C H A P T E R 1 4 - A T E D I T OR
AT5600 User Manual 98-119 issue 14 Page 351
14.6.26. SURG - Surge Stress Test
WARNING:
Under no circumstances should the surge be applied to the input winding of a
step-up transformer because it may produce voltages greater than the 7KV
limit of the AT5600.
The purpose of this test is to detect an inter-turn short by applying a number of
high voltage impulses (or surges) to the selected winding.
Each impulse produces a sinusoidal transient which eventually decays to zero.
During the test, the tester measures the area (in Volt - seconds) under each
transient. The decay is much shorter in a faulty winding, and is detected as a
smaller value for the measured area.
On selecting ‘SURG Stress Test - Surge’ from the Available Tests window, the
following form-fill dialogue box will be displayed:
To program the test:
1. Enter the desired test voltage.
2. Enter either a nominal winding inductance or select AUTO mode.
When a fixed inductance is entered, the AT5600 uses this value to
estimate the frequency and duration of the transient waveform and thus
determine the digital waveform sampling rate that is used.
In AUTO mode, the tester automatically determines the ideal sample rate
and duration after testing the first sample in a batch. AUTO mode is
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