Impulse Voltage Test of Power Transformers


During the Lightning Impulse (LI) test of transformer windings with a low impedance it is difficult to ensure a minimum time to half-value of 40 μs in accordance with IEC 60076-3 and IEC 60060-1. This is caused by the oscillating discharge determined by the impulse voltage test generator capacitance and the transformer impedance. In most cases using special… (More)


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