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62 Electrical installation
Connection diagram – 2×D8D, 6-pulse, internal charging
The diagram shows 2×D8D modules in a 6-pulse connection with internal charging. In
this manual, internal charging stands for ABB charging kit inside the supply unit cubicle.
A
External installation (outside supply module
cubicle)
1
Medium voltage/low voltage switchboard
2
Supply transformer
3
Charging switchgear including disconnecting
device
4
Dedicated supply unit switchgear including:
• Disconnecting device
• Breaker/contactor
5
Overcurrent and short-circuit protection of
input cabling
Note: *) Use symmetrical supply cabling to ensure equal current sharing between parallel diode bridges.
Required minimum length of the cables is 5 meters. See section
**) Internal charging kit can be used with 525...690 V AC supply voltage only.
***) Breaker/contactor is mandatory with internal charging.
Ground the cable shield 360 degrees at the cable entry (recommendation). For grounding instructions,
see section
Connection procedure (page
Use a separate PE conductor in addition if the conductivity of the shield does not meet the requirement
for the PE conductor. See ACS880 liquid-cooled multidrive cabinets and modules electrical planning
instructions (3AXD50000048634 [English]).
For cable selection instructions, see
B
Supply unit cubicle
6
DC link
7
Supply modules
8
Internal charging kit. For the connections, see
Example circuit
9
AC fuses for protecting supply unit against
short circuit
10
360 degrees grounding
66).
Selecting the power cables (page
diagrams.
Input AC cabling (page
60).
60).
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