VOLTECH AT3600 USER MANUAL PROGRAMMING TESTS
TEST PROGRAM EDITOR VPN 98 - 024 PAGE 3.4.45.
4.27. SURG - SURGE STRESS TEST
WARNING
UNDER NO CIRCUMSTANCES SHOULD THE SURGE BE APPLIED TO
THE INPUT WINDING OF A STEP UP TRANSFORMER SUCH THAT ITS
OUTPUT IS BIGGER THAN 7KV
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 AT3600 uses this value to estimate the
frequency and duration of the transient waveform and thus determine the digital
waveform sampling rate that is used.
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