Vacuum Circuit Breaker Operator Module
Table of Illustrations
Figures
and Manual Charging of Closing Spring ............. 5
Pole Assembly ..................................................... 8
Figure 7a-b Operating Mechanism Section Diagram .............. 12
Figure 7c-d Operating Mechanism Section Diagram .............. 13
Figure 8
Operator Sequential Operation Diagram ............ 14
Figure 9a-b Use of Manual Spring Charging Crank ................ 15
Figure 10Typical Elementary Diagram ..................................... 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 17Typica1Vacuum Interrupter Contact Life Curves ....... 24
Figure 18 Circuit Breaker Pole AssemblyNacuum Check
Mechanical/Contact Resistance Test ................ 26
Figure 20 Technique for Tightening Vacuum Interrupter
Terminal Clamp Hardware ................................. 30
Tables
Table 2
Maintenance and Lubrication Intervals
(ANSI C37.06) .................................................... 20
Table 7
Vacuum Interrupter Stroke ............................... 32
Table 8
Troubleshooting .............................................. 33-34
Appendix
Table A-1 a 3AH Circuit Breaker Ratings
(Historic "Constant MVff Rating Basis) ..................... 35
Table A-1 b 3AH Circuit Breaker Ratings
(New "Constant kA" Rating Basis) .............................. 36
18
Table A-2 3AH Circuit Breaker Ratings ................................... 37
2