10
INSTALLATION, CONNECTION AND ENERGIZATION
Shielding
Transformer
Primary
VAS
VBS
VCS
VAD
VBD
VCD
U
V
W
PE
U
V
W
PE
PE
Inverter
Figure 10.10: Power and ground connections for 12 pulses topology
✓
NOTE!
If shielded cables are used between the transformer and the inverter, then connect the shield to the protective earth (PE) at
both extremes of the cables.
Minimum cable insulation voltage:
Table 10.8: Minimum insulation voltage of the power cables
Rated voltage [V] Minimum Insulation Voltage [V]
2300
3600 / 6000
3300
6000 / 10000
4160
6000 / 10000
6900
8700 / 15000
Commercial examples:
Belden: 37540.
Cofiban: Cofialt 7 kV (without shield).
Pirelli: Eprotenax 6/10 kV.
Ficap: Fibep or EPDry 6/10 kV.
Use proper terminations for the power connections as well as for the shield connections to the ground bar.
Tighten the connections with the appropriate torque.
Table 10.9: Power connections cable lugs and tightening torque
Identification
Column
Cable Lug
Torque [Nm] ±20 %
VAD
Rectifier M10
30
VBD
VCD
VAS
VBS
VCS
U
Inverter
M12
60
V
W
PE
Shields
Rectifier and Inverter M8
15
MVW01 | 10-15
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