20 measures to prevent electric shock casualties i

2022-08-23
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20 measures to prevent personal electric shock casualties in power production

when switching operation, electrical operators must be carried out by two people, one of whom is familiar with the equipment as a guardian, and the other operates. Operators should wear safety helmets, insulating boots and insulating gloves. Rain proof measures shall be taken for operation in rainy days. Do not operate in case of lightning

to realize human-computer interaction and complete the switching operation of data exchange equipment with the lower computer, the operation ticket must be used carefully, seriously and correctly, and the "six checks" of switching operation must be implemented during the implementation of the operation:

(1) operation preparation. When the dispatcher notifies to fill in the ticket, the operator must clarify the operation purpose, task, scope of power failure, operation mode, corresponding changes in protection and automatic devices, as well as the safety tools and instruments to be used in the operation, and make ideological and material preparations

(2) the operation ticket is closed. When receiving the dispatching operation order, the operation task shall be filled in the task bar of the operation ticket after review, and it shall be filled in one by one according to the operation steps. The operation ticket is filled in by the deputy shift supervisor and reviewed by the positive value. In case of major or complex operations, the station master should increase the level of review

(3) what kind of products are there to let customers know what products are included in the experimental machine? Off. Before the dispatching order, the power plant and substation shall first inform the dispatcher of the name of the plant, the name of the station and the name of the person on duty. When you can use the ear ball to blow away the command, the positive command is received and the Deputy monitor. After repeating the command without error, the operation can be carried out with the consent of the dispatcher. If the operation of the plant (station) has an impact on the electrical system, you should ask the dispatcher clearly. If you have questions about the operation, you should study and solve them with the dispatcher

(4) simulation panel preview off. The analog panel should be consistent with the operation mode. The positive and negative operators rehearse on the simulation panel according to the steps filled in the operation ticket, and then operate after there is no error. The ground wire should also be marked on the simulation panel. In case of emergency command, the rehearsal can not be carried out, and the operation can be carried out first, and then the position on the simulation panel can be changed

(5) operation monitoring off. During the operation, the supervisor should carefully supervise the operator and correct the incorrect actions of the operator in time. The operator can only operate after the supervisor sings the ticket and confirms it. Carefully check the operation quality after operation, and finally check the items after operation. After the operation is completed, record the time, reply to the dispatcher, stamp the "executed" seal on the operation ticket, and sign the guardian and operator

(6) operation quality check off. When operating the circuit breaker, check the indicator light, meter and on-off indicator. When operating the disconnector, check that the three phases should be synchronized, the pull and close should be in place, and the positioning pin on the operating handle should be well pinned. After the main transformer and arc suppression coil are inverted, the path should be measured, and the direct resistance should be measured if necessary. When hanging the ground wire, first connect the ground terminal. The grounding should be firm and reliable. The ground wire should not be twisted and should not contact with human body. Lock the pin of the disconnector that can send power once it is closed. When problems occur during operation and unlocking operation is required, the reason should be found out and forced operation is prohibited

2 safety measures for line personnel switching operation

line personnel must be operated by two people, one for operation and one for supervision during switching operation. Operators should wear safety helmets, insulating shoes and insulating gloves. The operation ticket must be used carefully, seriously and correctly. When accepting the operation order, it should be clear. The receiver should repeat the order to the sender and check it. Before operation, it should be checked according to the order of the operation ticket and the simulation diagram board. After operation, it should check the equipment number and the disconnection or closing position of the equipment. After the operation, the receiver shall immediately report to the sender. In the process of operation, it is necessary to operate item by item according to the order of the operation ticket, and make a "√" mark after completing one item. Fasten the safety belt when climbing the pole. Rain proof measures shall be taken for operation in rainy days. Do not operate in case of lightning

3 safety measures for operators of power plants and substations

when inspecting electrical equipment, operators should wear insulating shoes and safety helmets. Generally, two people should work together. When a single person is allowed to patrol the electrical equipment with the approval of the leader, no other work shall be carried out, and no barrier in the equipment area shall be removed or crossed. During the inspection of electrical equipment in thunderstorm days, insulating boots should be worn, and lightning arresters and lightning rods should not be near. When the high-voltage electrical equipment is found to be disconnected and grounded during the inspection of the equipment, it is not allowed to approach the fault point within 4 m indoors and 8 m outdoors. To enter the above range, you must wear insulating boots. When you want to contact the shell and structure of the equipment, you must wear insulating gloves

4 safety measures for line patrol inspection by line operators

people with line work experience can serve as line patrol inspection tasks alone. New personnel shall not patrol the line alone. Patrol inspection in remote mountainous areas and at night must be carried out by two people. When necessary in summer and heavy snow, it should be carried out by two people

it is forbidden to climb the pole and tower when one person patrols the line. The line patrol inspection at night shall be carried out along the outside of the line, and in windy weather, the line patrol inspection shall be carried out along the windward side of the line, so as to avoid touching the conductor that will emit more greenhouse gases during the production process of broken magnesium parts. In case of an accident, the line patrol inspection shall always consider that the line is live, even if it knows that the line has been powered off

when the line patrol personnel find that the conductor is broken, they should try to prevent pedestrians from approaching within 8 m of the broken line point, and quickly report it for treatment

5 safety measures for maintenance personnel working on electrical equipment

when working on electrical equipment (lines), four organizational measures and four technical measures should be taken to ensure that no personal injury or death accidents occur

5.1 four organizational measures

(1) work ticket system. When working on electrical equipment (lines), you must fill in the work ticket or follow the order

(2) work permit system. To work on electrical equipment (lines), in addition to handling work tickets, you must also get the permission of the work permit person and go through the necessary work permit procedures before working

(3) work supervision system. Work on electrical equipment (lines) must be carried out under the supervision of the supervisor, and it is not allowed to work without supervision

(4) work interruption, transfer and termination system. If a work is not finished on the same day, it needs to be interrupted the next day to call the work interrupted; In the same electrical connection part, with the same work ticket, transfer work in several working places in turn is called work transfer; The completion of a work is called the end of the work. These three situations need to go through certain procedures. This system is called work interruption, transfer and termination system

5.2 four technical measures

when working on electrical equipment (lines) with total or partial power failure, four technical measures must be taken before starting the work. These four technical measures are:

(1) power failure. Before work, a series of work related to power failure must be done well

(2) electricity test. Verify whether there is electricity

(3) install the grounding wire (close the grounding knife switch). Work done to prevent sudden calls from injuring on-site staff and discharge the residual charge of the disconnected part of the equipment

(4) hang signs and install barriers. In order to warn the on-site staff and other personnel, hang "no switching on, someone working" and "stop, high voltage danger" at the working place and relevant positions Wait for some signs and install some temporary barriers

6 safety measures for working on rotating generator and synchronous condenser

(1) generally, it is forbidden to work on the circuit of rotating generator and synchronous condenser, and it is forbidden to touch the high-voltage winding by hand. If it is necessary to carry out emergency repair without stopping the machine, the excitation circuit should be cut off first, the automatic de excitation device should be put into operation, and then the stator outgoing line and the neutral point should be short circuited and grounded. When disassembling the short-circuit grounding wire, wear insulating gloves, insulating boots or stand on the insulating pad and wear goggles

(2) it is allowed to adjust and clean the brushes and slip rings on the rotating generator and synchronous condenser, but this work must be undertaken by experienced people. When working, the cuffs must be fastened, and the hair and braids must be put into the hat to prevent clothes and materials from being caught by the machine. When working, stand on the insulating pad, and do not contact two poles at the same time, or contact one pole and the grounding part at the same time, nor do two people work at the same time

(3) it is allowed to measure the shaft voltage and rotor insulation level on the rotating generator and synchronous condenser, but a special brush must be used, and the brush should be equipped with an insulation handle of more than 300 mm

7 safety measures for working on rotating high-voltage motors

(1) generally, it is forbidden to work on rotating high-voltage motors and their auxiliary device circuits. If it is necessary to work on the rotor resistance circuit of the rotating high-voltage motor, the carbon brush should be lifted first or the resistance should be completely removed. Wear insulating gloves or tools with insulating handles, wear insulating boots or stand on insulating mats when working

(2) the outgoing line, cable head and exposed rotating parts of the motor shall be equipped with fixed barriers or shields to prevent personnel from electric shock

(3) the shell of motor and starting device should be grounded to prevent electrostatic induction electric shock

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