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Cycle time (s)
Braking duty cycle at 100%
torque
Braking duty cycle at over torque
(150/160%)
200–240 V
PK25-P11K
120
Continuous
40%
P15K-P37K
300
10%
10%
380–500 V
PK37-P75K
120
Continuous
40%
P90K-P160
600
Continuous
10%
P200-P800
600
40%
10%
525–600 V
PK75-P75K
120
Continuous
40%
525–690 V
P37K-P400
600
40%
10%
P500-P560
600
40%
1)
10%
2)
P630-P1M0
600
40%
10%
Table 3.3: Braking at High overload torque level
1) 675 hp [500 kW] at 86% braking torque
750 hp [560 kW] at 76% braking torque
2) 675 hp [500 kW] at 130% braking torque
750 hp [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 braking energy
for 10% of the cycle time. The remaining 90% of the cycle time will be used on dissipating excess heat.
NOTE!
Make sure the resistor is designed to handle the required braking time.
FC 300 Design Guide
3 Introduction to AutomationDrive FC 300
MG.33.BC.22 - VLT
®
is a registered Danfoss trademark
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