56 ZX2 GAS-INSULATED MEDIUM VOLTAGE SWITCHGEAR
Connection to ground potential
by means of grounding screws
Grounding of terminals on the voltage trans-
former terminal board using grounding screws
Connections to ground potential can be estab-
lished by means of grounding screws on the ter-
minals of the terminal board. Fig. 3.3.7.6.2 illus-
trates this using the example of a voltage
transformer with one secondary winding.
—
Fig. 3.3.7.6.2:
Grounding of terminals
using grounding screws
Wiring the voltage transformers
The cables for wiring of the transformers are pre-
pared at the works and wired to the low voltage
compartment. Wire the transformers as follows.
Hazard warning
Wire the secondary terminals and the
grounding of the voltage transformers in
accordance with the circuit diagrams.
Check that all terminal screws including
the grounding screws are tightly
fastened.
terminal leads to potentially lethal high
voltage at the terminal when the voltage
transformer is in operation!
terminal is only permissible for test
purposes on voltage transformers with
de-energized primary!
Always use the original grounding
screws!
N
A
a
n
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