TOS93 Series User’s Manual 109
Partial Discharge Test | Set test conditions
Description of test conditions
The following table shows the test conditions that you can set for partial discharge (PD) test.
Test condition Description See
Test voltage (Test Voltage/2nd Test Voltage ) Voltage applied to EUT.
p.110
Limit voltage Upper limit of voltage applied to EUT.
p.113
Step Voltage Voltage applied to EUT at the first step.
p.110
Voltage Pattern Voltage pattern applied to EUT.
p.110
Frequency Test voltage frequency.
p.113
Upper limit of electric charge (Upper Coulomb) Reference electric discharge for upper limit
judgment.
p.114
Reference upper limit of discharge count (Upper
Pulse Count)
Reference pulse count for upper limit judgment.
p.115
Threshold for discharge (Pulse Count Threshold) Threshold for electric charges to be counted as
pulse count.
p.116
Test time (Test Time/2nd Test Time) The length of time that the test voltage is applied.
p.110
Step time Time per step until Test Voltage is reached.
p.110
Voltage rise time (Rise Time) Time from when the START switch is pressed
until Test Voltage is reached.
p.110
Voltage fall time (Fall Time/2nd Fall Time) Time for the voltage to fall from the test voltage.
p.110
Measurement range (Range) Selects a measurement range.
p.117
Electric charge for detecting discharge inception
voltage (Inception Voltage)
Set the amount of electric charge that is the
reference for discharge inception.
p.118
Electric charge for detecting discharge extinction
voltage (Extinction Voltage)
Set the amount of electric charge that is the
reference for discharge extinction.
p.119
Band Pass Filter Selects a frequency band to be passed.
p.120
Low-pass filter Limits the noise that the AC power supply
generates.
p.121
Voltage Measure Voltage measurement mode. Select whether to
measure in true rms values or peak values.
p.122
Electric charge peak value display (Display
Peakhold)
Holds the maximum measured electric charge.
p.123
Electric charge calibration (Precalibration) Calibrates the electric discharge.
p.127
Graph scale setting (Graph Scale) The scale setting of a graph.
p.124
Display of discharge inception voltage/discharge
extinction voltage (Inc/Ext-Volt Marker)
Represents discharge inception voltage and
discharge extinction voltage on the graph after a
test.
p.125
Graph axis setting (Graph Format) Variables to be represented on the graph.
p.126
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