Resistor braking
141
Technical data
Ratings
The ratings for selecting the brake system components are given below at an
ambient temperature of 40 °C (104 °F). Check that the braking energy
transmitted to the specified resistor(s) in 400 seconds does not exceed E
R
.
See page 137.
Definitions
Combined braking cycles
•After P
br5
, P
br10
or P
br30
braking, the drive and the chopper will withstand P
brcont
continuously. P
brcont
is the only allowed braking power after P
br5
, P
br10
or P
br30
.
• P
br5
, P
br10
or P
br30
braking is allowed once every minute.
•After P
brcont
braking, there has to be a pause of at least 60 seconds without any
braking if the subsequent braking power is greater than P
brcont
.
Drive type
ACS850-04…
Frame
size
Braking power (drive + chopper) Brake resistor(s)
5/60 s
P
br5
(kW)
10/60 s
P
br10
(kW)
30/60 s
P
br30
(kW)
P
brcont
(kW)
Type R
(ohm)
E
R
(kJ)
P
Rcont
(kW)
-430A-5 G 300 300 300 300 2xSAFUR125F500 2.00 7200 18
-521A-5 G 375 375 375 234 2XSAFUR210F575 1.7 8400 21
-602A-5 G 480 480 470 210 2xSAFUR200F500 1.35 10800 27
-693A-5 G 600 400
2)
300 170 4xSAFUR125F500 1.00 14400 36
-720A-5 G 600
1)
400
2)
300 170 4xSAFUR125F500 1.00 14400 36
00581898
P
br5
Maximum braking power of the drive with the specified resistor(s). The drive and the chopper
will withstand this braking power for 5 seconds per minute.
P
br10
The drive and the chopper will withstand this braking power for 10 seconds per minute.
P
br30
The drive and the chopper will withstand this braking power for 30 seconds per minute.
P
brcont
The drive and the chopper will withstand this continuous braking power. The braking is
considered continuous if the braking time exceeds 30 s.
R Resistance value for the resistor assembly. Note: This is also the minimum allowed
resistance for the brake resistor.
E
R
Short energy pulse that the resistor assembly withstands every 400 seconds. This energy will
heat the resistor element from 40 °C (104 °F) to the maximum allowable temperature.
P
Rcont
Continuous power (heat) dissipation of the resistor when placed correctly. Energy E
R
dissipates in 400 seconds.
1)
630 kW possible if ambient temperature is below 33 °C (91 °F)
2)
450 kW possible if ambient temperature is below 33 °C (91 °F)
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