Instructional Leaflet IL70C1037H05 Effective …

1 Effective October 2009 Instructional Leaflet IL70C1037H05 Digitrip models 520, 520i; and 520M, 520Mi,520MC, 520 MCi trip units for use only inMagnum and Magnum DS circuit breakersm WARNINGDO NOT ATTEMPT TO INSTALL OR PERFORM MAINTENANCE ON EQUIPMENT WHILE IT IS ENERGIZED. DEATH OR SEVERE PERSONAL INJURY CAN RESULT FROM CONTACT WITH ENERGIZED EQUIPMENT. ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT BEFORE PROCEEDING. ALWAYS FOLLOW SAFETY PROCEDURES. EATON IS NOT LIABLE FOR THE MISAPPLICATION OR MISINSTALLATION OF ITS WARNINGOBSERVE ALL RECOMMENDATIONS, NOTES, CAUTIONS, AND WARNINGS RELATING TO THE SAFETY OF PERSONNEL AND EQUIPMENT. OBSERVE AND COMPLY WITH ALL GENERAL AND LOCAL HEALTH AND SAFETY LAWS, CODES, AND :NThe recommendations and information contained herein are based on experience and judgement, but should not be considered to be all inclusive or to cover every application or circumstance that may you have any questions or need further information or instructions, please contact your local Eaton representative or visit Leaflet IL70C1037H05 Effective October 2009 Digitrip models 520, 520i; and 520M, 520Mi,520MC, 520 MCi trip units for use only inMagnum and Magnum DS circuit breakerseaton corporation PagtDtscripoiNn PagtList of figures.

2 3 List of tables ..4 Section 1: General description of Digitrip trip units ..5 Protection ..5 Mode of trip and status information ..5 Installation and removal ..8 Wiring ..9 Plexiglass cover ..9 Ground Alarm/Power Supply Module (520M/MC models only) . 9 Display feature (520M and 520MC only) ..10 Standards ..10 Section 2: General description of Magnum circuit breakers ..11 General ..11 Low-energy trip actuator ..11 Ground fault protection ..11 Current sensors (Magnum standard frames) ..17 Current sensors (Magnum double-wide frames) ..17 Section 3: Principles of operation ..17 General ..17 trip and operation indicators ..17 Making Current Release ..17 Zone interlocking ..17 Section 4: Protection settings ..22 General ..22 Long delay current setting.

3 22 Long delay time setting ..23 Short delay current setting ..23 Short delay time setting ..23 Instantaneous current setting ..24 Ground fault current setting ..24 Ground fault time delay setting ..24 INCOM (Digitrip 520MC models only) ..25 Section 5: Test procedures ..26 General ..26 When to test ..26 Functional field testing ..26 Performance testing for ground fault trip units primary injection ..27 Section 6: trip unit battery ..29 General ..29 Battery check ..29 Battery installation and removal ..29 Section 7: Frame ratings (sensor ratings and rating plugs) ..30 Section 8: Record keeping ..30 Section 9: References ..31 Magnum and Magnum DS circuit breakers ..31 Time-current curves ..31 Section 10: Digitrip 520MC with Maintenance Mode.

4 32 General ..32 Maintenance Mode settings ..32 Arming Maintenance Mode ..32 Remote indicator ..32 Choosing the reduction setting ..32 Tripping and testing ..32 Appendix A: Zone interlocking examples ..34 Appendix B: Troubleshooting guide ..36 Appendix C: Typical breaker master connection diagram ..37 Appendix D: Modbus translator wiring ..383 Instructional Leaflet IL70C1037H05 Effective October 2009 Digitrip models 520, 520i; and 520M, 520Mi,520MC, 520 MCi trip units for use only inMagnum and Magnum DS circuit breakerseaton corporation 1. Digitrip 520MC trip Unit with Rating Plug ..5 Figure 2. Installation of the Digitrip Unit into a Magnum Breaker (Side View)..8 Figure 3. Installation of the Rating Plug and Mounting Screw.

5 9 Figure 4. Ground Alarm/Power Supply Module for the 520M or 520MC trip Units ..9 Figure 5. Wiring Diagram for 520M and 520MC Models with Ground Alarm/Power Supply Module ..10 Figure 6. Tripping Circuit for a Typical Magnum Breaker (Partial) ..11 Figure 7. Three-Pole, Four-Wire Breaker with Neutral Sensor Connections for 3200A Frame Using Residual Ground Fault Sensing ..13 Figure 8. Neutral Sensor Connections for 4000A Frame Using Residual Ground Fault Sensing ..13 Figure 9. Digitrip Neutral Sensor Types (or Source Ground Sensor) 14 Figure 10. Four-Pole 3200A Frame (4000A IEC) Using Residual Ground Fault (Earth-Fault) Sensing ..14 Figure 11. Source Ground Fault Sensing Scheme for 3200A Frame ..15 Figure 12. Source Ground Fault Sensing Scheme for 4000A Frame Double-Wide.

6 15 Figure 13. Zero Sequence Sensing Scheme for 3200A Frame ..16 Figure 14. Multiple Source/Multiple Ground Scheme ..16 Figure 15. Block Diagram with Breaker Interface ..18 Figure 16. Digitrip 520 LI ..19 Figure 17. Digitrip 520 LSI ..19 Figure 18. Digitrip 520 LSIG ..19 Figure 19. Digitrip 520i WLSIG ..19 Figure 20. Digitrip 520M MLSI ..20 Figure 21. Digitrip 520M MLSIA ..20 Figure 22. Digitrip 520M MLSIG ..20 Figure 23. Digitrip 520Mi MWLSIG ..20 Figure 24. Digitrip 520MC CLSI ..21 List of figuresDtscripoiNn PagtDtscripoiNn PagtFigure 25. Digitrip 520MC CWLSIG ..21 Figure 26. Digitrip 520MC ARMLSI ..21 Figure 27. Digitrip 520MC ARMLSIG ..21 Figure 28. Digitrip 520MC ARMLSIA ..22 Figure 29. Digitrip 520MC ARMWLSIG ..22 Figure 30.

7 Long Delay Current Settings ..22 Figure 31. Long Delay Time Settings ..23 Figure 32. Long Time Memory (LTM) Jumper ..23 Figure 33. Short Delay Current Settings ..23 Figure 34. Short Delay Time Settings ..24 Figure 35. Instantaneous Current Settings ..24 Figure 36. Ground Fault Current Settings ..24 Figure 37. Ground Fault Time Delay Settings ..25 Figure 38. INCOM Network with Remote Master Computer or BIM ..25 Figure 39. Functional Test Kit ..27 Figure 40. Connection Details for Conducting Single-Pole, Single-Phase Current Tests with the Breaker Removed from the Cell ..28 Figure 41. Connection Details for Conducting Single-Phase Current Tests with the Breaker Removed from the Cell..28 Figure 42. Alternate Connection Details Using Three Poles to Develop a Ground Fault Condition.

8 28 Figure 43. Digitrip Battery ..29 Figure 44. Typical trip Function Record Nameplate ..30 Figure 45. Automatic trip Operation Record ..30 Figure 46. Typical Performance Test Record Form ..31 Figure 47. Maintenance Mode Wiring Digitrip 520MC ..33 Figure 48. Typical Zone Interlocking ..34 Figure 49. Typical Zone Interlocking Connections with Two Main Breakers (M1, M2) and a Tie Breaker (T) ..35 Figure 50. Typical Breaker Master Connection Diagram ..37 Figure 51. Modbus Translator Wiring ..384 Instructional Leaflet IL70C1037H05 Effective October 2009 Digitrip models 520, 520i; and 520M, 520Mi,520MC, 520 MCi trip units for use only inMagnum and Magnum DS circuit breakerseaton corporation of tablesDtscripoiNn PagtTable 1.

9 Protection Types Available for Digitrip trip Units ..6 Table 2. Communication Functions Available for Digitrip 520MC Units ..7 Table 3. Digitrip Sensing Modes ..11 Table 4. Ground (Earth) Fault Current Settings ..125 Instructional Leaflet IL70C1037H05 Effective October 2009 Digitrip models 520, 520i; and 520M, 520Mi,520MC, 520 MCi trip units for use only inMagnum and Magnum DS circuit breakerseaton corporation 1: General description of Digitrip trip unitsDigitripE trip units are breaker subsystems that provide the protective functions of a circuit breaker. The trip units are in removable housings, installed in the breaker, and can be replaced or upgraded in the field by the customer. This Instructional Leaflet specifically covers the application of Digitrip trip units (see Tablt 1) installed in MagnumE and Magnum DS breakers.

10 Throughout this Instructional Leaflet , the use of the term Magnum breakers refers to both the Magnum and Magnum DS low voltage, AC power circuit Magnum Digitrip line of trip units consists of the 520, 520M, and 520MC for ULT standards and models 520i, 520Mi, and 520 MCi for IEC standards. (See Tablt 1 for available protection types.) Only models 520MC and 520 MCi provide communications. (See Tablt 2 for data that will be communicated.)The Digitrip 520, 520M, and 520MC trip units may be applied on both 50 and 60 Hz 1. Digiorip 520MC trip Unio wioh Raoing PlugAuxiliary Power Module InputRating PlugProtection SettingsCause of trip LEDINCOM Transmit LEDTest Port (covered)Four- Character LCDAll trip unit models are microprocessor-based AC protection devices that provide true rms current sensing for the proper coordination with the thermal characteristics of conductors and equipment.