Braking Power Ratings; Single Braking Chopper - ABB ACS850 Application Manual

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Braking power ratings

When the braking chopper is enabled and a resistor is connected, the chopper starts
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. The braking chopper data of
the drive modules is shown in the following table.
ACS850
Type
03A0-5
03A6-5
04A8-5
06A0-5, 08A0-5
010A-5
014A-5
018A-5
025A-5
030A-5, 035A-5
044A-5, 050A-5
061A-5, 078A-5,
094A-5
103A-5
144A-5
166A-5
202A-5, 225A-5
260A-5
290A-5
430A-5
521A-5
602A-5
693A-5, 720A-5
P
br,max
P
br,cont
R
br,min

Single braking chopper

In this case, only one braking chopper of a drive module in the common DC system is
used. It is recommended to use the chopper of the drive module that has the highest
braking power ratings. The following conditions should be fulfilled:
P
•
gen
P
•
gen
If the conditions can not be fulfilled, either a drive module with higher P
selected (if feasible) or a multiple braking chopper configuration can be used.
Common DC configurations
P
br,cont
kW
0.9
1.3
1.8
2.6
4.5
6.6
8.5
10.5
12
17.5
36
67.5
75
112.5
135
160
200
300
234
210
170
: the maximum braking power of the chopper. The chopper withstands this
braking power for 1 second within every 10 seconds.
: the internal chopper withstands 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.
<
P
, ave br , cont
<
P
,max br ,max
P R
br,max br,min
kW ohm
5.5 120
5.5 120
5.5 120
5.5 120
7.9 80
14.6 40
14.6 40
30.7 20
30.7 20
43.9 13
43.9 13
8
6
4
4
4
2.7
2
1.8
1.35
1
ratings can be
br