ABB ACS550-01 User Manual page 232

232
380...480 Volt Drives
Type Code
ACS550-
01/U1-
see below
Three-phase supply voltage, 380...480 V
-03A3-4
-04A1-4
-05A4-4
-06A9-4
-08A8-4
-012A-4
-015A-4
-023A-4
1. Resistor time constant specification must be > 85 seconds.
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.
Symbols
R
MIN
R
MAX
P
rx –
ON
MAX
Installing and Wiring Resistors
All resistors must be installed outside the drive module in a place where they can
dissipate heat.
Warning! The surface temperature of the resistor is very high and air flowing
from the resistor is very hot. Materials near the brake resistor must be non-
flammable. Provide protection from accidental contact with the resistor.
To ensure that the input fuses protect the resistor cable, use resistor cables with the
same rating as used for the power input to the drive.
The maximum length of the resistor cable(s) is 10 m (33 ft). See the "Power
Connection Diagrams" on page 15 for the resistor cable connection points.
Technical Data
Resistance
< 3 s ON
R R
MAX MIN
> 27 s OFF
< 10% Duty
Ohm Ohm
641 120 65
470 120 90
320 120 125
235 80 170
192 80 210
128 80 315
94 63 425
64 63 625
– Minimum allowed braking resistor.
– Maximum resistance allowed if maximum braking torque is necessary.
Duty-cycle based resistor power rating in deceleration braking, where "x" is
time.
1
Resistor Minimum Continuous Power Rating
Deceleration-to-Zero Rating
P P
r3 r10
< 10 s ON < 30 s ON
> 50 s OFF > 180 s OFF
< 17% Duty < 14% Duty
W W
120 175
160 235
235 345
320 470
400 575
590 860
800 1175
1175 1725
ACS550 User's Manual
P P Continuous ON
r30 r60
> 60 s ON
< 60 s ON
> 180 s OFF
> 25% Duty
< 25% Duty
W W
285 1100
390 1500
570 2200
775 3000
950 4000
1425 5500
1950 7500
2850 11000
P
rcont
W