Supply connection detail – two D8D modules, 12-pulse connection, internal charging
22 Operation principle and hardware description
Overview diagram – 2×D8D, 12-pulse, internal charging
The diagram shows a supply unit with two D8D modules and internal charging in a 12-
pulse connection.
*
)
NOTE: Each module must have its own input AC cable with the minimum length of 5 meters. Use
symmetrical supply cabling to ensure equal current sharing between parallel diode bridges.
Cubicle No. Description Available through
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
-
B Supply module
cubicle
5. AC fuses for protecting supply unit against
short circuit
ABB or third party
6. Internal charging kit ABB
7. Diode supply modules ABB
8. DC link -
CS880-304LC A019_2xD8D 12p internal charg overview diagr.pd
Medium voltage / low voltage switchboard1
External installation outside drive cabinetA
Supply transformer2
Charging switchgear including:3
• Disconnecting device
Interlocked, dedicated supply switchgear including:4
• Disconnecting device
• Breaker/contactor
• Overcurrent and short-circuit protection of input cabling
Supply module cubicle of driveB
AC fuses for protecting supply unit against short circuit6
Internal charging kit (option +F272)7
Diode supply modules8
DC link9
*Each module must have its own input AC cable with a minimum length of 5 m (16.4 ft). Use symmetrical
supply cabling to ensure equal current sharing between parallel diode bridges.
30 Operation principle and hardware description
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