S-50 DC
● S-80 DC ● S-110 DC ● S-120 DC – USER MANUAL
16
4.2.3
Ending testing
Once testing is complete, turn the voltage down and switch the equipment off ("HV Off"
).
When the test voltage has dropped by about 10%, discharge the test object by holding the ground and
discharge rod against the high-voltage terminal of the high-voltage unit.
WARNING
Make absolutely sure that the ground and discharge rod is grounded properly.
Only capacitances of less than 6 µF may be discharged, in which case the cool-
ing time for the discharge rod is approx. 30 minutes.
The discharge process of the test object can be followed on the measuring instrument.
To short-circuit the connected test object, the middle hook of the grounding and discharge rod must be
attached to the high-voltage terminal of the high-voltage unit. The equipment can now be unplugged
from the mains.
Finally ground/short-circuit the test object itself.
4.2.4
Safety measures
The set must only be operated by electricians in accordance with EN 50110-1. It must only be operat-
ed in areas which have been secured and/or cordoned off and marked in accordance with EN 50191
and EN 50110-1 standards. In an emergency, the high voltage must be switched off by a second op-
erator pressing the red "HV Off" button, and the set must be discharged and short-circuited with the
discharge rod..
Never put equipment into operation in the following conditions:
high humidity,
condensing water vapour,
moisture settling the device and measured object.
Please also follow the safety instructions in
chapter 1
. Reliable grounding of the high-voltage unit, the
operating unit and the ground and discharge rod is always necessary in addition to adequate protec-
tion against electric shock.
WARNING
Make sure that the other end of the cable / cables is fenced before unintentional
contact by unauthorized persons.
Be aware that residual charges may still be present after discharge in the case of capacitive tests or
the voltage may be rebuilt. After completing the measurements, leave the wires and shield/return core
grounded.
WARNING
Parallel cables may also still be charged after testing.
Always check the oil level (oil level in the centre of the oil-level lens) before testing.
