How to install the grounding wire for multi circuit power outage maintenance of the same tower

When installing grounding wires on the multi-circuit lines erected by the same tower, low voltage should be installed first, high voltage should be installed later, the lower layer should be installed first, the upper layer should be installed later, and the near side should be installed first, and the far side should be installed later.

The order of demolition is reversed.

In order to ensure that when the equipment is overhauled, someone suddenly missends the power and the static electricity generated by the equipment itself causes harm to the maintenance personnel, so the ground wire should be hung in the electrical equipment maintenance. The grounding wire is a safety barrier to protect maintenance personnel and a lifeline for power employees.

The role of the grounding wire.

First, the remaining charge on the maintenance equipment can be discharged into the ground; Second, the induced charge generated by the maintenance equipment due to the proximity of the charged body can be discharged into the earth; Third, when a sudden call occurs, the power supply current can be short-circuited and grounded to limit the increase of the voltage of the maintenance equipment to the ground.

The principle of installing a grounding wire.

1) Grounding wires should be installed on each incoming side that may be sent to the maintenance equipment.

2) When there is a possibility of dangerous induced voltage, the grounding wire should be appropriately added.

3) When the line is working, grounding wires should be installed on both sides of each working lot, and grounding wires should be installed at both ends of the working place even if there is a power supply at one end.

Precautions for installing a grounding wire.

The installation of grounding wire is an important electrical safety technical measure, and the operation process should be serious, serious and in line with the requirements of technical specifications. Attention should be paid to the following matters in the use of grounding wires:

1) The grounding wire must be checked before operation. The grounding wire should be within the test cycle. The soft copper wire should have no broken ends and broken strands, the metal connection and screw connection should not be disconnected or loose, the elastic force of the wire hook should be normal, and it should be repaired or replaced in time if it does not meet the requirements.

2) Electricity must be checked before installing the grounding wire. Insulating rods should be used for the installation of grounding wires. The handshake part of the insulating rod should be clearly marked.

3) The grounding wire should be connected to the grounding end first, and then the conductor end, and the grounding wire should be in good contact and reliable. During installation, the human body shall not touch the grounded wire or ungrounded wire.

4) When driving the grounding pile, it is necessary to ensure the grounding quality, and can quickly dredge the accident and large current by the ground. It is strictly forbidden to use other metal wires instead of grounding wires.

5) When installing grounding wires on multi-layer power lines erected by the same tower, low-voltage should be hung first, and then high-voltage should be hung; Hang the lower layer first, then hang the upper layer; Hang the near side first, then hang the far side.

6) The on-site work shall not be less connected to the ground wire or the location of the ground wire shall be changed without authorization.

7) The grounding wire should be numbered in a standardized manner and the font should be eye-catching. The number of the grounding wire should correspond to the storage location one by one, and the grounding wire stored in the warehouse should not have scrapped products; The number of the grounding wire in use should be consistent with the number of the grounding wire filled in and the actual installation site filled in by the work (operation ticket).

8) After the work is completed, the grounding wire should be removed in time. The order of removing the grounding wire is reversed from the installation.

9) Take care of the grounding wire. The grounding wire should not be twisted when used, and the soft copper wire should be coiled when not in use. After the grounding wire is removed, it shall not be thrown directly downwards from the air, thrown anywhere or transitioned downward through the grounding wire, and shall be passed by ropes. Pay attention to the cleanliness of the grounding wire.

Abstract: When installing the grounding wire on the power failure line of the multi-circuit part of the same tower, the following matters should be noted. Depending on the length of the maintenance section and the strength of the induced voltage, each section needs to be connected to the ground.

When the distance is long, the ground wire can be hung at the appropriate place at both ends and in the middle to ensure that in case of accidental contact caused by the maintenance line is electrified, the staff will not be seriously harmed by it, and can still be protected by the grounding wire.

Summary. 1. Install the grounding rod or grounding wire on the support frame, the general height is 3-4 meters, the diameter of the grounding rod is 10-15 mm, the diameter of the grounding wire is 6-8 mm, the length of the grounding rod or grounding wire is not lower than the height of the support frame, the grounding rod should be in close contact with the support frame, and the grounding wire should be wound around the grounding rod; 2. Fill the gap between the grounding rod or grounding wire and the support frame to ensure the contact between the grounding rod or grounding wire and the support frame; 3. Stretch the length of the grounding rod or grounding wire to the highest point of the multi-layer frame on the power line, and install the grounding rod or grounding wire on each layer; 4. Connect the grounding rod or grounding wire to the grounding system, install the grounding wire on the grounding rod and grounding wire, and connect the grounding wire with the grounding system; 5. Carry out anti-corrosion treatment on the grounding rod or grounding wire to ensure the life of the grounding rod or grounding wire; 6. Connect the grounding rod or grounding steel wire on the support frame with the grounding rod or grounding steel wire of the multi-layer frame to form a closed grounding system for grounding detection; 7. Protective measures should be installed on the support frame for installing grounding rods or grounding wires to prevent personnel and animals from coming into contact with grounding rods or grounding wires to ensure personal safety.

What is the installation method of installing the grounding wire of the multi-layer power line erected by the same pole (tower).

1) When the multi-layer power line shelter road erected by the same tower is used for power inspection, the low voltage is checked first, and the high voltage is checked later; a priori the lower layer, a later upper layer; The first macro waiter pretends to test the near side, and then the far side. (2) When the multi-layer power line erected by the same tower is connected to the ground wire, it should be discussed first to hang the low voltage and then hang the high voltage; Hang the lower layer first, then hang the upper layer; Hang the near side first, then hang the far side.

1. Install the grounding rod or grounding wire on the support frame, the general height is 3-4 meters, the diameter of the grounding rod is 10-15 mm, the diameter of the grounding wire is 6-8 mm, the length of the grounding rod or grounding wire is not lower than the height of the support frame, the grounding rod should be in close contact with the support frame, and the grounding wire should be wound around the grounding rod; 2. Fill the gap between the grounding rod or grounding wire and the support frame to ensure the contact between the grounding rod or grounding wire and the support frame; 3. Stretch the length of the grounding rod or grounding wire to the highest point of the multi-layer frame on the power line, and install the grounding rod or grounding wire on each layer; 4. Connect the grounding rod slag ruler or grounding wire to the grounding system, install the grounding wire on the grounding rod and the grounding wire, and connect the grounding wire with the grounding system; 5. Carry out anti-corrosion treatment on the grounding rod or grounding wire to ensure the life of the grounding rod or grounding wire; For example, the bridge 6, the grounding rod or grounding steel wire on the support frame is connected with the grounding rod or the grounding steel wire of the multi-layer frame to form a closed grounding trap stool system and carry out grounding detection; 7. Protective measures should be installed on the support frame for installing grounding rods or grounding wires to prevent personnel and animals from coming into contact with grounding rods or grounding wires to ensure personal safety.