861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11
201/214
Operation
40
Cable testing
40.1
Safety instructions
40.2
Test voltage
Two possibilities for cable testing are described hereafter.
Test voltages
DANGER
Life-endangering high voltage
Can cause death, serious injury and property damage. DC voltage applied to the cable
and overvoltages at the busbar can cause flashover.
➭ Keep safety distances.
➭ Install barriers.
➭ Switch on warnings.
DANGER
High voltage and explosion hazard
If the voltage transformer is energized, or if it is of the non-disconnectable type,
the test voltage can destroy the voltage transformer and cause personal injuries.
➭ Switch disconnectable voltage transformers to EARTHED position before testing the cables,
and secure them.
➭ Remove non-disconnectable voltage transformers.
NOTICE
Voltage indicators may be damaged by test voltage during cable tests.
May cause property damage.
➭ Short-circuit the voltage indicators with short-circuit plugs at the earthing points of
the test sockets.
Rated voltage of the
switchgear [kV]
DC test voltage
AC test voltage VLF
1
0.1 Hz
1
Very low frequency
Maximum value
[kV]
Test duration
[min]
Maximum value
[kV]
Test duration
[min]
7.2
22
15
11
60
12
38
15
19
60
15
52
15
28
60
17.5
52
15
28
60
24
72
15
38
60
25
72
15
38
60
36
72
15
57
60
38.5
72
15
57
60
40.5
72
15
57
60
CAUTION
Can cause injury or property damage.
Before starting the cable test, the suitability of the cables must be verified regarding
the selected test voltage.
➭ If a test duration different from the duration stated above is applied, please contact
the regional Siemens representative.
