Voltech AT3600 User Manual page 143

V AT3600 U
OLTECH SER
4.21. PHAS – I
The interwinding phase may be tested between one winding and another. A test
source voltage is applied to one winding, and the voltages across two other windings
(one of which may be the driven winding) are measured. The interwinding phase is
measured by finding the phase difference between the voltages measured on the
primary and secondary windings.
This test is suitable for most types of transformers although unusual with line
frequency transformers, it tests the windings for the correct phasing. It is most useful
for determining the effect of audio and telecommunications transformers when placed
in a transmission line.
On selecting "PHAS Interwinding Phase" from the 'available tests' window, the
following dialog box is displayed:
To program the test:
1. Enter the value of voltage for the signal and the required frequency of the test. (If
2. Select the integration time required. 'Medium' is the default setting. 'Long' will
T P E
EST ROGRAM DITOR
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ANUAL
in doubt, refer to Chapter 7 - 'Test Conditions', which lists recommended test
conditions.)
Note also that the Measure button may be used here as outlined in section 3.9.
give more stable readings (for tighter limits) at the expense of an increased test
time, and 'Short' will test at the maximum speed, but may give a slightly noisier
reading.
NTERWINDING
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ROGRAMMING
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P 3.4.37.
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