TeraOhm 5kV
25
Note:
- Maximum value for Step Time is 30 min.
Warning!
• Refer to Warnings chapter for safety precautions!
5.8. Withstanding voltage
This function offers Withstanding Voltage test of insulation material. It covers two types
of tests:
a) Breakdown voltage testing of high voltage device, e.g. transient suppressors and
b) DC withstanding voltage test for insulation coordination purposes.
Both functions require breakdown current detection. The test voltage increases step by
step from the Start up to the Stop value over a predefined time and it is kept at the Stop
value for a predefined test time, see the figure below.
Ut Ut
Ustop
Ub
Ustart Ustart
U
step
00
T
step
T
end
tt
Fig. 17. Test voltage presentation without breakdown (left part)
and with breakdown (right part)
Ut ........Test voltage
Ustop...End test voltage
Ustep...Voltage step approx. 20 V (fixed value - not presetable)
Ustart ..Initial test voltage
Tstep ...Test voltage duration per one step
Tend....Constant test voltage duration after reaching End value
t ...........Time
Ub .......Breakdown voltage
Selecting this function displays the following states (initial state and state with results
after completion of the measurement).
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