Cutler-Hammer Digitrip 520MC Manuals

Manuals and User Guides for Cutler-Hammer Digitrip 520MC. We have 1 Cutler-Hammer Digitrip 520MC manual available for free PDF download: Instructions Manual

Cutler-Hammer Digitrip 520MC Instructions Manual

Cutler-Hammer Digitrip 520MC Instructions Manual (38 pages)

Trip Units for use only in Cutler-Hammer Magnum and Magnum DS Circuit Breakers

Brand: Cutler-Hammer | Category: Circuit breakers | Size: 2 MB

Table of Contents

Table of Contents
1
1 General Description of Digitrip Trip Units

2
2 General Description of Magnum Circuit Breakers

7
3 Principles of Operation

10
- General
  10
- Trip and Operation Indicators
  15
- Making Current Release
  15
- Zone Interlocking (520 Family Only)
  15
4 Protection Settings

20
- General
  20
- Long Delay Current Setting
  20
- Long Delay Time Setting
  20
- Short Delay Current Setting
  21
- Short Delay Time Setting
  21
- Instantaneous Current Setting
  21
- Ground Fault Current Setting
  22
- Ground Fault Time Delay Setting
  22
- INCOM Communications (520MC Model Only)
  22
5 Test Procedures

24
- General
  24
- When to Test
  24
- Functional Field Testing
  24
  - Field Test Kit
    24
  - Handheld Functional Test Kit
    25
    
    Description of Handheld Test Kit
    25
    
    Test Procedure
    25
    
    Currents
    25
    
    Batteries
    25
- Performance Testing for Ground Fault Trip Units - Primary Injection
  25
  - Code Requirements
    25
  - Standards Requirements
    25
  - General Test Instructions
    25
6 Battery

26
- General
  26
- Battery Check
  26
- Battery Installation and Removal
  27
7 Frame Ratings (Sensor Ratings and Rating Plugs)

27
8 Record Keeping

28
9 References

28
- Magnum and Magnum DS Circuit Breakers
  28
- Time-Current Curves
  28
Appendix A Zone Interlocking Examples

32
Appendix B Troubleshooting Guide

34
Appendix C Typical Breaker Master Connection Diagram

36

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