D.1 Dynamic Braking (Db) Hardware - Baldor VS1GV21-1B Installation & Operating Manual

D.1 Dynamic Braking (DB) Hardware

Whenever a motor is abruptly stopped or forced to slow down quicker than if allowed to coast to a stop, the motor becomes
a generator. This energy appears on the DC Bus of the control and must be dissipated using dynamic braking hardware.
Dynamic braking resistors are completely assembled and mounted in a NEMA 1 enclosure. A listing of available RGA
assemblies is provided in Table D-1. Select the braking resistor that has correct ohm value for the control and adequate
continuous watts capacity to meet load requirements.
Input
HP
Volts
1-7.5
10-20
230
25-40
50-60
1-3
5-10
15-25
460
30-50
60-125
150-500
1-3
5-10
15-25
575
30
40-125
150-300
*Note: Total Ohms column indicates the minimum resistance that the output transistors can drive. For example, if the Total
Ohms column indicates 6 ohms and a 6 ohm resistor is unavailable, an 8 ohm can be used but not a 4 ohm resistor.
MN765
Table D-1 Dynamic Braking Resistor Assemblies (RGA)
Total*
Ohms
600 1200
20 RGA620 RGA1220
6 RGA1206
4 RGA1204
2
120 RGA6120 RGA12120 RGA24120
60 RGA660 RGA1260
20 RGA620 RGA1220
10 RGA1210
4 RGA1204
2
120 RGA6120 RGA12120 RGA24120
60 RGA660 RGA1260
30 RGA630 RGA1230
24 RGA1224
14
4
Appendix D
Continuous Rated Watts
2400 4800
RGA2420
RGA2406 RGA4806
RGA2404 RGA4804
RGA4802 RGA6402
RGA2460 RGA4860
RGA2420 RGA4820
RGA2410 RGA4810
RGA2404 RGA4804 RGA6404
RGA4802 RGA6402
RGA2460 RGA4860
RGA2430 RGA4830
RGA2424 RGA4824
RGA4814 RGA6414
RGA4804 RGA6404
Options and Kits
6400 9600 14200
RGA9602 RGA14202
RGA9604 RGA14204
RGA9602 RGA14202
RGA9604 RGA14204
Options and Kits D-1