All Brake Resistors And Brake Units Used In Ac Motor Drives - Delta VFD300C43S-HS User Manual

Chapter 7 Optional AccessoriesC2000-HS
The optional accessories listed in this chapter are available upon request. Installing additional
accessories to your drive substantially improves the drive's performance. Select accessories according to
your need or contact the local distributor for suggestions.

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
40 30 20.3 -
50 37 25.1 4045*1
100 75 50.8 4045*2
150 110 74.5 4110*1
215 160 108.3 4160*1 BR1K5W012*12
300 220 148.9 4110*2
475 355 240.3 4185*2 BR1K5W012*14
*1. Calculation for 125% braking 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 Chapter 7 "Brake Module and Brake Resistor" in application manual for "Operation Duration & ED" vs.
"Braking Current".
*3. For heat dissipation, a resistor of 400W or lower should be fixed to the frame and at a surface temperature below 250°C; a
resistor of 1000W and above should be fixed on a surface with temperature below 350°C.
*4.
Please refer to VFDB series Braking Module Instruction for more detail on braking resistor.
NOTE
1. Specification and appearance of brake resistors
1-1 Wirewound resistor: for 1000W and above. Refer to the following appearance of wirewound resistor
(Figure7-1) and its model and specification comparison table (Table 7-2) for details.
K
1
* 125% Braking Torque 10% ED
* 3 Braking Resistor series for
each Brake Unit
2 parallel,
BR1K0W016*4
2 series
2 parallel,
BR1K2W015*4
2 series
2 parallel,
BR1K2W015*4
2 series
5 parallel,
BR1K2W015*10
2 series
6 parallel,
2 series
5 parallel,
BR1K2W015*10
2 series
7 parallel,
2 series
H
L
Resistor value Total
spec. for each Braking
AC motor Drive Current [A]
4000W 16Ω 47.5
4800W 15Ω 50
9600W 7.5Ω 100
12000W 6Ω 126
18000W 4Ω 190
24000W 3Ω 252
42000W 1.7Ω 450
E
A
B
7-2
2
* Max. Braking Torque
Min. Max. Total Peak
Resistor Braking Power
Value [Ω] Current [A] [kW]
14.1 54 41.0
12.7 60 45.6
6.3 120 91.2
6.0 126 95.8
4.0 190 144.4
3.0 252 190.5
1.7 450 344.2
Table 7-1
Figure 7-1