Eaton Magnum PXR - Page 3

3
User Manual MN013016EN
Effective July 2022
Magnum PXR and Power Defense SB low
voltage power circuit breakers user manual
EATON www.eaton.com
List of gures
Description Page
Figure 1. Family of Magnum PXR low voltage power circuit breakers (800–6000 A) ............................................................6
Figure 2. Typical Magnum PXR nameplate ............................................................................................6
Figure 3. Typical Magnum PXR and PD-SB designation example ...........................................................................8
Figure 4. Shipping clamps for drawout circuit breaker ...................................................................................9
Figure 5. Magnum circuit breaker with lifting yoke attached (Magnum DS shown) .............................................................9
Figure 6. One side of drawout circuit breaker properly seated on extension rail ..............................................................11
Figure 7. Cassette rejection interlock pin positioning/installation ..........................................................................11
Figure 8. REMOVE position .......................................................................................................12
Figure 9. DISCONNECT position ...................................................................................................12
Figure 10. TEST position .........................................................................................................13
Figure 11. CONNECT position .....................................................................................................13
Figure 12. Cassette label showing DISCONNECTED, TEST, and CONNECTED position of recessed cover .........................................14
Figure 13. Levering position indication ..............................................................................................14
Figure 14. Typical fixed Magnum PXR circuit breaker ...................................................................................15
Figure 15. Typical PXR drawout circuit breaker features (front and rear views) ...............................................................16
Figure 16. Typical PXR fixed circuit breaker features (front and rear views) ..................................................................16
Figure 17. Typical double-wide standard frame circuit breaker features (front and rear view) .....................................................17
Figure 18. Magnum PXR and PD-SB drawout circuit breaker front cover ...................................................................18
Figure 19. Typical Magnum and PD-SB construction (right side view) ......................................................................19
Figure 20. Features of Magnum and PD-SB moving conductor assembly ...................................................................19
Figure 21. Narrow frame (8-finger) moving conductor assembly ..........................................................................20
Figure 22. Standard frame (12-finger) moving conductor assembly ........................................................................20
Figure 23. General partial cross-sectional view (shown in
closed position) (not specific to any family/frame) .....................................................................................20
Figure 24. Typical electrically operated drawout MPS circuit breaker with front cover removed ..................................................21
Figure 25. Circuit breaker closing springs being manually charged (Magnum DS shown) .......................................................21
Figure 26. Electrical motor operator to charge closing spring .............................................................................22
Figure 27. Cross section of conductor and arc control system ............................................................................22
Figure 28. Integral arc runner viewed from top of arc chamber (arc chute removed, circuit breaker closed) ........................................22
Figure 29. Arc plate assembly .....................................................................................................23
Figure 30. Pictorial diagram of typical current sensing, processing, and tripping system .......................................................23
Figure 31. PXR 25 programmable trip unit installed in Magnum PXR circuit breaker ...........................................................24
Figure 32. Narrow frame current sensors shown with cover plate removed .................................................................25
Figure 33. Line and load-side voltage taps for PXR circuit breakers ........................................................................25
Figure 34. Through-the-window electrical accessories ..................................................................................26
Figure 35. Shunt trip with cutoff switch .............................................................................................26
Figure 36. Shunt trip switch installed ...............................................................................................26
Figure 37. Spring release with optional latch switch ....................................................................................27
Figure 38. Undervoltage release ...................................................................................................27
Figure 39. Shunt trip, spring release, and undervoltage release installed ...................................................................27
Figure 40. Auxiliary switch (Form C) ................................................................................................28
Figure 41. Mechanical trip indicator with associated overcurrent trip switch .................................................................28
Figure 42. Motor operator kit .....................................................................................................28
Figure 43. Motor operator installed in a standard frame circuit breaker .....................................................................29
Figure 44. Cover mounted key lock and operations counter ..............................................................................29
Figure 45. Cassette-mounted key lock ..............................................................................................29
Figure 46. OPEN–CLOSE pushbutton lockable cover plate (Magnum DS shown) .............................................................30
Figure 47. Typical safety shutters in CLOSED position ..................................................................................30
Figure 48. Typical safety shutters in OPEN position ....................................................................................30
Figure 49. Cell switch (drawout position indicator) unmounted ...........................................................................30
Figure 50. Cell switches mounted on cassette ........................................................................................30
Figure 51. Door escutcheon and gasket .............................................................................................31
Figure 52. IP55 waterproof cover (Magnum DS shown) .................................................................................31
Figure 53. Cassette-mounted two-way cable interlock (Magnum DS shown) ................................................................31
Figure 54. Secondary connector protective hood ......................................................................................32
Figure 55. Top view secondary connectors ...........................................................................................32
Figure 56. Typical cassette-mounted secondary wiring ..................................................................................33