Commissioning
21
3.1.2 Connection via VLF CR Test Boost (Optional)
If the VLF SIN-45 test system is connected to the test object via the optional VLF CR
Test Boost, tests with cosine rectangular voltage can be carried out
(all other
operating modes are disabled).
By means of the VLF CR Test Boost the maximum testable load capacitance at 40 kV
and 0.1 Hz is increased to 5 µF. This way, standard-compliant tests of loads with higher
capacitance and cables with a rated voltage >20 kV can be performed.
The following figure shows a simplified connection diagram of the VLF SIN-45 test
system with the VLF CR Test Boost:
Proceed as follows to connect the VLF SIN-45 test system to the test object:
Step Action
1
Place the VLF SIN-45 test system on top of the VLF CR Test Boost, as shown
in the figure.
2
Using the green/yellow earth cable, make a connection between the protective
earth connections ( und ) and a suitable point on the protective earth
system (station earth).
Make sure that the connecting points of the earth cable are not soiled and that
they provide good metallic contact.
3
Connect the control cable from the VLF CR Test Boost to the
corresponding socket of the VLF SIN-45 test system.
110 V to 230 V,
50/60 Hz
Station earth or other suitable
foundation earth electrode
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