Kikusui TOS9301 - Performing tests

328 User’s Manual TOS93 Series
Appendix | Example of partial discharge test
Performing tests
After pre-test inspection, perform the test by following the procedure below.
1
Set the following test conditions.
For the procedure to set test conditions, see “Set test conditions” (p.108).
2
Press START.
The test starts.
3
Press Test Level.
4
Use the rotary knob to gradually increase the voltage from 0 V.
5
When the partial discharge electric charge exceeds 10 pC while the voltage is being
increased, stop increasing the voltage, and read the voltage on the display.
This voltage is the start voltage. If the voltage exceeds the maximum application voltage and a
protection function is activated before the electric charge exceeds 10 pC, the test is successful.
6
Start increasing the voltage again. Increase the voltage to 10 % higher than the start
voltage.
7
Then, gradually decrease the voltage down to 0 V.
8
After finishing the test, press MEMORY > Result to check the discharge extinction
voltage.
The Extinction Voltage column in the test result list indicates discharge extinction voltage. If the
extinction voltage is Discharge extinction voltage limit
(p.326) or more, the test is successful.
Test condition Setting
Test Voltage 0 V
Limit Voltage
The voltage determined in “Maximum application voltage” (p.326).
Voltage Pattern RISE
Frequency 50 Hz
Upper Coulomb OFF
Upper Pulse Count OFF
Test Time OFF
Rise Time 0.1 s
Fall Time OFF
Range 100 pC
Inc/Ext-Volt Marker ON
Inception Voltage 10 pC (≤ 100.0 pC)
Extinction Voltage 10 pC (≤ 100.0 pC)