Bulky test transformer or resonant transformer to provide sufficient power capacity
Very low frequency (VLF) withstand voltage test is an advanced testing method used to evaluate the insulation performance of large power equipment, especially suitable for capacitive test objects such as long cables, large generators, and transformers. It effectively solves the difficulties caused by large-capacity equipment in field testing by using AC high voltage at a frequency of 0.1Hz or lower, replacing the traditional 50Hz power frequency withstand voltage test.
