168
Operating Instructions – Electronic Motor DRC.-..-SNI
12
Braking resistors
Technical Data and Dimension Sheets
12.3.3 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
resistor (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
110
100 1000 10000
[J]
[c/h]
9000
BY1C+BW1
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