In between the primary of the HV Transformer and energizing networks a contactor and a protective circuit is incorporated as protective and controlling devices. The circuit has fast acting tripping characteristics which gives an ideal protective curve. The contactor acts as main switch and also interconnects safety devices such as door switches, control switches and other allied controls desired by customer.
The output voltage is measured by square front dial instrument. The marking on the dial are Kilovolts indicating the true applied voltage. The circuit is so arranged to have memory effect to breakdown voltage which facilitates the effective operation.
The test cells having dimensions within the limits prescribed by Indian Standards are supplied. The electrode assembly of test cell is strictly in accordance to specifications. The test cell is supported on cast resin transformer terminals and thus brings automatically test sample in HT circuit