Wire and cable fault analysis
NEW

2013-02-22

Wire and cable fault analysis

Fault analysis is an important work to ensure the safe operation of the cable line system. Attaching importance to this work is the basis for eliminating the causes of cable faults and the strong basis for improving cable technology, including line design, cable manufacturing and operation. Although the cable structure, including the design of accessories, has been carefully studied in the production process and passed a series of relevant tests before it was put into operation, these are not all realistic simulations of the long-term operation of individual actual cable lines. Therefore, the occurrence of cable line failures can be determined in which links it is necessary to improve. If only to meet the rush to repair the cable fault and ignore the analysis of the cause of the failure

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Cable line barrier test
NEW

2013-04-14

Cable line barrier test

The cable line barrier test can use test methods such as DC bridge, AC meter or line pulse tester. Compared with the general DC test method and AC test method, the pulse test method has the following advantages: it can determine the line obstacle in a very short time; it can determine the distance of the obstacle with high accuracy; it can distinguish the location of several obstacles existing at the same time; the operation is simple and convenient, easy to master, and the test results can be read directly from the indicator. However, it is not very effective to use pulses to check the obstacles of poor line insulation, so it needs to be used in conjunction with other methods. Use a pulse tester to test line obstacles, which are in the line under test.

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Repair cable internal fault
NEW

2013-04-14

Repair cable internal fault

Removal of moisture inside the cable When the cable or cable near the joint is damp less than 3m, the lead sleeve can be longitudinally dissected. After the moisture is removed by the above method, the lead sleeve can be longitudinally sectioned or wrapped with a lead sleeve larger than the outer diameter of the cable lead sleeve before sealing and welding. If the damp core wire exceeds 3m. Then connect this section of cable. Change cable Prepare a new cable longer than the cable to be removed for change. Before the connection is changed, the new and old cable cores must be numbered and paired one by one to avoid wrong connection and audio calls. When the connection is changed, the two connection points should be paired once, paired and paired, I .e. the two parties should pair with the new cable first.

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Cable Splice Fault Repair
NEW

2013-04-14

Cable Splice Fault Repair

Before cutting the joint, check whether there is water and moisture in the joint. If there is, the joint cannot be cut with a blowtorch, because the heating of the blowtorch causes moisture to rush to the inside of the cable from both sides of the joint. It is better to cut the sleeve with a hammer and a cutter. If there is no moisture and moisture, the lead sleeve can be ironed with a blowtorch to remove the lead sleeve dirt, scrape off the rust spots, scum and remove the solder slag, for reuse. Moisture can be removed by baking. It is baked with a blowtorch or charcoal fire to drive away moisture. This method can only be used with a small amount of moisture. When the paper insulated core wire is seriously damp, the wax pouring method can be used to remove moisture with hot wax.

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Several Common Flame Retardants and Their Flame Retardant Principle
NEW

2013-04-19

Several Common Flame Retardants and Their Flame Retardant Principle

1. Halogen flame retardant: This is the most commonly used flame retardant at present. Its flame retardant principle is that halogen-containing flame retardant generates halogen-hydrogen acid when exposed to fire. This is a non-combustible gas with a large proportion. Around the burning material, it plays a role in isolating oxygen; in addition, halogen flame retardants also have the effect of capturing OH roots. 2. Phosphorus (boron)-containing flame retardant: Phosphorus (boron)-containing flame retardant mainly forms a non-combustible liquid film of phosphorus (boron) acid during combustion, and its boiling point can reach 300°C; At the same time, phosphoric acid further generates metaphosphoric acid, which is a very stable solid-phase polymer, covering the combustible, and covering the liquid phase and solid phase.

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Wire and cable quality testing three important indicators
NEW

2017-06-02

Wire and cable quality testing three important indicators

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International Business:0871-67334199
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Company Headquarters: 11th Floor, Tower 1, Dongju Jiaxin Business Center, Guandu District, Kunming City, Yunnan Province
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