Before the cable is put into operation, a voltage withstand test is required. The usual test methods include using an ultra-low frequency cable voltage withstand tester for AC voltage withstand test, a series resonance test device for AC voltage withstand test, and a DC high-voltage generator for DC voltage withstand test. The ultra-low frequency cable withstand voltage tester is mainly designed and manufactured for non-destructive insulation withstand voltage testing of 35kV and below voltage cables, motors, etc. The voltage waveform of the ultra-low frequency cable withstand voltage tester mainly includes sine wave and cosine wave.
Advantages:
1. In ultra-low frequency systems, the required power is very low. In theory, compared to the 50Hz system, the 0.1Hz system is 500 times smaller, so the equipment is small in size, light in weight, and has a cost similar to that of a DC testing system. The 0.1Hz ultra-low frequency test can effectively inspect the production and installation quality of rubber plastic cables, generators, transformers and other equipment, assess the insulation strength of the main insulation, cable terminal heads, and intermediate joints of generators and pilot controlled transformers, and more sensitively detect obvious defects such as mechanical damage.
2. When used for partial discharge measurement, the interference of 50Hz AC can be suppressed.
3. The 0.1Hz ultra-low frequency test can effectively inspect the production and installation quality of rubber plastic cables, generators, transformers and other equipment, assess the insulation strength of the main insulation, cable terminal heads, and intermediate joints of the generators and transformers, and sensitively detect obvious defects such as mechanical damage. The 0.1Hz ultra-low frequency withstand voltage test is still an AC withstand voltage test, which can effectively detect defects in capacitive equipment. Practice has shown that the breakdown voltage of the cable when using ultra-low frequencies is equivalent to the voltage value obtained by using power frequency AC.
The ZC-524 B ultra-low frequency and high voltage generator combines modern digital frequency conversion advanced technology, adopts microcomputer control, and is fully automated in boosting, reducing, measuring, and protecting. It can also undergo manual intervention during the automatic boosting process. Due to its fully electronic design, it has a small size, light weight, large screen LCD display, clear and intuitive display, and a printer that outputs test reports.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase.
