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Company: Henan Lubao Special Cable Co., Ltd.

Contact: Manager Su

Mobile: 13838110230

Email: 349614665@qq.com

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Address: No. 13 Workshop B, Tiantan Venture Park, Huling Industrial Gathering District, Jiyuan City, Henan Province


Do you know the common sense of wires and cables?

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Do you know the common sense of wires and cables?

作者: Release Date: 2018-11-22 Author: Click:

Do you know the common sense of wires and cables?


1. Why is it necessary to install a return wire laid parallel to the cable in the grounding method of one end of the single-core cable sheath?

In rubber cables used in coal mines, in a cable line grounded at one end of a metal sheath, in order to ensure that the induced voltage in the sheath does not exceed the allowable standard, a conductor laid in parallel along the cable line must be installed, and both ends of the conductor are grounded. Called the return line. When a single-phase ground fault occurs, the ground short-circuit current can flow back to the center point of the system through the return line. Since the magnetic flux generated by the ground current through the return line cancels out the magnetic flux generated by the ground current of the cable conductor, it can reduce the Induced voltage of the sheath during a short circuit fault. Henan wire and cable .

河南电线电缆

2. How many cable projects can be divided into?

(1) Construction site transportation: including loading and unloading of engineering materials from the warehouse to the construction site, transportation, and empty car return.

(2) Local engineering: including road surface excavation, tunnel and trench construction.

(3) Laying project: Including laying, making of intermediate head, lifting cover plate, buried pipe, tide proofing, making of traction head, etc.

(4) Projects at both ends: including the production and installation of supports, suspension bridges and their foundations, the production of terminal heads, the installation of oil pressure and signal devices, and electrical performance testing of various types.

(5) Plugging works: including the production of oil-filled cable plug ends, the installation of oil supply tanks, automatic drainage and signaling devices.

(6) Grounding works: Insulation joints, transposition boxes, protectors, ground box installation, etc. Henan wire and cable.

3. What inspections should be carried out for the acceptance of cable lines?

(1) The cable specifications should meet the requirements, the arrangement should be neat, no damage, and the signs should be complete, correct and clear;

(2) The fixed bending radius of the cable, the relevant distance, and the connection of the metal sheath of the single-core power cable should meet the requirements;

(3) There is no oil leakage at the cable terminal and middle head, and the installation is firm. The oil pressure and meter setting of the oil-filled cable should meet the requirements;

(4) Good grounding; Henan wire and cable.

(5) The color of the cable terminal is correct, and the metal parts such as the bracket are painted completely;

(6) There should be no sundries in the cable trench, the tunnel and the bridge, and the cover plates should be complete.


URL of this article: http://herzheart.com/南方双彩网/433.html

Keywords: Zhengzhou wire and cable , Henan wire and cable , wire and cable manufacturer

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