Operating Instructions – Electronic Motor DRC.-..-DAC
211
13
Braking resistors
Technical Data and Dimension Sheets
13.2.3 4Q operation with integrated brake coil and integrated braking resistor
• 4Q operation with integrated braking resistor is recommended for applications in
which the level of regenerative energy is low.
• The resistor protects itself (reversible) against regenerative overload by changing
abruptly to high resistance and no longer consuming any more energy. The inverter
then trips with overvoltage error.
• If the amount of regenerated energy is too high for the application, you can use an
external braking resistor as an alternative.
BY1C brake coil
and integrated
BW1 braking resis-
tor (DRC1)
Regenerative load capacity for a brake ramp of 10 s
The following figure shows the permitted regenerative energy load of the BY1C brake
coil in combination with the integrated BW1 braking resistor for a brake ramp of 10 s:
4860848651
c/h = cycles per hour
0
1000
2000
3000
4000
5000
6000
7000
8000
1
10
100
1000
10000
[J]
[c/h]
9000
BY1C+BW1
P
i
f
kVA
Hz
n