The ClearTest™ Transformer Tester provides quick and easy tests of de-energized power distribution system transformers. It is a handheld device with a single pushbutton that provides a clear indication of open circuits, short circuits, including shorted turns or shorted windings and confirmation that the test results are OK.
The ClearTest is a completely new design that briefly energizes the transformer and takes a snapshot of the transformer condition by measuring the voltage, current and power factor of the test signal.
The ClearTest finds transformer defects that include:
A single shorted turn in the primary or secondary side of a transformer
Open coils or blown internal fuses or breakers
Partial shorts including shorted turns, shorted turn layers, coil to core shorts and primary to secondary shorts
Bad transformer ratios resulting from shorted turns
SHORT: Power factor ≤ 0.6
OPEN: Test current ≤ 80 microamps and power factor ≤ 0.03
OK: Power factor > 0.6