ABB ACS800-37-0170-3 - Brake Choppers - Technical Data; Brake Resistors - Technical Data

Resistor braking
221
Brake choppers – Technical data
The following table contains the technical data for the NBRA-6xx brake choppers.
Brake resistors – Technical data
The following table contains the technical data for the resistors supplied by ABB.
U
N
Chopper
type
P
brmax
(kW)
P
cont
(kW)
I
max
(A)
I
rms
(A)
R
(ohm)
Duty cycle
(10/60 s)
Duty cycle
(1/5 min)
U
br_on
(V)
U
br_off
(V)
Airflow
(m
3
/h)
P
br
(kW)
I
rms
(A)
P
br
(kW)
I
rms
(A)
400 V
NBRA-658 230 70 384 109 1.7 230 355 230 355
674 660
660
NBRA-659 353 96 545 149 1.2 353 545 303 468
500 V
NBRA-658 268 81 380 101 2.15 268 331 268 331
811 795
NBRA-659 403 109 571 136 1.43 403 498 317 391
690 V NBRA-669 404 119 414 107 2.72 404 361 298 267 1120 1096
U
N
= Nominal voltage
P
brmax
= Maximum short-term (1 min every 10 mins) braking power
P
cont
= Maximum continuous braking power
I
max
= Maximum peak current
I
rms
= Corresponding RMS current
R = Recommended resistance
P
br
= Braking power for the specified duty cycle. Note: This value may be limited by P
brmax
.
U
br_on
= DC voltage at which chopper starts conducting
U
br_off
= DC voltage at which chopper stops conducting
Airflow = Airflow required for cooling of chopper
Type
U
N
(V)
R
(ohm)
E
R
(kJ)
P
Rcont
(kW)
Airflow
(m
3
/h)
SAFUR125F500 500 4.0 3600 9.0
1000
SAFUR210F575 575 3.4 4200 10.5
SAFUR200F500 500 2.7 5400 13.5
SAFUR180F460 460 2.4 6000 15.0
U
N
= Nominal voltage
R = Resistance
E
R
= Short energy pulse that the resistor assembly will withstand each 400 seconds
P
Rcont
= Continuous power (heat) dissipation of the resistor when placed correctly. Energy E
R
dissipates in 400 seconds.
Airflow = Airflow required for cooling of one resistor