Wire and cable testing equipment is an important part of the national standard wire and cable. The more advanced the quality inspection department within a wire and cable company, the better and more trustworthy the wire and cable produced by the company. The stricter the third-party quality inspection department, the more conducive to the development of this industry.
The following are several important indicators of wire and cable testing equipment, which are the most critical indicators for measuring wire and cable.
①Measurement of wire DC resistance:
The conductive core of wire and cable mainly transmits electrical energy or electrical signal. The resistance of the wire is the main indicator of its electrical performance. The core resistance of the wire is larger than that of the DC voltage due to the skin effect and the proximity effect surface when the AC voltage is applied, but the difference between the two is very small when the electric eye frequency is 50Hz. Now the standard stipulates all of them can only be required to detect whether the DC resistance or resistivity of the wire core exceeds the value specified in the standard. Through this inspection, some defects in the production process can be found: such as wire breakage or part of the single wire breakage; Conforms to standards; incorrect length of product, etc. For power cables, it can also be checked whether it will affect the allowable current carrying capacity of wire and cable products in o