There are many series resonance AC withstand voltage test set on the market, which are used by electric power workers for power high-voltage withstand voltage test projects. Series resonance AC withstand voltage test is very important, so under what circumstances must use series resonance AC withstand voltage What about the test set ? This article introduces you.
It is necessary to use a series resonance AC withstand voltage test set , which is mainly reflected in the failure to detect the internal defects and insulation defects of high-voltage electrical equipment more accurately when the DC withstand voltage test or the high-voltage test transformer is used for the withstand voltage test. At that time, it is necessary to use a series resonance AC withstand voltage test set to perform a series resonance AC withstand voltage test on high-voltage electrical equipment.
AC Series Resonance Withstand Voltage Test Set
Specifically, 1. When the withstand voltage test cannot truly reflect the electric field distribution in the field test, it is difficult to find the internal defects of the high-voltage electrical equipment. 2. When using DC withstand voltage equipment, the DC voltage will greatly weaken the partial discharge inside the high-voltage electrical equipment. At this time, the internal insulation defects are difficult to detect. 3. When the power frequency AC withstand voltage test is performed, the actual operating voltage waveform reflected by the test is more consistent with the power frequency transient voltage rise during operation, and there is no problem of equivalence. When some of the above phenomena appear in the actual work of electric power workers, it is necessary to use a series resonance AC withstand voltage test device to be more practical and more effective in detecting the withstand voltage of the insulation defect of the tested product. test.
Only by effectively detecting the withstand voltage insulation defects of high-voltage electrical equipment, can the operation of the entire power system be better maintained, and such a withstand voltage test is more effective. Because these large-capacity electrical equipment, such as large generator sets, main transformers, GIS switches, power cables, etc., have insulation tolerance within a certain frequency range and have a certain equivalence with power frequency withstand voltage, so they must be used The frequency conversion series resonance withstand voltage test device can be used for the test. The inductance of the device and the capacitance of the tested product are connected in series to generate a resonance voltage, so that the AC withstand voltage test can be performed. Moreover, the device is very suitable for construction site testing because of its low excitation voltage, small weight and light handling.
Post time: Nov-23-2021