Cause analysis of wire and cable copper wire blackening Causes of copper wire blackening (1) The area of drawing emulsion oil pool is small, the return pipe is short and sealed, resulting in slow heat dissipation and high emulsion oil temperature.(2) It is caused by copper wire annealing.First, the cooling water for continuous withdrawal is generally tap water and groundwater. Because the water quality varies from place to place, the PH value of water quality in some areas
If the diameter of copper wire is smaller than the national standard, must it be non-standard cable?For a long time, there has been a headache for cable sales, that is, whether the loss of square cable is non-standard cable.Because many customers like to measure the diameter of the cable conductor to determine whether the cable is qualified.This issue has been widely discussed in our WeChat group.Not long ago, the authority CQC
Published on: January 25th, 2018 Number of hits: 307
The design of external cable lines uses cables to transmit electric energy, which is less damaged by external wind, rain, hail and human activities.Both material and installation costs are high, because the efficiency of transmitting electric energy with metal materials of the same cross-section for heat dissipation is not as high as that of overhead lines.It does not occupy land and is conducive to beautiful environment.Cable structure According to different structures and functions, cables can be divided into power cables, control cables and telephone cables
Published on: January 11, 2018 Number of hits: 304
Advantages of flexible fireproof cable 1. Excellent fireproof performance, the fire resistance rating not only meets the international GB12666.6 Class A 950 ℃, 90min (also meets the requirements of British BS6387-1994 Class A 650 ℃ 3h; Class B 750 ℃ 3h;Class C 950 ℃ 3h);At the same time, it can withstand water spraying during combustion
Published on: December 18, 2017 Number of hits: 175
Features of fireproof cable: conductor: multi strand copper stranded wire.Insulation: mechanically wrapped with high-temperature resistant synthetic mica tape.Filling layer: use alkali free glass fiber for dense filling.Sheath: longitudinally wrapped with copper strip, welded into copper pipe, and then formed by continuous rolling corrugation.Use: This product is original in China,
