INSPECTION OF LOADED POWER FOR VOLTAGE NON-LINEAR RESISTOR

PURPOSE:To achieve a selection to satisfy a guarantee value by prescribing an amount of energy and a current waveform in a square wave impulse current test to prevent internal deterioration in a voltage non-linear resistor. CONSTITUTION:When making a selection to determine whether a voltage non- linear resistor mainly composed of zinc oxide meets a guarantee value or not, first a limit guarantee value in a square wave impulse current test is converted into energy. Then, a square wave impulse having energy equivalent to 110-160% as much as the energy converted is applied to the voltage non-linear resistor in a current waveform exceeding by 0.5ms. This test is performed twice: those resistors broken and having an abnormal waveform are screened out as reject. Thus, the energy and the current waveform are prescribed, thereby enabling selection to satisfy the guarantee value without internal deterioration in resistors.