ABB ACSM1-04 Series, Hardware Manual

Page: 84 / 92

Resistor braking
84
• The braking energy must not exceed the energy dissipation capacity of the
selected resistor
• It is highly recommended that the resistor be protected from thermal overload;
see the section Contactor protection of drive below.
Chopper data / Resistor selection table
The ratings apply at an ambient temperature of 40°C (104°F).
P
brcont
The internal chopper will withstand this continuous braking power. The braking is considered
continuous if the braking time exceeds 30 seconds.
P
brmax
Maximum braking power of the chopper. The chopper will withstand this braking power for 1
second within every 10 seconds.
Note: The listed resistors will withstand this braking power
for 1 second within every 120 seconds.
R
min
The minimum allowed resistance of the braking resistor.
R Resistance of the listed resistor.
P
n
Continuous power (heat) dissipation of the listed resistor when cooled naturally in a vertical
position.
E
pulse
Energy pulse the listed resistor will withstand.
Refer to page 90 for a dimension drawing of the resistor.
Drive type
ACSM1-04xx…
Internal braking chopper Example braking resistor
P
brcont
(kW)
P
brmax
(kW)
R
min
(ohm)
Type
R
(ohm)
P
n
(W)
E
pulse
(kJ)
-110A-4 40 75
4
JBR-09
(Danotherm CBT-H 560 GHT 415 4R0)
4 2200 540
-135A-4 55 100
-175A-4 65 120
-210A-4 80 150
PDM-425726