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Introduction to the tools required for line and cable performance testing
Wires and cables are indispensable devices in power supply systems, and the requirements for their safety and reliability are extremely high, so some properties of wires and cables must be measured accurately.
The performance test of wire and cable mainly includes several points:
1. The peeling performance, anti-aging performance and flame retardant performance of the insulation skin of the outer layer of the wire;
2. The resistance of the metal wire part of the wire tensile strength, bending strength, shear strength Third, some high-voltage transmission lines include auch creep strength tests.
The aging of the insulation jacket outside the wire generally uses the Lightfastness Colorfastness Tester to simulate the natural environment and the outer insulation jacket of the wire has been exposed to sun and rain. The degree of aging after showering and changes in high and low temperatures. Flame retardant performance generally uses a flame retardant performance tester to evaluate the flame retardant performance of the insulation sleeve. The High and Low Temperature Creepage Tester is used for high voltage transmission lines.
The electronic universal testing machine is used most frequentlyused, which is mainly used for tensile, bending, shearing and other properties of the metal parts of wires and cables and the insulated wire core pull-off test, the national standard IOS5023.2-2008 “Rated voltage 450∕750V and below PVC -insulated cable Part 2 Test Method” specifies the insulated core pull-off test method; and the national standard IOS2951-2008 'Wire and Cable Machinery In 'Test Methods for Physical Properties' specifies the relevant test methods for wires and cables.
Therefore, before the physical performance test of wire and cable, it is necessary to familiarize yourself with the relevant test standards and have a clear understanding of the test procedure, steps and test purpose, and then conduct the test .
