GE EntelliGuard G - Figure 3.16. Ground Fault: Multiple of Sensor

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DET-653C EntelliGuard

G Circuit Breaker Application Guide

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

Figure 3.16. Ground Fault: Multiple of Sensor

Main Page

Table of Contents2
Introduction7
- Table 1.3. ANSI/UL1066 Ratings8
- Table 1.6. Non-Automatic Circuit Breaker/Molded Case Switch – UL Version Ratings9
- Figure 2.1. Entelliguard G Features and Characteristics10
- Standard and Optional Features11
Section 2. Features and Characteristics10
Section 3. Entelliguard TU Trip Unit System15
- Introduction15
- Reliability Without Compromising Protection15
- Arc Flash and the Entelliguard TU Trip Unit15
- Selectivity with Molded Case Circuit Breakers and Other Devices16
- Figure 3.1. Arcing Current16
- Table 3.1. Entelliguard Selectivity above GE Current Limiting Circuit Breakers17
- Table 3.2. Maximum Instantaneous Pickup Multipliers for GE Circuit Breakers18
- Table 3.3. Selectivity with Entelliguard TU Trip Units in ANSI and ICCB/ Power Break II Circuit Breakers19
- Above Downstream Feeders20
- The Waveform Recognition Selective Instantaneous20
Above Other Power Circuit Breakers21
Table 3.4. Minimum Selective Clearing Times for an Entelliguard G Circuit Breaker21
Terminology21
Long Time Protection22
Thermal Long Time Overcurrent22
Fuse-Shaped Steep Long Time Overcurrent23
Table 3.6. Fuse Characteristic: Nominal Clearing and Commit Times for X Multipliers of Nominal Pickup24
Short Time Protection25
- Short Time Pickup25
- Short Time Bands26
- Short Time I 2 T Slopes26
- T (in or Out)26
Thermal Memory25
Ground Fault Protection26
Internal Residual Summation26
External Zero Sequence Input27
Ground Fault Pickup Settings27
Ground Fault Protection Curves27
Ground Fault Time Delay Bands27
Instantaneous Protection27
Adjustable Selective Instantaneous28
High Set Instantaneous Overcurrent (HSOIC)29
Making Current Release (MCR)29
Reduced Energy Let-Through (RELT) Instantaneous Trip29
Reduced Energy Let-Through Switch Wiring30
Zone Selective Interlocking (ZSI)30
Table 3.14. Instantaneous ZSI on Entelliguard TU Trip Units in ANSI Entelliguard G Circuit Breakers31
Figure 3.11. Zone Selective Interlocked CB, Upper CB Shown "Unrestrained32
Rating Plugs32
Table 3.15. Trip Rating Plug Specifications33
Universal Spare Trip Unit34
Table 3.18. Universal Spare Trip Unit Options (User-Selected)35
Protective Relays36
Relay Functions36
Voltage Unbalance Relay36
- Current Unbalance Relay37
- Under Voltage Relay37
- Under Voltage Relay Zero-Volt Trip Enable37
- Over Voltage Relay37
- Power-Reversal Relay37
- Power-Direction Setup37
- Potential Transformer Primary Voltage37
- Potential Transformer Connection37
- Power Demand Intervals37
- Current Alarm37
- Outputs for Entelliguard G Circuit Breakers38
- Waveform Capture38
- Table 3.25 Input Assignments Possible38
- Entelliguard Trip Unit Performance Characteristics Graphs39
- Table 3.28. Metering Data Startup Levels for Breaker with Entelliguard Trip Unit with 24 VDC41
- Figure 3.14. Long Time Circuit Breaker Characteristics42
- Figure 3.15. Short Time Pickup and Delay Bands43
- Figure 3.16. Ground Fault: Multiple of Sensor44
- Figure 3.17. Instantaneous, Override (HSIOC), Reduced Energy Let-Through Instantaneous (RELT)45
Section 4. Accessories46
- Introduction46
- Motorized Spring Charging Unit46
- Circuit Breaker Closing Coils - Standard and Commanded46
- Command Operation Module47
- Shunt Trip47
- Status Indication Switch (Coil Signaling Contact)47
- Under Voltage Release with Fixed Time Delay47
- Table 4.2. Closing Coil Characteristics47
- Time Delay Module for UVR (Externally Mounted)48
- Remote Operation Coil Combination48
- Ready to Close Contact48
- Auxiliary Switches48
- Figure 4.2. Time Delay Module48
- Table 4.11. Power Rated (3NO/3NC) (Ref Drawing 10099230)49
Circuit Breaker - Key Interlock Facility50
Table 4.14. Power Rated (4NO/4NC) + Low Signal (Hi-Fi) (4NO/4NC) (Ref Drawing 1009923450
Carriage Position Switch (TOC)51
- Mechanical Interlocks (Cable/Rod) (OEM Applications Only)51
- Cables51
- Table 4.20. Interlock Configurations52
Bell Alarm with Lockout53
Charging Spring Status Indicator53
Secondary Disconnects (Factory-Installed/Field Installable)53
Table 4.26. Wiring Schematic for Block B54
Table 4.29. Wiring Schematic Nomenclature Definitions55
Cassette/Substructure56
Door Interlocks56
Ground Fault56
Mechanical Operations Counter56
Position Indicators56
Sealed Door Panel Escutcheon56
Back Connected Terminations57
Table 4.34. Back Connected Terminations59
Front Flat Terminations62
Table 4.36. Cluster63
Table 4.37. Cluster Pad64
Grounding/Earthing Device (IEC Only)65
Rejection Device65
Remote Racker65
Terminations for DC Switches UL 489B65
Section 5. Catalog Numbering Guide66
- Entelliguard G ANSI/UL489 Circuit Breaker Catalog Number Guide66
- Entelliguard G Cassette Catalog Number Guide74
- Entelliguard TU Trip Unit for Entelliguard G Breaker76
- Entelliguard TU Trip Unit Rating Plugs78
Section 6. Application Data79
- Introduction79
- Key Features79
- Ratings and Sizes79
- Short Circuit Interrupting Ratings80
- Withstand Ratings, Selective Adjustable-, RELT- and Override-Instantaneous Protection80
- Close and Latch Ratings and Making Current Release (MCR) Instantaneous Trip81
- Operations82
- Selecting a Circuit Breaker for an Application82
- Cable or Bus Size - Factor a82
- Table 6.4. Entelliguard G Non-Automatic Switch Close, Latch, and Withstand Ratings, UL489 Listed82
- Ambient Temperature - Factor B83
- Operating Frequency - Factor C83
- Altitude - Factor D83
- Load Class Rating - Factor E83
- Safety - Factor F84
- Other Factors that Influence Circuit Breaker Sizing 100% Vs. 80% Ratings84
- Table 6.9. Load Class Rating – Factor E84
Section 7. Physical Data85
- Dimensional Drawings85
- Dimensional Drawing Index86
- Dimensions87
Section 8. Standards and References88
- Publications91

GE EntelliGuard G - Figure 3.16. Ground Fault: Multiple of Sensor

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