为大家介绍在电线电缆质量检测的三大重要指标。
Introduce the three important indicators for wire and cable quality inspection.
一、绝缘电阻的测试
1、 Testing of insulation resistance
绝缘电阻式是反映电线电缆产品绝缘特性的重要指标，与耐电强度、介质损耗以及绝缘材料在工作条件下的逐渐劣化密切相关。
Insulation resistance is an important indicator reflecting the insulation characteristics of wire and cable products, closely related to electrical strength, dielectric loss, and the gradual deterioration of insulation materials under working conditions.
通过测量绝缘电阻，可以发现工艺中的缺陷，如绝缘干燥不透或护套损坏受潮；绝缘被污染，并混入导电杂质；各种原因引起的绝缘开裂等。电线电缆在运行中，经常要检测绝缘电阻和泄漏电流，以此作为是否能够继续安全运行的主要依据。
By measuring insulation resistance, defects in the process can be found, such as insulation being dry and impermeable or the sheath being damaged and damp; The insulation is contaminated and mixed with conductive impurities; Insulation cracking caused by various reasons. During the operation of wires and cables, insulation resistance and leakage current are often tested as the main basis for whether they can continue to operate safely.
二、电容及损耗因数的测量
2、 Measurement of capacitance and loss factor
电缆加上交流电压，就有电流流过。当电压的幅值和频率一定时，电容电流的大小与电缆的电容(Cx)成正比。对于超高压电缆，该电容器的电流可能达到与型槽模具 一次性止血带 保定水处理设备 一次性止血带 保定空压机 北京真空泵额定电流可以相比的数值，这成为限制电缆容量和传输距离的重要因素。因此电缆的电容也是电缆的主要电性能参数之一。
By adding AC voltage to the cable, a current flows through it. When the amplitude and frequency of voltage are constant, the magnitude of capacitive current is proportional to the capacitance (Cx) of the cable. For ultra-high voltage cables, the current of the capacitor may reach a value comparable to the rated current, which becomes an important factor limiting cable capacity and transmission distance. Therefore, the capacitance of the cable is also one of the main electrical performance parameters of the cable.