3
EATON
www.eaton.com
Effective September 2013
Instructional Leaflet IL01301064E
Operating Manual for Series NRX
Digitrip Trip Units 1150 / 1150i
TABLE OF FIGURES
Description page
Figure 1.
Digitrip 1150 Trip Unit With Rating Plug and Frame Module . . . . . . . . . . . . . . . 5
Figure 2. NRX NF Circuit Breaker with Digitrip 1150 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. Series NRX NF Frame Phase Current Sensor . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 4. Trip Unit Installation on a Frame Module . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 5. Installation of the Rating Plug into the Trip Unit . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6. Trip Unit Locking Tabs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 7. Frame Module With Trip Unit Removed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 8. Block Diagram With Breaker Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 9. Series NRX RF Frame Neutral Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 10. Series NRX NF Frame Neutral Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 11. Trip Unit and Display Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 12. Trip Unit Indicators (LSIG style with Maintenance Mode) . . . . . . . . . . . . . . 20
Figure 13. Display Module Push Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14. Long Delay Time Setting Bands for I
2
t settings . . . . . . . . . . . . . . . . . . . . . . 24
Figure 15. Short Delay Time Setting Bands - Flat and I
2
t . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 16. Functional Test Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 17. Connections for Single-Pole, Single-Phase Current Tests . . . . . . . . . . . . . . . 30
Figure 18. Connections for Single-Phase Current Tests With Two Poles in Series . . . . 30
Figure 19. Typical Trip Function Record Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 20. Automatic Trip Operation Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 21. Typical Performance Test Record Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 22. Digitrip Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 23. CAM Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 24. Example of Interlocking with Three Zones . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 25. ZSI Example With Mains (M1, M2) and Tie (T) Circuit Breakers . . . . . . . . . 39
Figure 26. IEC Sign Convention Phasor Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Figure 27. IEEE Sign Convention Phasor Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Figure 28. IEEE Direct Mathematical Sign Convention Phasor Diagram . . . . . . . . . . . 93