Electrical engineering knowledge What matters should be paid attention to during the construction of

First of all, the most important difference between the switching station and the substation is that there is no main transformer, and the other construction modes are the same.

Secondly, the construction of the switch station is a civil engineering division project according to our understanding in the industry, and the construction can be carried out according to the design requirements, mainly to do the equipment foundation, cable trench and the requirements are not the same as the general construction project.

Finally, special attention should be paid to the construction sequence of the foundation part, and the interaction between the retaining wall, the drainage in the station, and the sewage treatment. Pay attention to the cross-operation after the entry of the electrical division, such as the intersection of the main grounding grid laying and the civil part of the whole station.

Each electrical equipment at the construction site should have its own switch box, and the "one machine and one gate" system must be implemented.

1. The switch box should have a final distribution box, and the switch box should have a machine and a gate and a leakage, and each electric device should have its own switch box, and it is strictly forbidden to use a switch appliance to directly control two or more electrical equipment.

2. The power distribution box and the lighting distribution box should be set up separately, if they are placed in the same distribution box, the power and lighting circuits should be set up separately, and the lighting line Lingming wiring should be on the upper side of the power switch.

3. The distribution system should be equipped with indoor general distribution box and outdoor distribution box or outdoor general distribution box and distribution box to implement hierarchical power distribution.

Basic conditions that should be available at the electrical construction site:

1. It is strictly forbidden to work without safety training and unqualified safety examinations.

2. Electricians must hold an electrical work permit.

3. It is not allowed to go to work after drinking, and it is not allowed to drink alcohol in class.

4. You must wear labor protection equipment before taking up your post, otherwise you are not allowed to work.

5. When overhauling electrical equipment, it is necessary to refer to other relevant technical regulations, and if you do not understand the precautions of the equipment specifications, you are not allowed to operate it privately.

6. It is strictly forbidden to dry clothes and various items on the wire.

7. When working at high altitude, you must fasten your seat belt.

8. Correct use of electrical tools, all insulating tools, should be properly kept, other use is strictly prohibited, and should be regularly inspected and calibrated.

9. When there is a voltage higher than the safety of the human body, it is strictly forbidden to carry out maintenance with live operation.

10. Electrical maintenance, maintenance operations and dangerous work are strictly forbidden to work alone.

11. Before the maintenance of the electrical equipment, the person in charge of the maintenance project must hold a pre-maintenance safety meeting.

12. Without determining whether the wires are electrified, it is strictly forbidden to cut two or more wires at the same time with vices or other tools.

13. It is strictly forbidden to move equipment higher than the safe voltage of the human body with electricity.

14. It is strictly forbidden to hold lighting equipment that is higher than the safe voltage of the human body.

15. Hand-held power tools must be pure leather to use leakage protector, and before use, press the protector test button to check whether it is normal and usable.

Hello, thank you for your support to the platform, the electrical construction site should have the basic conditions: 1. The production conditions and safety facilities at the job site should meet the requirements of relevant standards and specifications, and the labor protection equipment of the staff should be qualified and prepared; 2. Places where people often work and construction vehicles should be equipped with first-aid kits to store first-aid supplies, and special personnel should be designated to check, supplement or replace; 3. The safety equipment used on site should be qualified and meet the relevant requirements.

According to the requirements of the temporary electricity code, each electrical equipment on the construction site should have its own special switch box, and the system of one machine and one gate must be implemented. It is strictly forbidden to use the same switch to directly control two or more electrical equipment (including sockets).

Summary. 3) The selection of leakage protector should meet the requirements of GB6829-86 "Leakage Current Action Protector (Residual Current Action Protector)", the rated leakage action current of the leakage protector in the switch box should not be greater than 30mA, and the rated leakage action time should be less than that of the leakage protector used in wet and corrosive medium places. The rated leakage action should not be greater than 15mA, and the rated leakage action time should be less than that of the power cord entering the switch box, and it is strictly forbidden to use bolt connection.

Each electrical equipment on the construction site should have its own switch box, what system must be implemented?

Dear, hello, each electrical equipment at the construction site should have its own switch box, must implement a machine and a gate system, 1) each electrical equipment should have its own special switch box, must implement a machine and a gate system, it is strictly forbidden to use the same switch electrical appliances to directly control two and more than the world electrical equipment (including sockets). 2) A leakage protector must be installed in the switch box. If the working environment is dry, the electrical equipment of 36V and below can be exempted from installing leakage protectors.

3) The selection of leakage protector should meet the requirements of GB6829-86 "Leakage Current Action Protector (Residual Current Action Protector)", the rated leakage protector in the switch box should not take more than 30mA, and the rated leakage action time should be less than that of the leakage protector used in wet and corrosive medium places. The rated leakage action should not be greater than 15mA, and the rated leakage action time should be less than that of the defeated power cord entering the switch box, and it is strictly forbidden to use bolt connection.

6) All electrical boxes and switch boxes must be in accordance with the following order of operation in use. a.Transmission Order:

The main distribution box distribution box switch box BPower outage sequence: switch box, distribution box, main distribution box (except for sensitive shortage emergencies in the event of electrical failure) 7) When replacing the melt of the Iwano fuse, it is strictly forbidden to replace it with a melt that does not meet the original specifications.

1. The indoor floor of the switch station must be higher than the outdoor floor, and the general height difference is about 15cm

2. The indoor net elevation of the switch station must also meet a certain height, and the net height of the Shanghai area must be met

3. The switch station is generally equipped with two gates, and the doors are made of steel

4. Smoke alarm devices and other fire-fighting facilities must be set up in the switch station to meet the requirements of fire acceptance

5. There should be at least two grounding places in the switch station, and the cable trench angle iron should be connected in series to the grounding body.

Strictly speaking, the switch station building must be set up separately, and mixed construction is prohibited.

You can check the precautions in the library.