Phas - Interwinding Phase Test - Voltech AT5600 User Manual

C H A P T E R 7 – T E S T S
7.25. PHAS – Interwinding Phase Test
Where Used
This test is useful for most types of transformer,
although unusual with line frequency transformers and
tests for the phase angle between windings. It is most useful for determining the
phase effect of audio and telecommunications transformers when placed in a
transmission line.
Measurement Conditions
When programming the test enter the test frequency, choose the test voltage from
the following table.
When selecting your energized winding, check that your transformer does not
have a large step-up turns ratio between this winding and any other windings as
this may cause high voltages to be present during the test. Energize the winding
with the most turns if this is the case
Please also see
14.6.21 for specific advice on programming the test, and
10.2.25 for test accuracy specification
AT5600 User Manual 98-119 issue 14
A N D T E S T C O N D I T I O N S
Impedance of Energized Winding
→
1M
→
100k
→
10k
→
1k
→
100
→
10
→
1
→
100m
Test Voltage
5V
100k
5V
10k
5V
1k
3V
100
0.5V
10
100mV
1
10mV
100m
1mV
10m
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