Technical data

Vacuum circuit breakers
17
Figure 20: Type 38-3AH3 circuit breaker key components
1. Gearbox
2. Closing spring
3. Opening spring
4. Jack shaft
5. Auxiliary switch
6. MOC switch operator
7. Spring charging motor (behind limit
switches)
8. Push-to-close
9. Push-to-trip
10. Closed circuit breaker interlock
11. Trip-free interlock
12. Ground disconnect
13. Charged/discharged indicator
14. Open/closed indicator
15. Operations counter
16. Secondary disconnect
17. Close coil
18. Trip coil
19. Capacitor trip (optional)
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