Danfoss FC 300 Design Manual page 44

3 Introduction to AutomationDrive FC 300
3
200-240 V
PK25-P11K
P15K-P37K
380-500 V
PK37-P75K
P90K-P160
P200-P800
525-600 V
PK75-P75K
525-690 V
P37K-P400
P500-P560
P630-P1M0
Table 3.3: Braking at High overload torque level
1) 500 kW at 86% braking torque
560 kW at 76% braking torque
2) 500 kW at 130% braking torque
560 kW at 115% braking torque
Danfoss offers brake resistors with duty cycle of 5%, 10% and 40%. If a 10% duty cycle is applied, the brake resistors are able to absorb brake power
for 10% of the cycle time. The remaining 90% of the cycle time will be used on dissipating excess heat.
NB!
Make sure the resistor is designed to handle the required braking time
44
Braking duty cycle at 100%
Cycle time (s)
120
300
120
600
600
120
600
600
600
MG.33.BC.02 - VLT ® is a registered Danfoss trademark
Braking duty cycle at over torque
torque (150/160%)
Continuous
10%
Continuous
Continuous
40%
Continuous
40%
40% 1)
40%
FC 300 Design Guide
40%
10%
40%
10%
10%
40%
10%
10% 2)
10%