ABB ACS850-04 series, Hardware Manual

Page: 159 / 164

Resistor braking
159
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 155 .
Brake resistor connection data
Voltage over the resistor during braking is 1.35 · 1.2 · 415 V DC when the supply
voltage is 380 to 415 VAC and 1.35 · 1.2 · 500 V DC when the supply voltage is 440
to 500 V AC.
SAFUR resistors
Degree of protection: IP00. The resistors are not UL listed.
Maximum resistor cable length
10 m (33 ft)
Drive module type Internal brake
chopper
Example brake resistors
P
brcont
(kW)
R
min
(ohm)
Type * R
(ohm)
E
R
(kJ)
P
Rcont
(kW)
380…500 V
ACS850-04-387A-5
250 2.0 2 × SAFUR125F500 2 7200 18
ACS850-04-500A-5 250 2.0 2 × SAFUR125F500 2 7200 18
ACS850-04-580A-5 315 1.3 2 × SAFUR200F500 1.35 10800 27
ACS850-04-650A-5 315 1.3 2 × SAFUR200F500 1.35 10800 27
ACS850-04-710A-5 400 0.7 3 × SAFUR200F500 0.90 16200 40
ACS850-04-807A-5 400 0.7 3 × SAFUR200F500 0.90 16200 40
ACS850-04-875A-5 400 0.7 3 × SAFUR200F500 0.90 16200 40
3AXD00000581898
P
brcont
The internal brake chopper will withstand this continuous braking power. The braking is
considered continuous if the braking time exceeds 30 seconds.
R
min
The minimum allowed resistance value of the brake resistor
R Resistance value for the resistor assembly.
E
R
Short energy pulse that the resistor assembly withstands every 400 seconds.
P
Rcont
Continuous power (heat) dissipation of the resistor when placed correctly.
* The resistors are connected in parallel.