Single Phase Transformer Test - NDB Technologies NDB-DOC-3 User Manual

6.2 Single phase transformer test

Use the NDB-DOC-3 on de-energized transformers only.
1. Press the power button
2. Connect the test lead to the instrument.
3. Press the winding type selection button
4. Press the kVA arrows to select the transformer size.
5. Press the kV arrows to select the transformer's primary winding nominal
voltage.
6. Connect the H1 clamp to the transformer's H1 terminal.
7. Connect the neutral/GND clamp to the transformer's neutral (or ground
or H0).
8. Press the start button
Tip: The secondary leads can stay connected to the transformer
while testing. The secondary leads and load do not alter the test result.
N D B - D O C - 3
to turn on the instrument.
.
H1
GND
- U s e r M a n u a l
to select Single.
Cutout switch must be open.
The power transformer must
be de-energized.
H1
X1
N
X2
N/GND/H0
8
Load