FIELD: electrical engineering. SUBSTANCE: device has primary winding, secondary high-voltage winding and after-burning winding located on first leg of magnetic core of test-and-burning-through transformer, full-wave rectifier, high-voltage rectifier and resistor, ignition winding on second leg of test-and-burning-through transformer and high-voltage change-over switch which control winding is connected to power supply source through contacts of pickups of current and voltage of primary winding of transformer connected in series. EFFECT: improved efficiency in location of insulation faults in cable lines. 1 dwg
