What are the six conditions for changing the switch with electrical appliances?

1. How does the electrician on duty perform the correct switching operation?

Switching operation sequence during power failure and power transmission

Power transmission and closing operation sequence: bus side isolating switch → load side special isolating switch → circuit breaker.

Operation sequence of power failure and switching: circuit breaker → load side isolating switch (circuit breaker) → bus side isolating switch (circuit breaker).

It is forbidden to pull the disconnector (circuit breaker) with load to cut off power and send power.

See illustration:

Reference article

Electrician training Information _ Network Library//Wen Ku. /view/bba5 fcf580eb6294dd886cdb

2. The operation of high-voltage electrician, actual switching and operation ticket are one problem or two problems. What should be paid attention to? Thank you.

It should be a question, first write the operation ticket, then one person reads the ticket and one person operates the simulation screen, and finally one person reads the ticket and one person operates the high-voltage cabinet.

The key is to operate the ticket. As long as the operation ticket is written correctly, there will be no problem with the operation. Pay attention to the operation of the high-voltage cabinet, and don't forget to check the operation ticket.

And after the operation, the teacher will ask some questions, such as how to safely ground the high-voltage cabinet and how to remove the grounding.

3. What are the specific steps and processes of switching between high-equipped rooms and high-equipped electricians? Which one pulls first, which one pulls later, hay cutter.

First low pressure, then high pressure, first shunt, then main brake,

4. Do both electricians need to wear insulating boots when opening and closing the brake?

Wearing insulating boots is to prevent the operator from being hurt by step voltage when the equipment shell has high potential. Article 25 of "Safety Regulations" states: "When operating outdoor high-voltage equipment in rainy days, the insulating rod should be provided with rain cover and insulating boots. If the grounding grid resistance does not meet the requirements, wear insulating boots on sunny days. " In actual operation, the above provisions should be strictly observed, and attention should be paid to wearing insulating boots in the following situations.

(1) During the patrol of electrical equipment, grounding investigation of small current grounding system was included.

(2) patrol and operate the equipment with insulating rods in rainy days and lightning activities.

(3) When someone gets an electric shock and goes to the rescue.

(4) When switching operation and patrol are carried out on the distribution device with unqualified grounding grid resistance.

5. Is it legal to lead someone without an electrician's license to switch on and off the brakes?

If it is illegal, it belongs to illegal command and can be refused.

6. The electrician transformer room brake sequence

When our company built the distribution room, it reported it to China Southern Power Grid, and then China Southern Power Grid issued a set of prescribed hanging boards, which I kept hanging, with white characters on a blue background. . . So I never thought about what to hang (if not, you can also check the power room management regulations, switching management regulations, post responsibilities of electricians entering the network, electricity safety regulations, handover system, safety technical specifications, operation procedures of power distribution facilities, inspection standards and management requirements of the power room. . . However, almost all of them are executive documents, switching work tickets (you should write down the power outage process and the power outage process yourself according to the switch design of your own electric box), and then fill in a power outage work ticket and a power outage work ticket (the basis for the leadership's approval), and then have time to write emergency plans, equipment operation and environmental sanitation inspection records, handover records and responsibility tables (from various records specified). Then the management system of the electrical room is probably completed.

7. What are the risks of electrician's outdoor switch operation?

1, interval error, operation error;

2. Unsupervised operation leads to mistakes, resulting in misoperation;

3. Work in bad weather such as rain;

4. The operating tools and insulating tools (insulating tie rods) are of poor quality;

5. The operating foundation (foundation) is unstable;

6. No operation ticket, no simulation operation, no guardianship, no singing, no audit, no standard ticket face, etc. Found by the leader;

7, the operation is not in place, such as the open does not open, the close is not in place;

8. No sign was hung after the operation;

9. Safety protection measures are not in place, such as safety helmet, insulating gloves, insulating boots, long-sleeved non-chemical fiber clothes and goggles. ;

10, the equipment was not checked before operation, such as whether there is oil in the oil circuit breaker and whether the air pressure in the gas circuit breaker is qualified;

1 1, the unlocking operation is not authorized.

8. What is the use of high-voltage electrician certificate?

If you are engaged in high-voltage electrician operation, you must have a high-voltage electrician operation certificate, and now many units require several levels of high voltage when recruiting electricians. The low-voltage level mainly depends on your work needs. Go to Qingdao Zifeng Registration Hall to handle it quickly.

9. Do I need to fill in a working ticket for the high-voltage electrician certificate exam?

The high-voltage electrician certificate is used to fill in the switching working ticket for internship assessment.

Switching operation is to change the running state of equipment and convert electrical equipment from one state to another.

The first working ticket for power lines:

For the work (whether high voltage or low voltage) that needs to cut off the power supply of high voltage lines and distribution transformers or take safety measures, you must apply for the first working ticket of power lines.

Power line second working ticket:

High and low voltage lines are erected on the same pole, and high voltage lines are electrified. The power outage work on low-voltage lines belongs to the work on live line towers, and the second type of power line work ticket must be handled.

Low voltage first working ticket:

Low-voltage power failure means that the equipment below the low-voltage side switch of distribution transformer needs power failure, and the first low-voltage working ticket must be handled.

Low voltage second working ticket:

When working on low-voltage equipment (including low-voltage lines and low-voltage distribution devices), if the equipment is charged or partially charged, you must apply for a second low-voltage working ticket.

The work of the first working ticket of the substation is as follows:

1) Working on high-voltage equipment requires total or partial power failure.

2) When working on the secondary system and lighting circuit, the power supply of high-voltage equipment must be cut off or safety measures must be taken.

3) When the high-voltage equipment cannot meet the safety distance specified in Table 2- 1 of the high-voltage indoor safety regulations, the high-voltage equipment must be powered off;

4) High voltage electrical test work;

5) Using portable instruments to work on high-voltage circuits requires high-voltage equipment to cut off power supply or take safety measures;

6) Relay protection inspection, if not coordinated with related primary equipment maintenance or test, must be carried out when the whole group is linked with primary equipment test.

The work of the second working ticket in the substation is as follows:

1) works on the shell of live equipment;

2) Work on the control panel, low-voltage switchboard, distribution box and power supply trunk line;

3) Work on the secondary wiring circuit without cutting off the high-voltage equipment;

4) The primary current relay has a special device, which can change the setting value during operation;

5) After work, the personnel on duty shall phase with insulating rods and voltage transformers or measure the current in the high-voltage circuit with a clamp ammeter;

6) The relays and protection devices connected to the secondary winding of current transformer or voltage transformer and installed on the channel or switchboard will not affect the normal operation of the main protection;

7) Enter the substation to engage in civil engineering, painting, production area greening, communication, instrument installation, etc. And it is not necessary to cut off the power supply of high-voltage equipment or take safety measures.

The work of the first working ticket of substation power cable is as follows:

Maintenance of high voltage power cable in power failure.

The work of the second working ticket for substation power cable is as follows:

High-voltage power cable works without power failure.

The storage period of "two tickets" is at least one year.

10. How does the property electrician override the brake?

Power failure, electricity inspection and grounding wire hanging shall be carried out according to the working ticket operation process; The power transmission procedure is just the opposite.