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LIST OF FIGURES
1. Westinghouse DB-50 breaker removed from its enclosure and ready for conversion. ................................... 5
2. Removal of the load-side draw-out fingers from a DB-25 breaker. ................................................................. 5
3. Trip unit mounting bolts to be removed from a DB-50. .................................................................................... 5
4. Trip unit mounting bolts to be removed from a DB-25. .................................................................................... 6
5. Electromechanical trip devices removed from the breaker.............................................................................. 6
6. DB-50 back frame with the electromechanical trip devices removed and ready for conversion. .................... 7
7.
Assembling
a
CT to the bus. ............................................................................................................................ 8
8. CT assembly for a DB-50 breaker.................................................................................................................... 8
9. CT assembly for a DB-25 breaker.................................................................................................................... 8
10. CT alignment dowels installed on a DB-25 breaker......................................................................................... 9
11. Placing a CT into position on a DB-50 breaker................................................................................................ 9
12. CT bolts inserted into a DB-50 breaker back frame......................................................................................... 9
13. CT bolts inserted into a DB-25 breaker back frame......................................................................................... 9
14. CT assemblies installed into the breaker. ...................................................................................................... 10
15. Tightening the CT assembly mounting bolts. on the rear of the breaker. ...................................................... 10
16. Tightening the CT assembly bolts.................................................................................................................. 10
17. Installing the trip paddle onto the trip bar. ...................................................................................................... 11
18. Installing the reset sleeve onto the cross bar of a DB-25 breaker. ................................................................ 11
19. Trip unit mounting bracket assembly. ............................................................................................................ 12
20. Trip unit bracket installation. .......................................................................................................................... 12
21. DB-25 flux shifter reset arm installed on the cross bar. ................................................................................. 12
22. DB-25 spring clamp installed on the breaker frame....................................................................................... 13
23. Drilling the flux shifter support bracket mounting hole. .................................................................................. 13
24. Installed flux shifter and trip unit mounting assembly (DB-50)....................................................................... 13
25.
Adjusting
the flux shifter. ................................................................................................................................ 14
26. Wiring harness installed on the CTs. ............................................................................................................. 14
27. Trip unit attached to its mounting plate. ......................................................................................................... 15
28. Harness connector attached to the trip unit. .................................................................................................. 15
29. Trip unit mounted on the breaker. .................................................................................................................. 15
30. Neutral sensor outline for a DB-25 breaker ................................................................................................... 16
31. Neutral sensor outline for a DB-50 breaker. .................................................................................................. 17
32. Cabling diagram for ProTrip™ trip units with ground fault on four-wire loads ............................................... 20
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