Appendix: Resistor braking 391
WARNING! Never use a brake resistor with a resistance below the minimum
value specified for the particular drive. The drive and the internal chopper are
not able to handle the overcurrent caused by the low resistance.
Selecting the brake resistor cables
Use a shielded cable with the conductor size specified in section Power cable sizes
and fuses on page 361. The maximum length of the resistor cable(s) is 5 m (16 ft).
3-phase U
N
= 380…480 V (380, 400, 415, 440, 460, 480 V)
03x-01A2-4 200 1180 0.37 0.5 90
03x-01A9-4 175 800 0.55 0.75 90
03x-02A4-4 165 590 0.75 1 60
03x-03A3-4 150 400 1.1 1.5 37
03x-04A1-4 130 300 1.5 2 27
03x-05A6-4 100 200 2.2 3 17
03x-07A3-4 70 150 3.0 4 29
03x-08A8-4 70 110 4.0 5 20
03x-12A5-4 40 80 5.5 7.5 15
03x-15A6-4 40 60 7.5 10 10
03x-23A1-4 30 40 11 15 10
03x-31A0-4 16 29 15 20 16
03x-38A0-4 13 23 18.5 25 13
03x-44A0-4 13 19 22.0 30 10
1)
E = EMC filter connected (metal EMC filter screw installed),
U = EMC filter disconnected (plastic EMC filter screw installed), US
parametrization.
2)
Braking time = maximum allowed braking time in seconds at P
BRmax
every
120 seconds, at 40 °C ambient temperature.
00353783.xls J
Symbols
R
min
= minimum allowed brake resistor that can be connected to the brake chopper
R
max
= maximum allowed brake resistor that allows P
BRmax
P
BRmax
= maximum braking capacity of the drive, must exceed the desired braking power.
Ratings by resistor type CBR-V CBR-V CBR-V CBR-V CBR-V CBT-H
160 210 260 460 660 560
Nominal power (W) 280 360 450 790 1130 2200
Resistance (ohm) 70 200 40 80 33 18
Type R
min
R
max
P
BRmax
Selection table by resistor type
ACS355- CBR-V / CBT-H
Braking time
2)
x = E/U
1)
ohm ohm kW hp 160 210 260 460 660 560 s
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