The main application fields of Power Frequency AC Test Source are:

• High Voltage Testing Transformers are a vital component of a High Voltage Laboratory. The are used to perform the one minute Power Frequency withstand test (also called as Hi-pot testing) for High Voltage power apparatus like Power transformers, motors, generators , switchgear and overhead insulators (both under dry and wet conditions). In many cases, to get the required voltage the transformers must be connected in Cascade.


• High Voltage Testing transformers are also used as a source for measurement of Capacitance, tanδ and partial discharges in High Voltage power equipment. In most of the cases a single high voltage testing transformer is used.


• High Voltage Power Frequency Testing transformers are extensively used in breakdown studies of various solid, liquid, gaseous insulating materials with different electrode combinations.


• They also serve as a source for DC Charging set of the Impulse Voltage Generator and in generating high DC voltages.