3-3
3. Preparations for a Test
Connect test object, Continued
For test current ranges of 1µA to 100mA. Test object is isolated!
Test configuration B
A current flowing off via earth is not registered by the current
measuring device and consequently not limited by the current
limiter to permissible values.
If, in this configuration, during a certain period of t>1min, a short or
a stationary arc occurs for example, the PGK may be damaged due
to exessive output current.
When short circuit bridge is removed
Never loosen test earth terminal
B
on PGK during testing!
When removing the cable from the test earth terminal
B
the test
object is no longer earth-connected. Warning, the cable might
carry High Voltage!
☞
If there is no surge diverter
Step Procedure for test configuration B
Connect protective earth clamp of PGK to earth.
If available: Remove short circuit bridge between
measuring earth terminal and protective earth terminal.
Connect surge diverter (90V) to measuring earth
terminal and test object.
Connect shielding of high voltage cable to protective
earth.
Connect high voltage lead to test object.
Plug in powercord of PGK.
Proceedings
1
2
3
4
U
DC
U
max
B
0
0
0
Protective earth
Protective earth Protective earth
Test object
Surge diverter
90V
Shielding of high voltage line
of PGK
High voltage line from PGK
Shielding
6
5
1
2
4
3
High voltage connecting clamp
with transient protection resistor
5
6
Measuring
earth
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