Eaton 520 Operating Manual
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Eaton 520 Operating Manual

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Instruction Leaflet
Operating Manual for Series NRX
Trip Units - Digitrip™ 520/520M
Instructions apply to:
Series NRX, Type NF Frame
ANSI, UL1066, UL489 / IEC, IZMX16, IZM91
1600 NRX SUB-TITLE IMAGE (12/15/2010)
IL01301051E
effective September 2013
Series NRX, Type RF Frame
IEC, IZMX40
4000 NRX RF DRAWOUT SUBTITLE IMAGE (12/15/2010)
Series NRX

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Summary of Contents for Eaton 520

  • Page 1 Instruction Leaflet IL01301051E effective September 2013 Series NRX Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M Instructions apply to: Series NRX, Type RF Frame Series NRX, Type NF Frame ANSI, UL1066, UL489 / IEC, IZMX16, IZM91 IEC, IZMX40...
  • Page 2 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 EATON www.eaton.com...
  • Page 3 COMPLY WITH ALL GENERAL AND LOCAL HEALTH AND SAFETY LAWS, CODES, THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING. ALWAYS FOLLOW AND PROCEDURES. SAFETY PROCEDURES. EATON IS NOT LIABLE FOR THE MISAPPLICATION OR MISINSTALLATION OF ITS PRODUCTS. • Deviations of the mains voltage from the rated value must not...

  • Page 4: Table Of Contents

    Section 8: Communication Adapter in Eaton Series NRX circuit breakers ......6 Modules (CAM) ........25 Sensors .
  • Page 5 Figure 3. Installation of the Trip Unit into Frame Module Table 3. Available Digitrip 520 and 520M Trip Units ... . 8 of a Series NRX Circuit Breaker ......11 Table 4.

  • Page 6: Section 1: General Description Of Digitrip Trip Units In Eaton Series Nrx Circuit Breakers

    Example of CAT number replaced or upgraded in the field by the customer. The line of trip units consists of the Digitrip 520 and 520M for UL/ ANSI and IEC standards. The Digitrip 520 and 520M trip units may be applied on both 50 and 60 Hz systems.

  • Page 7: Mode Of Trip And Status Information

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 MNde Nf orip and soaous infNrmaoiNn On all models there are tri-colored light-emitting diodes (LED), that could be lit green, red, or orange. The status LED will blink green approximately once each second to indicate that the trip unit is operating normally.
  • Page 8 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 List of Digitrip 520/M trip units with type codings and catalogue numbers Digitrip 520 LI Catalogue Number: System Protection N5LI Protection Features: Long delay protection (L)
  • Page 9 Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Table 4. Technical Daoa Digitrip 520 LI Digitrip 520 LSI(G) Digitrip 520M System Protection Selective Protection Universal Protection Ampere range NF frame 200-1600A NF frame 200-1600A...
  • Page 10 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Digitrip identified by catalogue numbers and nameplates Digitrip 520 Digitrip 520 Digitrip 520 Digitrip 520M Digitrip 520M Cat # N5LI Cat # N5LSI Cat # N5LSIG...

  • Page 11: Installation And Removal

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 • CAUTION InsoallaoiNn and remNval Installation of the trip unit DO NOT FORCE THE RATING PLUG INTO THE CAVITY. Align the Digitrip trip unit with the two guide grooves of the Series Use a 1/8-inch / 3 mm wide screwdriver to tighten the mounting screw NRX circuit breaker.

  • Page 12: Display Feature (Digitrip 520M Only)

    Soandards The MCR is enabled only for the first two cycles following an initial The Digitrip 520/520M trip units are listed by Underwriters circuit breaker closing operation. The MCR will trip the circuit breaker Laboratories™ under UL File E7819 and UL File E52096 for use in instantaneously and flash the instantaneous (INST) red LED.

  • Page 13: High Instantaneous

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 High insoanoaneNus trip at a high current peak value which depends on the circuit breaker types and ratings. It will indicate by flashing the red instantaneous For Series NRX NF-Frames, all models of the trip unit have a high (INST) LED.

  • Page 14: Diagnostics Indicator-Circuit Breaker/Trip Unit

    (Figure 18). If the system neutral is grounded, but no possible tripping for faults within the zone of protection by coordinating phase to neutral loads are used, the Digitrip 520 includes all of the among all applicable circuit breakers in the system (mains, ties, components necessary for ground fault protection.

  • Page 15: Section 3: Protection Settings

    LED will flash red. Noee: Use ohe fNllNwing oN access Time Curreno Curves. GN oN EaoNn’s Web sioee: hoope://www.eaoNn.cNm and search “NRX Digiorip 520 Curves” . LNng delay seooings The long delay current setting I determines the maximum continous Figure 8.

  • Page 16: Short Delay Settings

    Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 ShNro delay seooings On Digitrip 520 LSI and 520M (R)LSI(G/A) trip units (IZMX...V and Available Settings ...U) tripping due to the short-circuit current I can be delayed by the 0.1, 0.2, 0.3, 0.4, 0.5...
  • Page 17 Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 GrNund faulo seooings If the trip unit is equipped with earth fault protection, loads can be Available Settings protected against impermissibly high ground-fault currents. There is a 0.25, 0.3, 0.35, 0.4,...
  • Page 18 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Table 5. Series NRX/Digiorip GrNund Faulo Sensing MNdes Ground (Earth) Sensing Breaker Secondary Contacts Neutral Input Ground Sensor Input Series NRX Frame Method Sensor Style...
  • Page 19 Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Table 8. GrNund (Earoh) Faulo Curreno Seooing - Residual - IEC Raoings Ground Fault Current Settings (Amperes)  Available Rating Plug (Amperes) I 0.25 0.30...
  • Page 20 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Sensor Types with graphics Phase Sensor Type - NF frame (IZMX16/IZM91) Phase Sensor Type - RF frame (IZMX40/IZM95) Neutral Sensor Type - NF frame (IZMX16/IZM91) Neutral Sensor Type - RF frame (IZMX40/IZM91) 5.80”...

  • Page 21: Section 4: Test Procedures

    Description of handheld test kit A battery-powered test kit is available and capable of testing the functional trip elements for trip units 520/520M and for Series NRX circuit breakers, including power up, instantaneous trip, short delay trip, and ground (earth) fault trip. These test selections are chosen with the switch labeled “Select Test”...

  • Page 22: Section 5: Trip Unit Battery

    Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Section 5: Trip unit battery • CAUTION EXERCISE CARE WHEN REPLACING THE BATTERY TO ENSURE THAT THE General CORRECT POLARITY IS OBSERVED. POLARITY MARKINGS ARE SHOWN The battery plays no part in the protection function of the trip system.

  • Page 23: Section 6: Rating Plugs

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Section 6: Rating plugs • WARNING THE RATED CURRENT VALUE OF A RATING PLUG MUST NOT EXCEED The rating plug defines the rated current (In) for the trip unit and is the...
  • Page 24 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Table 10. NRX Type RF Frame Raoing Plugs Group D Group E Group F Group G Frame Size 1600 2000 2500 4000 RP I...

  • Page 25: Section 7: Maintenance Mode Feature

    EQUIPMENT. DO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE ON EQUIPMENT WHILE IT IS ENERGIZED. ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING. ALWAYS FOLLOW SAFETY PROCEDURES. EATON IS NOT LIABLE FOR MISAPPLICATION OR IMPROPER INSTALLATION OF ITS PRODUCTS. • CAUTION OBSERVE ALL RECOMMENDATIONS, NOTES, CAUTIONS, AND WARNINGS RELATING TO THE SAFETY OF PERSONNEL AND EQUIPMENT.

  • Page 26: Section 9: References

    Enable for Enable for Source Sensing Communication Use the following to access Time Current Curves. Go to Eaton’s Web Control site: http://www.eaton.com and search “NRX Digitrip 520 Curves” . All Series NRX publications can be found on-line at http://www.eaton.com by searching for the respective publication number.

  • Page 27: Appendix A: Zone Interlocking Examples

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Appendix A: Zone interlocking examples Main and feeder trip units will begin to time out and, in the event that the branch circuit breaker does not clear the fault, the feeder circuit Case 1e: There is nN zNne selecoive inoerlNcking.
  • Page 28 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Legend Common (ungrounded) - Contact 28 Zone Out Output Signal - Contact 27 Zone In Input Signal from Lower Level Zone - Contact 29 Figure 25.

  • Page 29: Appendix B: Troubleshooting

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Appendix B: Troubleshooting Symptom Probable Cause Possible Solution(s) References Unit Status LED is Current through breaker is <100A No problem. Status LED will not operate...

  • Page 30: Appendix C: Specifications

    Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Symptom Probable Cause Possible Solution(s) References Circuit breaker tripping and orange Circuit breaker MCR (b) auxiliary switch not Check MCR (b) switch Refer to Appendix E or F master...

  • Page 31: Appendix D: Performance Testing For Ground Fault Trip Units Primary Injection

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Appendix D: Performance testing for ground • WARNING fault trip units—primary injection ELECTRICAL SHOCK OR BURN INJURY CAN OCCUR WHEN WORKING ON POWER SYSTEMS. ALWAYS TURN OFF POWER SUPPLYING CIRCUIT BREAKER North American Testing Requirements BEFORE CONDUCTING TESTS.

  • Page 32: Record Keeping

    Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Primary Disconnect Stabs (drawout only) Suitable Connectors Low Voltage AC Current Source Polarity and Identification Shorting Conductors Figure 27. CNnnecoiNn Deoails fNr CNnducoing Single-Phase Curreno Tesos Wioh ohe Circuio Breaker RemNved FrNm ohe Cell •...
  • Page 33 Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Series NRX TRIP FUNCTION SETTINGS Circuit No./Address Breaker Shop Order Reference ______________________________ ______________________________ PER UNIT MULTIPLIERS Rating Plug Amperes (I Continuous Ampere Rating = LDS x I...
  • Page 34 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 GROUND FAULT TEST RECORD FORM Ground Fault Test Record should be retained by those in charge of the building’s electrical installation in order to be available to the authority having jurisdiction.

  • Page 35: Appendix E: Typical Breaker Master Connection Diagram - Nf

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Appendix E: Typical breaker master connection diagram - NF Figure 32. Series NRX-NF frame (IZMX16/IZM91) breaker masoer cNnnecoiNn diagram drawing number 6D32389 (cNnoinued nexo page)

  • Page 36: Notes For Previous Page

    Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Figure 33. Series NRX-NF frame (IZMX16/IZM91) breaker masoer cNnnecoiNn diagram drawing number 6D32389 (cNnoinued frNm previNus page) NNoes fNr Figures 31 and 32 (Diagram drawing number 6D32389 - NF Frame) All contacts shown with circuit breaker open and discharged and control power de-energized.

  • Page 37: Appendix F: Typical Breaker Master Connection Diagram - Rf

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 Appendix F: Typical breaker master connection diagram - RF Figure 34. Series NRX-RF frame (IZMX40/IZM95) breaker masoer cNnnecoiNn diagram drawing number 6D32424 (cNnoinued Nn nexo page)
  • Page 38 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 Figure 35. Series NRX-RF frame (IZMX40/IZM95) masoer cNnnecoiNn diagram drawing number 6D32424 (cNnoinued frNm previNus page and nNoes Nn nexo page) EATON www.eaton.com...

  • Page 39: Notes For Pages 36 And 37 (Diagram Drawing Number 6D32424 - Rf Frame)

    Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 NNoes fNr pages 36 and 37 (Diagram drawing number 6D32424 - RF Frame) All contacts shown with circuit breaker open and discharged and control power de-energized. The OTS are shown in reset position.
  • Page 40 Instruction Leaflet IL01301051E Operating Manual for Series NRX Trip Units - Digitrip™ 520/520M effective September 2013 EATON www.eaton.com...
  • Page 41 Operating Manual for Series NRX Instruction Leaflet IL01301051E Trip Units - Digitrip™ 520/520M effective September 2013 EATON www.eaton.com...
  • Page 42 Trip Units - Digitrip™ 520/520M effective September 2013 Disclaimer of warranties and limitation of liability In no event will Eaton be responsible to the purchaser or user in The information, recommendations, descriptions, and safety contract, in tort (including negligence), strict liability, or otherwise notations in this document are based on Eaton Corporation’s...

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