3. INSTALLATION OF THE SWITCHGEAR AT SITE 59
Hazard warning
Finally, check the grounding system of
the voltage transformer wiring in
accordance with table 3.3.7.6.2.
Windings Terminals
Number Tap
open delta
winding
1 N a n
1
●
N a n da
dn
1
●
N a1 a2 n
1
● ●
N a1 a2 n da
dn
2 N 1a 1n 2a 2n
2
● (
1
)
1a 1n 2a 2n da
dn
2
● (
1
)
1a1 1a2 1n 2a1 2a2 2n
—
N
The terminal must be grounded via the grounding screw!
n
Grounding of the terminal in accordance with the circuit diagram!
dn
Grounding screw fitted in accordance with the circuit diagram and
fig. 3.3.7.6.5 or 3.3.7.6.6!
1) When 2 windings plus a tap or two windings plus open
delta winding, are used, "N" is implemented by the
works at the base plate of the voltage transformer.
Checking the wiring
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