
C. Be responsible for checking whether the power-off equipment is in danger of sudden call;
D even if you have a little doubt about the contents listed in the working ticket, you must ask the working ticket issuer clearly and make detailed supplements when necessary.
3.2. 17.4 Long value:
Be responsible for reviewing the necessity of work and whether the maintenance period is consistent with the approval period, and whether the safety measures listed in the working ticket are correct and complete.
3.2. 17.5 members of the working class:
Seriously implement this regulation and site safety measures, care about construction safety, and supervise the implementation of this regulation and site safety measures.
3.3 Work Permit System
3.3. 1 After completing the safety measures at the construction site, the work permit holder (the person on duty) shall also:
A. Go to the site with the working director to check the safety measures again, and touch the test by hand to prove that the maintenance equipment has no voltage;
B. Point out the location and precautions of live equipment to the person in charge of the work;
C. sign the working ticket with the person in charge.
After completing the above licensing procedures, the working class can start working.
3.3.2 The person in charge of the work and the work permit holder shall not change the safety measures without authorization, and the personnel on duty shall not change the operation and wiring mode of the maintenance equipment. If there are special circumstances in the work that need to be changed, the consent of the other party should be obtained in advance.
3.4 Work guardianship system
3.4. 1 After the work permit formalities are completed, the person in charge (guardian) shall explain the site safety measures, live parts and other matters needing attention to the shift. The person in charge of the work (guardian) must always be at the work site, carefully monitor the safety of the working class personnel, and promptly correct the violations of safety.
3.4.2 All staff members (including the person in charge of the work) are not allowed to stay alone in the high-voltage indoor and outdoor substation high-voltage equipment area.
If the work needs (such as polarity measurement, loop continuity test, etc.). ), and the specific situation of the field equipment permits, one or more people with practical experience in the working class can be allowed to work in their rooms at the same time, but the person in charge of the work should explain the relevant safety precautions in detail in advance.
3.4.3 When all power supplies are cut off, the person in charge (guardian) can take part in the work of the shift. In case of partial power failure, only when the safety measures are reliable, the personnel are concentrated in one working place and the conductive parts are not accidentally touched can they take part in the work.
The working ticket issuer or the person in charge of the work shall, according to the safety conditions, construction scope and work needs of the site, add a special person to monitor and approve the number of people to be monitored.
Special guardians shall not engage in other jobs at the same time.
3.4.4 During the working period, when the person in charge of the work has to leave the working place for some reason, he shall designate a competent person to temporarily replace him, and clean up the working site before leaving, and notify the working class personnel. When the original person in charge of the work returns to the work place, he should also perform the same handover procedures.
When the working director needs to leave the site for a long time, the original working ticket issuer should be replaced by a new working director, and the two working directors should make the necessary handover.
3.4.5 When the personnel on duty find that the staff violate the safety regulations or endanger the safety of the staff, they should put forward rectification opinions to the person in charge of the work, temporarily stop the work if necessary, and immediately report to the superior.
3.5 Work interruption, transfer and termination system
3.5. 1 When the work is interrupted, the personnel on duty should leave the work site, all safety measures remain unchanged, and the working ticket is still kept by the working director. Continue to work after the interruption, and do not apply for a work permit. After work every day, clean the workplace, open the closed passage and return the working ticket to the attendant. When you return to work the next day, you should get the permission of the attendant to get back the working ticket. The person in charge of the work must carefully check whether the safety measures meet the requirements of the working ticket before working. Without the guidance of the person in charge or guardian, the staff shall not enter the workplace.
3.5.2 Before the working ticket is terminated, the personnel on duty shall not connect the construction equipment for power transmission.
During the interruption of work, if there is an urgent need, the personnel on duty can switch on and send electricity without returning the working ticket. However, the person in charge of the work or the person in charge of the electrical division should be informed of the exact basis that all the staff in the working class have left the work place first, and the implementation can be carried out only after receiving a reply that can send electricity, and the following measures should be taken:
A. Remove temporary fences, grounding wires and signs, restore permanent fences and replace them with "Stop, high voltage danger!" Signboard;
B. A special person must be appointed to wait on all the service roads to inform the working team that "the equipment has been powered on, and it is not allowed to continue working", and the waiting personnel shall not leave the waiting place before the working ticket is returned.
3.5.3 Before the end of the maintenance work, if it is necessary to test the working voltage of the equipment, it can be carried out according to the following conditions:
A. evacuate all employees from the workplace;
B. Take back all working tickets of the system, remove temporary barriers, grounding wires and signs, and restore permanent barriers;
C. The pressure test shall be conducted by the working director and the personnel on duty after comprehensive inspection.
If the work class needs to continue to work, it should re-perform the work permit procedures.
3.5.4 When the same electrical connection part uses the same working ticket to hand over the work in several working places in turn, all safety measures shall be completed by the personnel on duty at one time before the construction starts, without going through the handover procedures. However, when transferring the work place, the person in charge of the work should explain the charged range, safety measures and precautions to the staff.
3.5.5 After all the work is finished, the team shall clean and tidy up the site. The person in charge of the work should carefully check first, and then explain the repair items, problems found, test results and existing problems to the personnel on duty after all the staff have evacuated from the work place, and check the equipment condition, whether there are any remnants and whether it is clean together with the personnel on duty, and then fill in the work end time on the working ticket, and the working ticket will end after both parties sign it.
3.5.6 Only after all working tickets of the same power outage system are finished, all grounding wires, temporary obstacles and signs are removed, and permanent obstacles are restored, and after obtaining the permission of the dispatcher or the person in charge on duty, can the power be switched on.
3.5.7 The completed working ticket shall be kept for three months.
4 technical measures to ensure safety