Resistor Braking; Acsm1 Braking Power Ratings - ABB ACSM1 System Manual

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Resistor braking

ACSM1 drive modules have as standard a braking chopper. External braking
resistor can be connected to drive module. Braking chopper can then feed
the braking energy to the resistor to keep the DC link voltage below the trip
limit. It is also possible to have multiple active braking choppers in common
DC system with ACSM1 drive modules.

ACSM1 braking power ratings

When the braking chopper is enabled and a resistor connected, the chopper
will start conducting when the DC link voltage of the drive reaches 780 V.
The maximum braking power rating for each drive module is achieved at 840
V. Braking chopper data of ACSM1 drive modules is shown in the following
table.
ACSM1-04xx-
P
br,max
P
br,cont
R
br,min
Size Frame
02A5-4 A
03A0-4 A
04A0-4 A
05A0-4 A
07A0-4 A
09A5-4 B
012A-4 B
016A-4 B
024A-4 C
031A-4 C
040A-4 C
046A-4 C
060A-4 D
073A-4 D
090A-4 D
: Maximum braking power of the chopper. The chopper will
withstand this braking power for 1 second within every 10
seconds.
: The internal chopper will withstand this continuous braking
power. The braking is considered continuous if the braking time
exceeds 30 seconds.
: The minimum allowed resistance of the braking resistor used
with the braking chopper.
Pbr,cont Pbr,max
KW KW
0.9 5.5
1.3 5.5
1.8 5.5
2.6 5.5
2.6 5.5
4.8 7.9
6.6 14.6
9.0 14.6
13.2 30.7
18.0 30.7
22.2 43.9
26.4 43.9
26.4 43.9
26.4 43.9
26.4 43.9
Rbr,min
Ohm
120
120
120
120
120
80
40
40
20
20
13
13
13
13
13