Delta Electronics Elevator Drive VFD-VL - Manual (Page 199)

Appendix B Accessories|
B-2 Revision Nov. 2008, VLE1, SW V1.03
B.1 All Brake Resistors & Brake Units Used in AC Motor Drives
Applicable
Motor
Voltage hp kW
Full Load
Torque
Nm
Resistor value spec
for each AC Motor
Drive
Brake Torque
10%ED
Min. Equivalent
Resistor Value for each
AC Motor Drive
7.5 5.5 3.111 2400W 16Ω 125 16Ω
10 7.5 4.148 3000W 12Ω 125 12Ω
15 11 6.186 4800W 9Ω 125 9Ω
20 15 8.248 4800W 6.8Ω 125 6.8Ω
25 18.5 10.281 6000W 6Ω 125 6Ω
30 22 12.338 9600W 5Ω 125 5Ω
40 30 16.497 6000W 5Ω 125 5Ω
230V Se
ries
50 37 20.6 9600W 4Ω 125 4Ω
7.5 5.5 3.111 500W 50Ω 125 50Ω
10 7.5 4.148 1000W 40Ω 125 40Ω
15 11 6.186 1000W 33Ω 125 33Ω
20 15 8.248 1500W 25Ω 125 25Ω
25 18.5 10.281 4800W 21Ω 125 21Ω
30 22 12.338 4800W 19Ω 125 19Ω
40 30 16.497 6000W 20Ω 125 20Ω
50 37 20.6 9600W 16Ω 125 16Ω
60 45 24.745 9600W 13.6Ω 125 13.6Ω
75 55 31.11 12000W 10Ω 125 10Ω
460V Se
ries
100 75 42.7 19200W 6.8Ω 125 6.8Ω
NOTE
1. Please select the recommended resistance value (Watt) and the duty-cycle value (ED%).
2. 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.
10 0%
T0
T1
Brak e Time
C yc le Time
ED% = T1 /T0 x10 0(%)
3. For safety consideration, install an overload relay between the brake unit and the brake resistor.
In conjunction with the magnetic contactor (MC) prior to the drive, it can perform complete
protection against abnormality. The purpose of installing the thermal overload relay is to protect