Delta CT2000 Series User Manual page 55

Chapter 7 Optional Accessories CT2000 Series
7-1 All Brake Resistors and Brake Units Used in AC Motor Drives
460V
Applicable
Motor
Braking Brake
Torque Unit
HP kW
(kg-m)
4
* VFDB
15 11 7.5 -
20 15 10.2 -
25 18 12.2 -
30 22 14.9 -
40 30 20.3 -
50 40 25.1 4045*1 BR1K2W015*4
60 45 30.5 4045*1 BR1K5W013*4
37.2 4030*2 BR1K0W5P1*4
75 55
50.8 4045*2
100 75
125 90 60.9 4045*2 BR1K5W013*4
1
*
Calculation for 125% brake toque: (kw)*125%*0.8; where 0.8 is motor efficiency.
Because there is a resistor limit of power consumption, the longest operation time for 10%ED is 10sec (on: 10sec/ off:
90sec).
2
*
Please refer to the Brake Performance Curve for "Operation Duration & ED" vs. "Braking Current".
3
*
For heat dissipation, a resistor of 400W or lower should be fixed to the frame and maintain the surface temperature below
50℃; a resistor of 1000W and above should maintain the surface temperature below 350 .
4
*
Please refer to VFDB series Braking Module Instruction for more detail on braking resistor.
NOTE
1. Definition for Brake Usage ED%
Explanation: The definition of the brake usage ED (%) is for assurance of enough time for the brake
unit and brake resistor to dissipate away heat generated by braking. When the brake resistor heats
up, the resistance would increase with temperature, and brake torque would decrease accordingly.
Recommended cycle time is one minute.
For safety concern, install an overload relay (O.L) between the brake unit and the brake resistor
in conjunction with the magnetic contactor (MC) prior to the drive for abnormal protection. The
purpose of installing the thermal overload relay is to protect the brake resistor from damage due to
frequent brake, or due to brake unit keeping operating resulted from unusual high input voltage.
Under such circumstance, just turn off the power to prevent damaging the brake resistor.
1
* 125%Braking Torque 10%ED
3
* Braking Resistor series for
each Brake Unit
BR1K5W043*1
BR1K0W016*2 2 series
BR1K0W016*2 2 series
BR1K5W013*2 2 series
2 parallel,
BR1K0W016*4
2 series
2 parallel,
2 series
2 parallel,
2 series
4 parallel 8000W10.2Ω
2 parallel,
BR1K2W015*4
2 series
2 parallel,
2 series
Resistor
Total
value spec.
Braking
for each AC
Current (A)
motor Drive
1500W43Ω 17.6
2000W32Ω 24
2000W32Ω 24
3000W26Ω 29
4000W16Ω 47.5
4800W15Ω 50
6000W13Ω 59
76
9600W7.5Ω 100
12000W6.5Ω 117
7-2
2
* Max. Brake Torque
Min. Max. Total Peak
Resistor Braking Power
Value (Ω) Current (A) (kW)
42.2 18 13.7
26.2 29 22.0
23.0 33 25.1
23.0 33 25.1
14.1 54 41.0
12.7 60 45.6
12.7 60 45.6
9.5 80 60.8
6.3 120 91.2
6.3 120 91.2
℃