Transient Earth Voltage (TEV) inspection indicates a leakage to earth through voids or damage to the insulation. This method, detects and measures both surface and internal discharge activity within medium voltage equipment. Partial discharge activity causes insulation material to deteriorate and eventually leads to failure of the equipment.



The UltraTEV Plus+™ provides ultrasonic detection of PD activity as numerical decibel values AND as audible signals, which you can hear through the headphones provided, plus measurement of PD activity in the form of TEV (Transient Earth Voltage) effects, which you can view on screen as numerical values. It can be switched between one shot PD detection and alert mode, or continuous PD measurement mode.