Eaton NRX Series

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Instructional Book MN01301003E

Effective July 2011

Series NRX Low Voltage Power (Air)

Circuit Breakers User Manual

EATON CORPORATION www.eaton.com

1.06 (27)

.57 (14,5)

.98 (25)

Ø.44 (Ø11.2)

1.02 (26)

5.65 (143.5)

5.20 (132)

6.06 (153,9)

4.72 (119,9)

3X OPTIONAL BARRIERS

4.53 (115)

OPTIONAL BARRIER

4.53 (115)

2X 3.94 (100)

2X 4.62 (117,5)

BUSC

5.91 (150)

2.48 (62,9)

.79 (20)

Figure 45. Four-Pole Drawout Cassette—Top/Side Views with 4000A Horizontal Bus Adapters in Inches (mm)

Main Page

Table of Contents2
Contents2
List of Figures2
List of Tables3
Section 1: Introduction4
Figure 1. Series NRX Nameplate Location5
Figure 2. Series NRX Catalog Numbering System6
Figure2A. Series NRX Type RF-Frame Cassette Catalog Numbering System8
Figure 3. Typical NRX Drawout Circuit Breaker9
Figure 4. Typical NRX Drawout Cassette10
Figure 5. Typical NRX Fixed Circuit Breaker11
Figure 6. Typical NRX Drawout Circuit Breaker Front Cover12
Section 2: Receiving, Unpacking, and Inspection13
Table 1. Transport Indicator13
Table 2. Suggested Lifting Procedures and Precautions14
Table 3. Approximate Weights15
Figure 7 . Step15
Figure 8. Step15
Section 3: Breaker General Operation16
Figure 11. Step 216
Figure 12. Step 316
Figure 13. Step 417
Figure 14. WITHDRAWN Position17
Figure 15. DISCONNECT Position17
Figure 16. TEST Position18
Figure 17. CONNECT Position18
Figure 19. Step 319
Figure 20. Step 419
Figure 21. Step 119
Figure 22. Step 220
Figure 23. Step 320
Figure 24. Step 320
Figure 25. Installed Digitrip 520 Trip Unit21
Section 4: Circuit Breaker Features and Accessories21
Table 4. Series NRX Digitrip Trip Units21
Figure 26. Secondary Point Identifications22
Figure 27. Secondary Terminal Blocks23
Table 5. Customer Wiring Details23
Figure 28. Weidmuller Plug and Crimp Contact24
Figure 29. Extraction Tool in Use24
Figure 30. Left Accessory Tray24
Figure 31. Right Accessory Tray24
Section 5: Dimensional Drawings for Installation of Drawout Circuit Breaker and Cassette28
Section 6: Inspection and Maintenance44
Table 6. Inspection Frequency44
Figure 48. Typical Nameplate Information45
Figure 49. Step 146
Figure 50. Step 246
Figure 51. Step 446
Section 7: Troubleshooting47
Table 7. Circuit Breaker Troubleshooting Guide47

Eaton NRX Series - Page 41

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