The 0.1Hz ultra-low frequency high voltage generator is a new ultra-low frequency AC testing device with sine wave or cosine square wave as the output source. What are the advantages of the application of 0.1Hz ultra-low frequency high voltage generator for the nondestructive insulation and withstand voltage test of power cables?
1. Effectively detect end insulation defects
When the same voltage is applied, the 0.1Hz ultra-low frequency withstand voltage test device produces a smaller voltage drop on the generator rod than the traditional power frequency withstand voltage test device, so it can expand the withstand voltage range and make it easier to find out the insulation defects of the generator.
2. Reduce the damage of corona proof layer at the end of stator winding
Compared with the traditional power frequency voltage withstand test device, the 0.1Hz ultra-low frequency voltage withstand test device produces less capacitive current during the voltage withstand test, and the electric energy generated by the corona layer is also smaller, so as to reduce the impact on the stator winding. The anti corona layer at the end is damaged.
3. Reduce insulation damage of generator
During the ultra-low frequency voltage withstand test, the partial discharge of the generator is very small, which is about 1/3750 of the power frequency voltage withstand test, and the degree of insulation damage to the generator is significantly reduced. If the insulation layer of the generator is weak, it may be further encountered during the power frequency voltage withstand test, which will eventually lead to insulation within a year or two, laying hidden dangers for the safe operation of the generator. The ultra-low frequency voltage withstand test device can better protect the insulation layer of the generator, so as to prolong the service life of the generator and reduce the probability of generator accidents.
ZC-524B ultra-low frequency and high voltage generator combines modern digital frequency conversion advanced technology, adopts microcomputer control, and the boost, step-down, measurement and protection are fully automated, and manual intervention can be carried out in the process of automatic boost. Because it is fully electronic, it has small volume, light weight, large screen LCD display, clear and intuitive, and the printer outputs the test report. The design index fully conforms to the power industry standard of "general technical conditions for special testing instruments for power equipment, Part 4: General technical conditions for ultra-low frequency and high voltage generators", which is very convenient to use.