ABB ACS880-07CLC

Supply connection detail – two D8D modules, 12-pulse connection, external charging
and pre-magnetizing
24 Operation principle and hardware description
 Overview diagram – 2×D8D, 12-pulse, external charging and pre-
magnetizing
The diagram shows a supply unit with two D8D modules in a 12-pulse connection. The
system has an external charging circuit combined with a transformer pre-magnetization
circuit.
*
)
NOTE: Each module must have its own input AC cable with the minimum length of 5 meters.
Cubicle No. Description Available through
A External installation
(outside supply
module cubicle)
1. Medium voltage/low voltage switchboard -
2. Switchgear including:
• Disconnecting device
• Breaker/contactor
-
3. Combined transformer pre-magnetizing
circuit and drive charging circuit
-
4. Supply transformer -
5. Overcurrent and short-circuit protection of
input cabling
-
B Supply module
cubicle
6. AC fuses for protecting supply unit against
short circuit
ABB or third party
7. Diode supply modules ABB
8. DC link -

A
CS880-304LC A019_2xD8D 12p ext charg overview diagr.pd
f
Medium voltage / low voltage switchboard1
External installation outside drive cabinetA
Switchgear including:2
• Disconnecting device
• Breaker/contactor
Combined transformer pre-magnetizing circuit and drive charging circuit3
Supply transformer4
Overcurrent and short-circuit protection of input cabling5
Supply module cubicle of driveB
AC fuses for protecting supply unit against short circuit6
Diode supply modules7
DC link8
*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.
￭ 6-pulse, 12-pulse and 24-pulse connections
The figure below illustrates the difference between 6-pulse and 12-pulse AC supply
connections. 6-pulse connection is standard.
Some drive types are available as a 12-pulse version (option +A004), some as a 24-pulse
version (option +A006).
32 Operation principle and hardware description