Rba Assemblies - Baldor 18H Series Installation & Operating Manual

Section 1
General Information
Dynamic Braking (DB) Hardware Continued

RBA Assemblies

MAXIMUM BRAKING TORQUE IN % OF MOTOR RATING
HP 20 25
200 90% 75%
to
150% 125
%
240
150% 150
%
380 150% 150
%
to to
150% 150
480
%
150% 150
%
550 150% 150
%
to to
150% 150
600
%
150% 150
%
MN718
An RBA Assembly includes a dynamic brake transistor and resistors completely
assembled and mounted in a NEMA 1 enclosure. The are designed for EO and MO
controls. Select the RBA based on the voltage rating of the control and the dynamic
brake watt capacity required. Use Table A-3 to select the RBA assembly. If more than
4,000 Watts of brake capacity is required, use a combination of RTA (DB transistor) and
RGA (DB resistor) assemblies. Refer to Section 3 "Optional Dynamic Brake Hardware"
for wiring diagram.
Table A-3 Dynamic Braking Assemblies (RBA)
30 40 50 60
60% 45% 36%
100% 75% 62%
150% 115 92%
%
120% 90% 72% 60%
120% 90% 72% 60%
150% 150 150 120
% % %
120% 90% 72% 60%
120% 90% 72% 60%
150% 150 150 120
% % %
75 100 150V 150
48% 36% 28%
48% 36% 28%
96% 72% 56% 48%
48% 36% 28%
48% 36% 28%
96% 72% 56%
Cont. Catalog
Watts Watts
200 250
600 RBA2-610
1800 RBA2-1806
4000 RBA2-4004
600 RBA4-620
1800 RBA4-1820
36% 29% 4000 RBA4-4010
600 RBA5-624
1800 RBA5-1824
4000 RBA5-4014
No. No
Appendix A-5