High Voltage Tester - Isolated High Voltage Transformer, Adjustable A.c. High Voltage Supply , Automatic Tripping System And Safety Micro-switch For Enhanced Protection

Electric Strength of an Insulating Material is defined as the voltage at which breakdown occurs under the prescribed conditions of test, divided by the distance between the electrodes to which the voltage is applied.

The High Voltage Tester is designed to give an adjustable A. C. high voltage supply. The voltage is provided through an isolated secondary winding of a high voltage transformer. The primary of the transformer is fed a variable voltage through a variac. The voltmeter is directly calibrated to give the output voltage of the high voltage coil at no load.

The high voltage circuit has a tripping system, which automatically trips off the supply, if the current in this circuit exceeds the set value of the tripping current. The tripping current can be set at any desired value within the range of the equipment. A digital mili-ammeter and a digital voltmeter are provided to measure the tripping current and the applied voltage respectively.

A safety device is provided which enables the high voltage supply applied to the probes only on pressing the micro-switch on the probe and only when the actual value of the current is less than the limit of the set tripping current.