GE AF-650 GP Design Manual page 42
General purpose drive
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200-240 V
025-11 kW
15-37 kW
380-480 V
0.37-75 kW
90-160 kW
200-800 kW
525-600 V
PK75-P75K
525-690 V
90-400 kW
500-560 kW
630-1000 kW
Table 3.3: Braking at Heavy duty (HD) 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
GE 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
Braking duty cycle at 100% tor-
Cycle time (s)
120
300
120
600
600
120
600
600
600
AF-650 GP Design Guide
Braking duty cycle at over torque
que
(150/160%)
Continuous
10%
Continuous
Continuous
40%
Continuous
40%
1)
40%
40%
3
40%
10%
40%
10%
10%
40%
10%
2)
10%
10%
41
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