C H A P T E R 1 4 - A T E D I T OR
AT5600 User Manual 98-119 issue 14 Page 359
14.6.33. VOC - Open Circuit Voltage
Open circuit voltage is measured by applying an AC test voltage to a selected
winding (usually a primary winding), and measuring the resulting voltage
produced on another winding.
You may program the test to use either the normal AC measurement, or a DC
measurement, which could be used, for example, when testing transformers fitted
with a rectifying diode.
If there are several windings to be tested, the program will execute more quickly if
the following points are observed:
Place all the open circuit voltage (VOC) tests consecutively at the same point in
the program.
Use the same energized winding, with the same test voltage and frequency for
each test.
If there is a magnetizing current (MAGI) test which has the same energized
winding and the same test voltage and frequency, place this immediately before
the first open circuit voltage test.
On selecting ‘VOC Open Circuit Voltage’ from the available tests window, the
following form-fill dialogue box will be displayed:
To program the test:
1. Enter the test voltage and test frequency.
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