Connection diagram – 2×D8D, 12-pulse, internal charging
The diagram shows 2×D8D modules in a 12-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
Interlocked dedicated supply unit switchgear
including:
•
Disconnecting device
• Breaker/contactor
• 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
5
DC link
6
Supply modules
7
Internal charging kit. For the connections, see
Example circuit
8
AC fuses for protecting supply unit against
short circuit
9
360 degrees grounding. See section
the supply
66).
Selecting the power cables (page
Electrical installation 63
diagrams.
transformer.
Input AC cabling (page
60).
60).
11
Selecting