All Brake Resistors And Brake Units Used In Ac Motor Drives - Delta VFD007FP4EA-41 User Manual

Chapter 7 Optional Accessories |CFP2000 Series
The optional accessories listed in this chapter are available upon request. Installing additional
accessories to your drive would substantially improve the drive's performance. Please select an applicable
accessory according to your need or contact the local distributor for suggestion.

7-1 All Brake Resistors and Brake Units Used in AC Motor Drives

Applicable
Motor
Braking Brake
Torque Unit
HP kW
(kg-m)
4
* VFDB
1 0.7 0.5 -
2 1.5 1.0 -
3 2.2 1.5 -
5 3.7 2.5 -
5.5 4.0 2.7 -
7.5 5.5 3.7 -
10 7.5 5.1 -
15 11 7.5 -
20 15 10.2 -
25 18 12.2 -
30 22 14.9 -
40 30 20.3 -
50 37 25.1 4045*1
60 45 30.5 4045*1
75 55 37.2 4030*2
100 75 50.8 4045*2
125 90 60.9 4045*2
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 600℃.
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
BR080W750*1
BR080W750*1
BR200W360*1
BR300W250*1
BR400W150*1
BR1K0W075*1
BR1K0W075*1
BR1K0W075*1
BR1K5W043*1
BR1K0W016*2 2000W32Ω
BR1K0W016*2 2000W32Ω
BR1K5W013*2 3000W26Ω
BR1K0W016*4 4000W16Ω
BR1K2W015*4 4800W15Ω
BR1K5W013*4 6000W13Ω
BR1K0W5P1*4 8000W10.2Ω 8000W10.2Ω
BR1K2W015*4 9600W7.5Ω
Resistor value Total
spec. for each Braking
AC motor Drive Current (A)
80W750Ω 1
80W750Ω 1
200W360Ω 2.1
300W250Ω 3
400W150Ω 5.1
1000W75Ω 10.2
1000W75Ω 10.2
1000W75Ω 10.2
1500W43Ω 17.6
2000W32Ω 24
2000W32Ω 24
3000W26Ω 29
4000W16Ω 47.5
4800W15Ω 50
6000W13Ω 59
76
9600W7.5Ω 100
7-2
2
* Max. Brake Torque
Min. Max. Total Peak
Resistor Braking Power
Value (Ω) Current (A) (kW)
190.0 4
190.0 4
126.7 6
108.6 7
84.4 9
54.3 14 10.6
54.3 14 10.6
47.5 16 12.2
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
3.0
3.0
4.6
5.3
6.8