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20 Operation principle and hardware description
Overview diagram – 1×D8D, 6-pulse, internal charging
￭
The diagram shows a supply unit with one D8D module and internal charging in a
6-pulse connection. In this manual, internal charging stands for ABB charging kit inside
the supply unit cubicle.
*)
Note:
Minimum length of the cables is 5 meters.
A
External installation (outside supply module cubicle)
B
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
• Overcurrent and short-circuit protection of input cabling
5
AC fuses for protecting supply unit against short circuit
6
Internal charging kit
7
Diode supply module
8
DC link
1)
Available through ABB or third party
2)
Available through ABB
2)
2)
1)
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