GE EntelliGuard G Application Manual

imagination at work

EntelliGuard

Circuit Breaker

Application Guide

GE Energy

Now with the following new ratings:

• Envelope 1, 100KAIC, 2000A and below

• Envelope 1, 65KAIC, 1200A and below

• Envelope 2, 100KAIC @ 600V rating

• UL489B DC Switch Ratings @ 600V and 1000V DC

DET-653C EntelliGuard® G Circuit Breaker Application Guide

SECTION 1 – GENERAL INFORMATION

SECTION 2 – FEATURES AND CHARACTERISTICS

SECTION 3 – ENTELLIGUARD TU TRIP UNIT SYSTEM

24-May-12 Table of Contents

Introduction .............................................................................................................................................................................................................. 1

Table 1.1. Device Standards and References ............................................................................................................................... 1

Table 1.2. Device Ratings ........................................................................................................................................................................ 1

Table 1.3. ANSI/UL1066 Ratings .......................................................................................................................................................... 2

Table 1.4. UL489 Ratings ......................................................................................................................................................................... 2

Table 1.5. Non-Automatic Circuit Breaker – ANSI Version Ratings ................................................................................... 2

Table 1.6. Non-Automatic Circuit Breaker/Molded Case Switch – UL Version Ratings .......................................... 2

Table 1.6b UL489B Ratings .................................................................................................................................................................... 3

Figure 2.1. EntelliGuard G Features and Characteristics ................................................................................................................. 4

STANDARD AND OPTIONAL FEATURES ....................................................................................................................................................... 5

Short Time Rating (1/2 Sec) ..................................................................................................................................................................... 5

Short Circuit/High Interruption Rating .............................................................................................................................................. 5

Thermal Performance ............................................................................................................................................................................... 5

Table 2.1. Sensors Available .......................................................................................................................................................... 5

Reverse Feed .................................................................................................................................................................................................. 5

Two-Step Stored Energy Mechanism ................................................................................................................................................ 5

Field Installable Trip Units and Accessories ................................................................................................................................... 5

Coils ............................................................................................................................................................................................................ 6

Breaker/Main Contact Status ................................................................................................................................................................ 6

Motor Operator ............................................................................................................................................................................................. 6

Electrical Closing Button .......................................................................................................................................................................... 6

Ready to Close Indicator .......................................................................................................................................................................... 6

Mounting Straps/Accessories ............................................................................................................................................................... 6

Auxiliary Switches ........................................................................................................................................................................................ 6

Interlocks .......................................................................................................................................................................................................... 6

Breaker Status Indicators ........................................................................................................................................................................ 6

Rejection Feature ......................................................................................................................................................................................... 7

Through-Door Racking .............................................................................................................................................................................. 7

Padlocking Devices ..................................................................................................................................................................................... 7

Key Interlock ................................................................................................................................................................................................... 7

Shutters ............................................................................................................................................................................................................ 7

Carriage Position Switch .......................................................................................................................................................................... 7

Lifting Beam .................................................................................................................................................................................................... 7

IP Covers ........................................................................................................................................................................................................... 7

Mechanical Counter ................................................................................................................................................................................... 7

Cable Interlocks (OEM Applications Only) ........................................................................................................................................ 8

Bell Alarm Contact ....................................................................................................................................................................................... 8

Reliability without Compromising Protection ......................................................................................................................................... 9

Arc Flash and the EntelliGuard TU Trip Unit ............................................................................................................................................ 9

Figure 3.1. Arcing Current ...................................................................................................................................................................... 10

Selectivity with Molded case Circuit Breakers and Other Devices ............................................................................................ 10

Figure 3.2. Selectivity Curve.................................................................................................................................................................. 10

Table 3.1. EntelliGuard Selectivity Above GE Current Limiting Circuit Breakers ....................................................... 10

Table 3.2. Maximum Instantaneous Pickup Multipliers for GE Circuit Breakers ....................................................... 11

Table 3.3. Selectivity with EntelliGuard TU Trip Units in ANSI and ICCB/ Power Break II Circuit Breakers .. 13

Above Downstream Feeders ......................................................................................................................................................................... 14

The Waveform Recognition Selective Instantaneous ...................................................................................................................... 14

Table 3.4. Minimum Selective Clearing Times for an EntelliGuard G Circuit Breaker ............................................. 15

DET-653C EntelliGuard® G Circuit Breaker Application Guide 24-May-12 Table of Contents

Above Other Power Circuit Breakers ........................................................................................................................................................ 15

Terminology ........................................................................................................................................................................................................... 15

Long Time Protection ................................................................................................................................................................................. 16

Thermal Long Time Overcurrent ................................................................................................................................................................ 16

Figure 3.3. Table. 3.5.

Fuse-Shaped Steep Long Time Overcurrent ........................................................................................................................................ 17

Figure 3.4. Fuse Table 3.6. Fuse

Thermal Memory ................................................................................................................................................................................................. 19

Short Time Protection ....................................................................................................................................................................................... 19

Short Time Pickup ..................................................................................................................................................................................... 19

Short Time Bands ...................................................................................................................................................................................... 20

Short Time I

Ground Fault Protection .................................................................................................................................................................................. 20

Internal Residual Summation ....................................................................................................................................................................... 20

External Zero Sequence Input...................................................................................................................................................................... 21

Ground Fault Pickup Settings ....................................................................................................................................................................... 21

Table 3.9. Ground Fault Time Delay Bands .................................................................................................................................. 21

Ground Fault Time Delay Bands ................................................................................................................................................................. 21

Table 3.10. Minimum Ground Fault Pickup and Clear Time ................................................................................................ 21

Ground Fault Protection Curves ................................................................................................................................................................. 21

Figure 3.9. Ground Fault Characteristics ...................................................................................................................................... 21

Instantaneous Protection ............................................................................................................................................................................... 21

Adjustable Selective Instantaneous ......................................................................................................................................................... 22

Table 3.11. Max. Adjustable Instantaneous Pickup for CBs with Normal or Extended Range Option ......... 22

Table 3.12. Time Current Curves .......................................................................................................................................................

High Set Instantaneous Overcurrent (HSOIC) ...................................................................................................................................... 23

Making Current Release (MCR) ..................................................................................................................................................................... 23

Table 3.13. HSIOC Locations ................................................................................................................................................................ 23

Reduced Energy Let-Through (RELT) Instantaneous Trip .............................................................................................................. 23

Reduced Energy Let-Through Switch Wiring ....................................................................................................................................... 24

Figure 3.10. Integrated Switch And LED, Spring Return from “Test” to ‘Off,” Latched in “On” .......................... 24

Zone Selective Interlocking (ZSI ) ................................................................................................................................................................ 24

Table 3.14. Instantaneous ZSI on EntelliGuard TU Trip Units in ANSI EntelliGuard G Circuit Breakers ........ 25

Figure 3.11. Zone Selective Interlocked CB, Upper CB Shown “Unrestrained” ......................................................... 25

Figure 3.12. Zone Selective Interlocked CB, Upper CB Shown “Restrained” .............................................................. 25

Rating Plugs ........................................................................................................................................................................................................... 26

Figure 3.13. EntelliGuard Trip Unit Rating Plug Catalog Number Guide ...................................................................... 26

Table 3.15. Trip Rating Plug Specifications .................................................................................................................................. 27

Table 3.16. Trip Rating Plug Codes ................................................................................................................................................... 27

Table 3.17. EntelliGuard G Rating Plug Logic (UL 489,n UL 1066, IEC) ........................................................................... 28

Universal Spare Trip Unit ................................................................................................................................................................................ 28

Table 3.18. Universal Spare trip Unit Options (User-Selected) ........................................................................................... 22

Relay Functions ................................................................................................................................................................................................... 29

Protective Relays................................................................................................................................................................................................. 30

Voltage Unbalance Relay ............................................................................................................................................................................... 30

Table 3.19. Relay Functions Available in EntelliGuard G CBs with EntelliGuard TUs ............................................. 30

Table 3.20. Voltage Unbalance Settings ....................................................................................................................................... 30

Thermal Characteristic: Max. and Min. Long Time Delay Bands for a 1000A Long Time Pickup ...... 16

Thermal Characteristic: Nominal Clearing and Commit Times for X Multipliers of Nominal Pickup 17

Characteristic: Max. and Min. Long Time Delay Bands for a 1000A Long Time Pickup ............. 17

Characteristic: Nominal Clearing and Commit Times for X Multipliers of Nominal Pickup ........ 18

Figure 3.5. Short Time Pickup .................................................................................................................................................... 19

Figure 3.6. Short Time Transition ............................................................................................................................................. 19

Table 3.7. Short Time Delay Bands ......................................................................................................................................... 20

Figure 3.7 Short Time Delay ....................................................................................................................................................... 20

Figure 3.8. Short I

t Slopes ................................................................................................................................................................................ 20

t (In or Out).................................................................................................................................................... 20

DET-653C EntelliGuard® G Circuit Breaker Application Guide

SECTION 4 – ACCESSORIES

24-May-12 Table of Contents

Current Unbalance Relay ................................................................................................................................................................................ 31

Table 3.21. Current Unbalance Settings ........................................................................................................................................ 31

Under Voltage Relay .......................................................................................................................................................................................... 31

Under Voltage Relay Zero-Volt Trip Enable ........................................................................................................................................... 31

Table 3.22. Under Voltage Settings .................................................................................................................................................. 31

Over Voltage Relay ............................................................................................................................................................................................. 31

Table 3.23. Over Voltage Settings ..................................................................................................................................................... 31

Power-Reversal Relay ....................................................................................................................................................................................... 31

Table 3.24. Power-Reversal Settings ............................................................................................................................................... 31

Power-Direction Setup ..................................................................................................................................................................................... 31

Potential Transformer Primary Voltage ................................................................................................................................................... 31

Potential Transformer Connection ............................................................................................................................................................. 31

Power Demand Intervals ................................................................................................................................................................................. 31

Current Alarm ........................................................................................................................................................................................................ 31

Trip Logic Inputs ................................................................................................................................................................................................... 31

Table 3.25 Input Assignments Possible .......................................................................................................................................... 32

Outputs for EntelliGuard G Circuit Breakers.......................................................................................................................................... 32

Table 3.26. Output Configuration ...................................................................................................................................................... 32

Waveform Capture ............................................................................................................................................................................................. 32

EntelliGuard Trip Unit Performance Characteristics Graphs ........................................................................................................ 33

Table 3.27. EntelliGuard Trip Unit Summary ................................................................................................................................ 33

Table 3.28. Metering Data Startup Levels for breaker with Entelliguard Trip Unit with 24 VDC ...................... 35

Table 3.29. Metering Data for breaker with Entelliguard Trip Unit without 24 VDC requires 20%

sensor current and then all metering will be available ............................................................................... 35

Figure 3.14. Long Time Circuit Breaker Characteristics ....................................................................................................... 36

Figure 3.15. Short Time Pickup and Delay Bands ..................................................................................................................... 37

Figure 3.16. Ground Fault: Multiple of Sensor ............................................................................................................................. 38

Figure 3.17. Instantaneous, Override (HSIOC), Reduced Energy Let-Through Instantaneous (RELT) ............ 39

Figure 4.1. Accessory Mounting ......................................................................................................................................................... 40

Motorized Spring Charging Unit .................................................................................................................................................................. 40

Table 4.1. Motor Operators .................................................................................................................................................................. 40

Circuit Breaker Closing Coils – Standard and Commanded ......................................................................................................... 40

Table 4.2. Closing Coil Characteristics ............................................................................................................................................ 41

Command Operation Module ....................................................................................................................................................................... 41

Shunt Trip ................................................................................................................................................................................................................ 41

Table 4.3. Extended Range Shunt Trip for UL Ground Fault and ANSI DC Rating Applications ........................ 41

Status Indication Switch (Coil Signaling Contact) ............................................................................................................................... 41

Table 4.4. Coil Signaling Contact Module ...................................................................................................................................... 41

Under Voltage Release with Fixed Time Delay .................................................................................................................................... 41

Table 4.5. UVR Operating Characteristics ..................................................................................................................................... 41

Time Delay Module for UVR (Externally Mounted) .............................................................................................................................. 42

Figure 4.2. Time Delay Module .......................................................................................................................................................... 42

Table 4.6. TDM Characteristics .......................................................................................................................................................... 42

Remote Operation Coil Combination ........................................................................................................................................................ 42

Table 4.7. Remote Operation Coil Combination ......................................................................................................................... 42

Ready to Close Contact .................................................................................................................................................................................... 42

Table 4.8. Ready to Close Contacts (1NO) ..................................................................................................................................... 42

Table 4.9. Auxiliary Switches ................................................................................................................................................................ 42

Table 4.10. Auxiliary Switch Ratings and Secondary Disconnect Points ...................................................................... 42

Table 4.11. Power Rated (3NO/3NC) (Ref Drawing 10099230) ........................................................................................... 43

Table 4.12. Power Rated (8NO/8NC) (Ref Drawing 10099228) ........................................................................................... 43

DET-653C EntelliGuard® G Circuit Breaker Application Guide 24-May-12 Table of Contents

Table 4.13. Power Rated (3NO/3NC) + Low Signal (Hi-Fi) (2NO/2NC) (Ref Drawing 10099232) ........................ 43

Table 4.14. Power Rated (4NO/4NC) + Low Signal (Hi-Fi) (4NO/4NC) (Ref Drawing 10099234 ......................... 44

Circuit Breaker – Key Interlock Facility .................................................................................................................................................... 44

Table 4.15. Key Interlocks and Door Interlocks ......................................................................................................................... 44

Figure 4.3. Breaker-Mounted Key Interlock ................................................................................................................................. 44

Figure 4.4. Cassette-Mounted Key Interlock ............................................................................................................................... 44

Carriage Position Switch (TOC) .................................................................................................................................................................... 45

Table 4.16. Carriage Position Switches .......................................................................................................................................... 45

Table 4.17. Carriage Position Switch Ratings (Common NO/NC Contact Configuration ..................................... 45

Mechanical Interlocks (Cable/Rod) (OEM Applications Only) .............................................................................................. 45

Table 4.18. Mechanical Interlock (Cable/Rod) ............................................................................................................................ 45

Cables .............................................................................................................................................................................................................. 45

Table 4.19. Cables for Mechanical Interlocks ............................................................................................................................. 45

Table 4.20. Interlock Configurations ............................................................................................................................................... 46

Bell Alarm with Lockout ................................................................................................................................................................................... 47

Table 4.21. Bell Alarm Switches ......................................................................................................................................................... 47

Table 4.22. Bell Alarm Ratings (Common 1NO/NC Contact Configuration) ................................................................ 47

Charging Spring Status Indicator ............................................................................................................................................................... 47

Table 4.23 Spring Charged Contact (1NO) ................................................................................................................................... 47

Secondary Disconnects (Factory-Installed/Field Installable) ...................................................................................................... 47

Table 4.24. Block Location .................................................................................................................................................................... 47

Table 4.25. Wiring Schematic for Block A ..................................................................................................................................... 47

Table 4.26. Wiring Schematic for Block B ..................................................................................................................................... 48

Table 4.27. Wiring Schematic for Block C ..................................................................................................................................... 48

Table 4.28. Electronic Interlock .......................................................................................................................................................... 48

Table 4.29. Wiring Schematic Nomenclature Definitions .................................................................................................... 49

Ground Fault ......................................................................................................................................................................................................... 50

Table 4.30. Neutral Rogowski CTs .................................................................................................................................................... 50

Sealed Door Panel Escutcheon ................................................................................................................................................................... 50

Mechanical Operations Counter ................................................................................................................................................................. 50

Table 4.31. Miscellaneous Accessories .......................................................................................................................................... 50

Cassette/Substructure ..................................................................................................................................................................................... 50

Position Indicators ................................................................................................................................

Door Interlocks ..................................................................................................................................................................................................... 51

Table 4.32. Door Interlocks ................................................................................................................................................................... 50

Back Connected Terminations .................................................................................................................................................................... 51

Table 4.33. Back Connected Terminations for Cassette ....................................................................................................... 51

Table 4.34. Back Connected Terminations .................................................................................................................................. 53

Front Flat Terminations ................................................................................................................................................................................... 56

Table 4.35. Optional Front Flat Terminations ............................................................................................................................. 56

Table 4.36. Cluster ..................................................................................................................................................................................... 57

Table 4.37. Cluster Pad ........................................................................................................................................................................... 58

Terminations for DC Switches UL 489B .................................................................................................................................................. 59

Figure 4.35. Terminations for DC Switches UL 489B .............................................................................................................. 59

Remote Racker .............................................................................................................................................................................................. 59

Table 4.38. Remote Racker ................................................................................................................................................................ 59

Grounding/Earthing Device (IEC Only) ..................................................................................................................................................... 59

Table 4.39. Grounding/Earthing Devices (IEC Only .................................................................................................................. 59

Rejection Device .................................................................................................................................................................................................. 59

.............................................................. 50

DET-653C EntelliGuard® G Circuit Breaker Application Guide

SECTION 5 – CATALOG NUMBERING GUIDE

SECTION 6 – APPLICATION DATA

SECTION 7 – PHYSICAL DATA

SECTION 8 – STANDARDS AND REFERENCES

24-May-12 Table of Contents

EntelliGuard G ANSI/UL489 Circuit Breaker Catalog Number Guide ....................................................................................... 60

EntelliGuard G Cassette Catalog Number Guide ................................................................................................................................ 68

EntelliGuard TU Trip Unit for EntelliGuard G Breaker ....................................................................................................................... 70

EntelliGuard TU Trip Unit Rating Plugs ..................................................................................................................................................... 72

Key Features .......................................................................................................................................................................................................... 73

UL1066 Low Voltage Power Circuit Breakers ............................................................................................................................. 73

UL498 Stored Energy Insulated Case Circuit Breakers .......................................................................................................... 73

IEC rated Circuit Breakers for IEC Equipment and Applications ....................................................................................... 73

All Types .......................................................................................................................................................................................................... 73

Ratings and Sizes ................................................................................................................................................................................................ 73

Short Circuit Interrupting Ratings ............................................................................................................................................................... 74

Figure 6.1. Short Circuit Rating Adjustment Equation ............................................................................................................ 74

Table 6.1. First Half-Cycle Peak at Specific Fault X/R Ratios ............................................................................................... 74

Withstand Ratings, Selective Adjustable-, RELT- and Override-Instantaneous Protection ......................................... 74

Close and Latch Ratings and Making Current Release (MCR) Instantaneous Trip............................................................ 75

Table 6.2. EntelliGuard G Circuit Breaker Close and Latch Ratings, UL489 Listed .................................................. 75

Table 6.3. EntelliGuard G Circuit Breaker Close and Latch Ratings, UL1066 Listed................................................ 75

Table 6.4. EntelliGuard G Non-Automatic Switch Close, Latch, and Withstand Ratings, UL489 Listed ....... 76

Operations .............................................................................................................................................................................................................. 76

Table 6.5. Operational Ratings, UL489 Circuit Breakers ........................................................................................................ 76

Table 6.6. Operational Ratings, UL1066/ANSI Circuit Breakers ......................................................................................... 76

Selecting a Circuit Breaker for an Application ..................................................................................................................................... 76

Cable or Bus Size – Factor A .......................................................................................................................................................................... 76

Ambient Temperature – Factor B ............................................................................................................................................................... 77

Table 6.7. Ambient Temperature Rating – Factor B ................................................................................................................. 77

Operating Frequency – Factor C ................................................................................................................................................................. 77

Altitude – Factor D .............................................................................................................................................................................................. 77

Table 6.8. Altitude Rating – Factor D................................................................................................................................................ 77

Load Class Rating – Factor E ......................................................................................................................................................................... 77

Table 6.9. Load class Rating – Factor E .......................................................................................................................................... 78

Safety – Factor F .................................................................................................................................................................................................. 78

Other Factors that Influence Circuit Breaker Sizing 100% vs. 80% Ratings ........................................................................ 78

Table 6.10. Circuit Breaker and Trip Parameters ......................................................................................................................

Dimensional Drawings ..................................................................................................................................................................................... 79

Figure 7.1. Sample Dimensional Drawing: ANSI UL 489, 3Pole, Drawout, 2000A, Type E, M ............................. 79

Dimensional Drawing Index .......................................................................................................................................................................... 80

Table 7.1. Dimensional Drawing Index ........................................................................................................................................... 80

Dimensions .......................................................................................................................................................................................................... 81

Table 7.2. 3-Pole, UL/ANSI ..................................................................................................................................................................... 81

Table 7.3. 4-Pole, UL/ANSI ..................................................................................................................................................................... 81

.................................................................................................................................................................... 82

Publications .......................................................................................................................................................................................................... 85

DET-653C EntelliGuard® G Circuit Breaker Application Guide

EntelliGuard® G Power Circuit Breaker Section 1. Introduction

Table 1.1. Device Standards and References (See Section 8 for Details)

ANSI® Certified

UL® Listed

IEC® Rated

IEC® Extreme Atmospheric Conditions

Low-Voltage

Insulated Case

Circuit Breaker

IEC 68-2-1: Dry cold at -55°C

Power Circuit

Circuit Breaker

IEC 60947-1

IEC 68-2-2: Dry heat at 85°C

Breaker

UL 489

Photovoltaic

IEC 60947-2

IEC 68-2-30: Damp heat (temp. 55°C, rel. humidity 95%)

C37.13

NEMA AB1

C37.16

C37.17

C37.20

C37.50

UL 1066

NEMA SG3&5

Table 1.2. Device Ratings

Standard

Sensors Available

Envelope 1

Envelope 2

Envelope 3

ANSI/UL

400A - 2000A

400A - 3200A

3200A - 5000A

UL 489

400A - 2000A

400A - 3200A

3200A - 6000A

IEC

400A - 2000A

400A - 4000A

3200A - 6400A

24-May-12 Section 1. Introduction

EntelliGuard G circuit breakers are the newest line of low voltage power circuit breakers (LVPCBs) evolved from the exceptional designs and practices of GE legacy breakers. EntelliGuard G breakers offer a truly global product platform that meets industry standards throughout the Americas, Europe and Asia (ANSI, UL, CSA, IEC, Lloyds Register of Shipping, etc.).

Breakers are available to OEMs in 3- and 4-pole designs from 400A to 6400A (IEC) with fault interruption ratings up to 150kA. New, state-of-the-art EntelliGuard Trip Units enable the breakers with advanced technology that provides system protection, local and remote monitoring, relaying and communications. EntelliGuard Trip Units may be supplied with either Modbus or Profibus communications protocols. The breaker-trip unit system delivers superior circuit protection without compromising selectivity or arc flash protection. The EntelliGuard system is yet another evolution of GE’s core competencies in reliable electric power distribution, circuit protection and arc flash protection.

EntelliGuard G 3-pole breakers are the standard in GE AKD-20 Low Voltage Switchgear. The breakers are suitable for 280Vac, 480Vac and 600Vac applications, and they provide advanced circuit protection, limit arc fault energy and preserve system coordination without sacrificing any of these critical functions (Table 1.1).

UL489B DC for

IEC 60947-3 IEC 68-2-52 Level 2: salt mist

CSA 22.2 NO 5.1

EntelliGuard G devices are available in all standard, 100% rated, ANSI, UL and IEC ratings in both fixed and draw-out designs. Standard devices are also offered in 4 pole designs. No compromise (e.g., derating) is necessary in the system protection scheme as the EntelliGuard G Neutral poles are fully rated. Front and rear access connections are available, and all configurations can be manually or electrically operated with multiple and redundant accessories (optional) (Table 1.2).

EntelliGuard G short circuit and interrupting ratings are given in Tables 1.3 through 1.6.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 1.3. ANSI/UL1066 Ratings

Interrupting Rating Tier ANSI/UL1066 Devices, LVPCB

Envelope 1

Envelope 2

Envelope 3

Type

254V

508V

635V

1/2S

Withstand

400, 800,

1200

400, 800,

1600,

2000

3200

400-3200

3200

4000-

5000

65,000

X X

85,000

65,000

100,000

65,000

85,000

100,000

85,000

100,000

150,000

100,000

Table 1.5. Non-Automatic Circuit Breaker – ANSI Version Ratings

Envelope

Type

Amps

Rated

Interrupting

Rated Endurance

Current

Minimum

Mechanical

Minimum

Electrical

Minimum Electrical

Endurance

Endurance

at 480V

Endurance

at 600V

1 N 800

12,500

10,000

7,500

1 N 1600

12,500

10,000

7,500

1 N 2000

12,500

7,500

5,000

2 M 3200

5,000

3 B 4000

100

5,000

3,000

2,000

3 B 5000

100

5,000

2,000

1,500

Table 1.4. UL489 Ratings

Interrupting Rating Tier UL489 Devices, ICCB

Envelope 1

Envelope 2

Envelope 3

Type

240V

480V

600V

1/2S

Withstand

4001200

400-

2000

2500-

3000

400-

3000

3000

4000

5000-

6000

65,000

50,000

42,000

100,000

65,000

50,000

24-May-12 Section 1. Introduction

65,000 65,000 50,000 50,000 X

65,000 65,000 65,000 42,000 85,000 85,000 65,000 50,000

100,000 100,000 100,000 65,000

150,000 150,000 100,000 85,000

800

12,500 10,000 7,500

X X X

X X

• GE internal quality testing requirements exceeded 20,000 mechanical and electrical operations.

DET-653C EntelliGuard® Circuit Breaker Application Guide

Table 1.6. Non-Automatic Circuit Breaker/Molded Case Switch – UL Version Ratings

Envelope

Type

Amps

Short

Interrupting

Rated Endurance

Current (kA)

Minimum

Mechanical

Minimum

Electrical

Minimum Electrical

Endurance

at 480V

Endurance

at 600V

1 S 800

12,500

10,000

7,500

1 N 1600

12,500

10,000

7,500

1 N 2000

12,500

7,500

5,000

3 B 5000

100

5,000

3,000

1,500

3 B 6000

100

5,000

1,500

1,000

Table 1.6b UL489B Ratings "Suitable for use in Photovoltaic system in accordance with article 690 of the NEC"

Envelope

Type

Amps

Short

Interrupting

Rated Endurance

Current (kA)

Minimum

Mechanical

Endurance

Minimum Electrical

Endurance

at 600V

Minimum Electrical

Endurance

at 1000V

800 -

3000

12500

500

Altitudes and Closing Times

Dimensions and Weights

24-May-12 Section 1. Introduction

1 1

2 3

• GE internal quality testing requirements exceeded 20,000 mechanical and electrical operations.

1200

12,500 10,000 7,500

800 42 12,500 10,000 7,500

3000 65 5,000 5,000 5,000 4000 100 5,000 3,000 2,000

4 Configurations available for 600V DC and 1000V DC with or without isolating both DC legs. See Page 59 for Bus Bar Configurations.. Note: Bus Bars must be ordered separately. Time Constant (L/R) = 15msec, Rated calibration temperature 50 degree C

See Section 7, Tables 7.2 and 7.3.

See Section 7.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

EntelliGuard® G Power Circuit Breaker Section 2. Features and Characteristics

Figure 2.1. EntelliGuard G Features and Characteristics

24-May-12 Section 2. Features and Characteristics

DET-653C EntelliGuard® G Circuit Breaker Application Guide

STANDARD AND OPTIONAL FEATURES

Short Time Rating (1/2 Sec)

Short Circuit/High Interruption Rating

Thermal Performance

Reverse Feed

Two-Step Stored Energy Mechanism

Field Installable Trip Units and Accessories

Table 2.1 Enclosure Requirements

Minimum

Space (inches)

Vent Slots (a)

Frame Size

No. of Poles

W H D

Top Wall

Bottom Wall

Rear Wall

1200A (Env 1)

16.4

16.5 2000A (Env 1)

16.4

16.5 2000A (Env 1)

16.4

16.5 3000A/3200A (Env 2)

16.5 6000A (Env 3)

16.5

24-May-12 Section 2. Features and Characteristics

42KA, 50KA, 65KA (Env 1); 85KA (Env 2), 100KA (Env 3)

65K - 150KA @ 508V and below, 65K - 100KA @ 635V

ANSI C37 and UL 489 designs are 100% rated up to 40ºC when

applied in recommended enclosure sizes. IEC 60947 versions are 100% rated in free air up to 50ºC. IP31 enclosure/switchboard rating is based on size, recommended up to 50ºC ambient with rear vertical bus connection (Table 2.1).

EntelliGuard G devices can be fed from top or bottom terminals.

EntelliGuard G operates via stored energy mechanisms that can

Specified Cubicle

Minimum Specified Cubicle Ventilation - No of

be manually charged (MO) or electrically charged (EO) by the Spring Charging Motor. Closing time is less than five cycles. Closing and opening can be initiated remotely or via the front cover push buttons. An Open-Close-Open cycle is possible without recharging. (Charge after close). The breaker operating mechanism is a trip-free mechanism and is furnished with an integrated anti-pumping system.

EntelliGuard G devices have provisions for four accessory

operating coils. The four positions can be filled by the following four devices: one Close Coil (CC) or one Command Close Coil (CCC), one Shunt Trip Coil (ST), one Under Voltage Release (UVR), and the fourth position can either be a 2nd ST Coil or a UVR. The Shunt Trip and the UVR can also be replaced with a 120V Network Interlock Device. The closing coil is a “one-shot” electronic closed circuit. Shunt trip (ST) coils are continuous rated. (Note: No Red Indicating Light on Shunt Trip) Under voltage relays (UVR) are available with a fixed time delay (3 Cycles at down to 50% system voltage; 1.2 Cycles below 50% system voltage). The time delay module (TDM) is available as a shipped loose accessory for remote installation (in equipment). Optional Coil Signaling contact modules for the CC, CCC, ST, UVR, and NI's provide coil status (energize/de-energize) via the secondary disconnects or trip unit through Modbus or Profibus Comm.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Coils

Breaker/Main Contact Status

Motor Operator

Electrical Closing Button

Ready to Close Indicator

Mounting Straps/Accessories

Auxiliary Switches

Interlocks

24-May-12 Section 2. Features and Characteristics

EntelliGuard G devices have provisions for four accessory

operating coils. The four positions can be filled by the following four devices: one Close Coil (CC or CCC), one Shunt Trip Coil, one UVR (Under Voltage Release), and the fourth position can either be a Shunt Trip Coil or a UVR. The closing coil is a “one-shot” electronic closed circuit. Shunt trip (ST) coils are continuous rated. Under voltage relays (UVR) are available with a fixed time delay (50ms at down to 50% system voltage; 20ms below 50% system voltage). The time delay module (TDM) is available as a shippedloose accessory for remote installation (in equipment). Optional status contact modules for the ST, CC and UVRs provide coil status (energize/de-energize) via the secondary disconnects and trip unit.

Heavy duty, motor/gearbox unit; easily accessible with a full

Four available designs:

Standard interlocks include:

OPEN/CLOSED, ON/OFF indication is provided on the front cover.

range of voltages.

Located on the front cover between the Open and Close button;

used to electronically close the breaker when a Command Close Coil is selected.

Provides visible indication/readiness for close operation.

Kits are available to mount and connect fixed/stationary breakers

in either a rear connected (Vertical) or a front flat connected.

• Power rated (3NO+3NC) (Standard)

• Power rated (3NO+3NC) + low signal (Hi-Fi) (2NO+2NC)

• Power rated (8NO+8NC)

• Power rated (4NO+4NC) + low signal (Hi-Fi) (4NO+4NC)

• Drawout Breaker: prevents the breaker from being closed

unless it is in the TEST or CONNECT positions

• Drawout Breaker/Main Contacts: prevents withdrawal/removal of the breaker unless the main contacts are OPEN. Access to the drawout mechanism racking screw is blocked when the breaker is CLOSED.

• Spring Discharge Interlock: Automatically discharges the closing springs when the breaker is moved from the DISCONNECT to the WITHDRAWN position. This prevents withdrawing a breaker from the cubicle with the closing springs charged.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Breaker Status Indicators

Rejection Feature

Through-Door Racking

Padlocking Devices

Key Interlock

Shutters

Carriage Position Switch

Lifting Beam

IP Covers

Mechanical Counter

24-May-12 Section 2. Features and Characteristics

A factory-installed rejection feature prevents mismatching

Up to four optional key interlocks are available (Kirk, Ronis,

Optional lockable shutters are available (factory installed).

Optional Lifting Beams/bars with separate slings are available for

Optional IP54 covers (protects against harmful amounts of dust

Standard Indicators include:

• The breaker status indicator shows the condition of the main contacts (OPEN, CLOSED).

• The status of the closing springs is indicated as CHARGED or DISCHARGED.

• The draw-out position indicator displays whether the breaker is in the CONNECT, TEST or DISCONNECT position.

• The breaker also includes a switch that provides main contact status indication to the POWER LEADER™ Power Management System.

• The optional Reduced Energy Let-Through (RELT) is provided with an ON/OFF contact closure to positively indicate whether the RELT setting is enabled or not.

breakers and cassettes/substructures. This prevents (a) inserting a breaker with a lower interrupting rating into a higher rated cassette/substructure and (b) inserting a higher current rated breaker into a lower rated cassette/substructure.

The breaker racking mechanism is accessible through the front of

the cassette and permits safely disconnecting/withdrawing the circuit breaker without opening the door and exposing personnel to live parts during the process.

The padlocking device is standard on breakers and allows up to

three padlocks with 1/4" to 3/8" diameter shanks to secure the breaker in the OPEN/TRIP FREE position. A padlock provision on the front panel of the cassette/substructure permits locking access to the racking screw. Racking access can be locked with the breaker in the CONNECT, TEST, DISCONNECT position with up to three padlocks.

Profalux, Castell). Switchgear applications utilize a Kirk key interlock mounted in the cassette. A maximum of two key interlocks may fit in the cassette.

This optional cassette/substructure device permits local or

remote indication of the circuit breaker status (CONNECTED, TEST, DISCONNECTED), 2NO/2NC single pole, double throw contacts are available for each position.

all breaker sizes. A Universal Lifting Beam is also available capable of lifting a 3 Pole Envelope 1

and splashing water) are available for all breaker sizes.

Provides local record of the cumulative number of complete

breaker closing operations.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Cable Interlocks (OEM Applications Only)

Bell Alarm Contact

24-May-12 Section 2. Features and Characteristics

Available with or without a mechanical lockout feature, the bell

Available for fixed and draw-out breakers, these units enable

direct interlocking of EntelliGuard G circuit breakers.

alarm operates whenever the breaker trips due to a protective function (electrical fault).

DET-653C EntelliGuard® G Circuit Breaker Application Guide

EntelliGuard G Power Circuit Breaker Section 3. EntelliGuard TU Trip Unit System

Introduction

Reliability without Compromising Protection

Arc Flash and the EntelliGuard TU Trip Unit

24-May-12 Section 3. EntelliGuard TU Trip Unit System

The EntelliGuard TU Trip Unit offers optimum circuit protection and optimum system reliability simultaneously with little or no compromise to either of these critical functions. Reliability and arc flash protection, in one package, at the same time, all the time.

EntelliGuard TU series trip units are available as the standard controller for new production EntelliGuard G ANSI/UL 1066, UL 489 and IEC circuit breakers. EntelliGuard TU designs are also available as direct, functional replacements for GE's PowerBreak, PowerBreak II, WavePro, AKR, and AK circuit breakers. EntelliGuard TU trip units are also available in kit form for many popular non-GE and older GE low voltage power circuit breakers (Refer to DEH-4567). The EntelliGuard® TU technology is also available in GE's molded case Spectra Breaker line 400A-1200A. The Spectra MET (microEntelliGuard) includes the innovative RELT and Zone Selective Interlocking- Instantaneous feature. New, onboard features and communications capabilities enable equipment enhancements, improved operational performance and life extension programs. Performance will vary based on associated circuit breaker and equipment conditions. All EntelliGuard TU Trip Units are Conformal Coated for increased reliability in humid/damp environments.

This section describes the functions as implemented in the EntelliGuard G UL 489 and ANSI/UL 1066 circuit breakers. References or comparisons to other GE circuit breakers are for informational purposes only.

Reliable protection of circuits and equipment has always been the circuit breaker’s primary mission. Providing appropriate protection of the conductors, while preserving selective coordination, has been the primary focus of most system designers. However, what was acceptable in the past is no longer the standard today.

Modern economic reality, coupled with strict regulatory requirements, demand optimal system performance with increased sensitivity to the inherent power system hazards that face operating and maintenance personnel. Safety agencies, local authorities and owner-operators demand better personnel protection and state-of-the-art capabilities to minimize hazards while simultaneously preserving critical loads and system capabilities.

These requirements often seem to be, and sometimes are, in conflict, pitting the speed and sensitivity required to improve arc flash protection against the delays and deliberate decision making required to maximize power system reliability. The EntelliGuard TU, along with the EntelliGuard family of circuit breakers, offers flexible solutions for demanding circuit protection and circuit preservation environments. The EntelliGuard TU is designed to provide the utmost in system protection and reliability simultaneously, with little or no compromise.

Reducing arc flash hazard is a primary concern in many power system designs. The best way to ensure the lowest possible hazard for a particular distribution system is to consider the hazard as the system is designed and make careful selection of the system’s topology, circuit sizes, equipment sizes and protective devices to minimize hazard for the operating and maintenance personnel that will need to use the system for years to come.

The EntelliGuard TU, especially in conjunction with the EntelliGuard G circuit breaker, provides significant flexibility towards solving arc flash hazard problems without excessive sacrifice of system reliability, in terms of selectivity.

The next three to four pages are an overview of the EntelliGuard TU's unique features enabling Arc Flash mitigation and selectivity at the same time. When the downstream breaker/fuse is current limiting, the Waveform Recognition Selective Instantaneous is used to achieve lower Instantaneous pickup settings while maintaining selectivity. This is very effective for 250A and below devices. For Feeder devices above 250A, the Instantaneous Zone Selective Interlocking (I-ZSI) feature is used to achieve selectivity and arc flash mitigation at the same time. The I-ZSI feature is available on Spectra MET and EntelliGuard® TU in the following breakers: EntelliGuard G, Power Break II, WavePro, AK/AKR, and Conversion Kits. By combining the Waveform Recognition Selective Instantaneous and I-ZSI, a system with a 100KAIC bolted fault current can achieve a 8 cal/cm2 or less incident energy level.

One way to lower potential incident energy is to ensure that circuit breakers are able to interrupt using their Instantaneous trips for all expected arcing faults. Figure 3.1 shows the expected arcing currents for 480V systems for various arc gaps representative of switchgear (32mm), switchboards (25mm), MCCs (25mm) and panelboards (13mm). These values were determined using IEEE standard 1548, Guide for Performing Arc-Flash Hazard Calculations,

2002.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Figure 3.1. Arcing Current

Selectivity with Molded Case Circuit Breakers and Other Devices

Figure 3.2. Selectivity Curve

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

Figure 3.1 demonstrates the wide range of possible arcing currents predicted by the IEEE standard’s calculations. The actual arcing currents may be lower or higher when consideration is given to the potential error in short circuit calculations, fault current data provided by the utility company, and variance in the actual arcing gap or enclosure’s geometry where the arc occurs. Of particular concern should be the lower end of the possible range of current that may fall below the Instantaneous pickup of a circuit breaker or the current limiting threshold of a fuse. Dangerous incident energy may quickly increase when interruption time increases from a few cycles to a few seconds, even for low arcing current.

The EntelliGuard TU trip unit’s Waveform Recognition Selective Instantaneous provides a unique selectivity capability. When used in conjunction with current limiting devices downstream, the trip unit may be set low, and still maintain significant levels of selectivity. Table 3.1 lists the minimum instantaneous setting above specific GE circuit breakers and the levels of selectivity achieved. Testing and documentation of the selectivity capability of the EntelliGuard Trip unit will be expanded as more test data becomes available. Always consult GE Selectivity reference publication DET-537 for the latest information or contact your GE sales representative for up to date information.

Selectivity above current limiting fuses may also be expected. The required minimum setting may be estimated by examining the peak let-through curve for the fuse. Find the peak let-through current value that is 1.41 times the prospective RMS current. The trip unit should be set such that the instantaneous pickup is above that peak value. The

circuit breaker and fuse may then be selective up to the values identified in Table 3.1. The fuse and circuit breaker combinations have not been tested so performance cannot be guaranteed at this time; however, selectivity is expected for arcing and bolted faults up to the values indicated in the above selectivity table.

Protection between circuit breakers using the EntelliGuard TU trip unit may be further improved using zone selective interlocking. The trip unit’s unique instantaneous zone selective interlocking which can increase selectivity for UL 489 EntelliGuard G mains while allowing to trip instantaneously for faults within their zone of protection allows significant selectivity and arc flash protection at the same time.

Selectivity for an EntelliGuard TU ground fault function and a circuit breaker below may be enhanced by the trip unit’s selective ground fault function and zone selective interlocking. Figure 3.2 demonstrates an 800A circuit breaker under a 1200A ground fault set to be fully selective. See also Tables 3.2 and 3.3.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.1. EntelliGuard Selectivity Above GE Current Limiting Circuit Breakers

Load side (branch)

devices

Wavepro,

override

Record Plus G

600A

Record Plus G

400A

Record Plus G

250A

Record Plus E

250A

Record Plus E

150A

Record Plus E

100A

Record Plus E

60A

Record Plus E

30A

Record Plus

B/C

Spectra G

600A

Spectra G

400A

Spectra G

250A

Spectra F

250A

11,200A (2)

Spectra E

150A

9,600A (2)

TECL

3 & 7A

800A (1)

TECL

15A

850A (1)

TECL

30A

1,800A (1)

TECL

50A

3,800A (1)

TECL

100A

7,300A (1)

TECL

150A

11,000A (1)

TEY/TEYF

15-100A

9,900A (1)

14,000A

THQL (240V)

15-60A

9,900A (1)

10,000A

THHQL

(240V)

24-May-12 Section 3. EntelliGuard TU Trip Unit System

Selectivity between any line side (main)Circuit Breaker with a GE EntelliGuard TU trip unit and a load side (branch) GE current limiting circuit breaker, and certain lighting panel type circuit breakers is determined based on the setting of the line side EntelliGuard TU Trip. When the line side EntelliGuard TU Trip unit is set at the value defined in the table or higher the pair is selective over the instantaneous range of the upstream CB up to the limit defined in the table below. The required settings are independent of the line side circuit breaker type and only depend on the load side current limiting circuit breaker. The table below identifies the values for GE's currently produced UL listed current limiting molded case circuit breakers.

Extent of selectivity will depend on line side circuit breaker type. The table below describes how that selectivity is limited by circuit breaker type.

The table below applies at 208 through 480 Volts except where specifically limited to 240V and lower.

Line side (Main) device with EntelliGuard TU trip unit

Frame

Designation

Maximu

m Trip (frame

sensor)

EntelliGuard TU

instantaneous

setting must be

> than (3)

20,350A

9,900A (1)

100A 7,190A

29,980A

PowerBreak

II, UL 489 CB

Up to short circuit rating; 65kA, 100kA

or 150kA at

480V, and

200kA at

240V

AKR or AK,

or other

ANSI CB

without a

mechanical

Up to short circuit rating; 65kA, 100kA

or 150kA at

480V.

EntelliGuard G, UL489 CB

Up to

withstand

rating; 42kA,

50kA, 65kA,

85kA or

100kA at

480V

EntelliGuard

G, ANSI CB

Up to

withstand

rating; 65kA,

85kA or

100kA at

480V

Notes:

1. EntelliGuard TU must employ a 400A rating plug or larger

2. EntelliGuard TU must employ an 800A rating plug or larger

3. Any instantaneous overlap seen in time current curves when line side CB is set per table does not indicate a lack of selectivity and may be ignored.

15-60A 9,900A (1) 22,000A 22,000A 22,000A 22,000A

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.2. Maximum Instantaneous Pickup Multipliers for GE Circuit Breakers

Line side device with Entelliguard TU Trip Unit

PowerBreak II,

UL 489 CB

WavePro or AKR,

ANSI CB

EntelliGuard G,

ANSI/UL Std I

EntelliGuard G, ANSI Ext I

Max Instantaneous in X

800A frame

1600A frame

3000A frame

N/A

3200A frame

N/A

6000A frame

N/A

16 Amperes

Amperes

2000A frame, 2000A plug

30,000

60,000

2500A frame, 2500A plug

32,500

N/A

37,500

75,000

4000A frame, 4000A plug

40,000

52,000

60,000

92,000

5000A frame, 5000A plug

N/A

65,000

75,000

95,000

Maximum instantaneous is a multiple of rating plug, the above values may be lower if a smaller rating plug than maximum for frame is used. In PB2 & WavePro CB maximum instantaneous multiplier is limited by frame rating. In Entelliguard G the maximum Instantaneous X may be limited by circuit breaker withstand or short time rating (also known as Icw).

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

• Instantaneous selectivity between a circuit breaker with an EntelliGuard TU trip Unit and any non-current limiting circuit breaker may be evaluated via

traditional time current curve analysis or simply multiplying the upstream instantaneous trip setting by .9 which accounts for the tolerance of the line side circuit breaker around the nominal setting. If The EntelliGuard TU's Instantaneous zone selective interlocking capability between similarly equipped circuit breakers is employed then selectivity up to the upstream circuit breaker's full withstand or short circuit rating is possible.

The table below identifies maximum instantaneous pickup multipliers possible for various types and sizes of GE circuit breakers. Lower part of table identifies the maximum instantaneous pickup in amperes for various circuit breaker, sensor and rating plug combinations.

Frame

determines

maximum

instantaneous

pickup (X) for PB2

and WP CB.

Plug/Icw ratio

determines

maximum

possible for

EntelliGuard G

CB. EntelliGuard

values shown are

more maximum

withstand tiers.

2000A frame 15 15 15 30 2500A frame 13 N/A 15 30

4000A frame 10 10 15 23 5000A frame N/A 7 15 19

800A frame, 800A plug 12,000 12,000 12,000 24,000

1600A frame, 1600A plug 24,000 24,000 24,000 48,000

3000A frame, 3000A plug 39,000 N/A 45,000 90,000 3200A frame, 3200A plug N/A 41,600 48,000 96,000

6000A frame, 6000A plug N/A N/A 90,000 96,000

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.3. Selectivity with EntelliGuard TU Trip Units in ANSI and ICCB/ Power Break II Circuit Breakers

Downstream device with EntelliGuard TU Trip Unit

Power Break II, UL 489 CB

WavePro or AKR, ANSI CB

EntelliGuard G, ANSI/UL Std I

EntelliGuard G, ANSI Ext I

Max Instantaneous in X

800A frame

1600A frame

2000A frame

3000A frame

N/A

3200A frame

N/A

4000A frame

5000A frame

N/A 7 15

6000A frame (UL 489 only)

N/A

N/A Amperes per above multipliers

800A frame, 800A plug

12,000

24,000 1600A plug

2000A frame, 2000A plug

30,000

60,000 3000A plug

3200A frame, 3200A plug

N/A

41,600

48,000

96,000 4000A plug

5000A frame, 5000A plug

N/A

35,000

75,000

95,000

6000A plug

24-May-12 Section 3. EntelliGuard TU Trip Unit System

Frame determines maximum instantaneous pickup (X) for PB II and WP CB. Plug/Icw ratio determines maximum possible for EntelliGuard GCB. EntelliGuard values shown are more maximum withstand tiers.

1600A frame,

3000A frame,

24,000

39,000

24,000

N/A 45,000

48,000

90,000

4000A frame,

6000A frame,

• Maximum instantaneous is a multiple of rating plug. The above values may be lower if a smaller rating plug than maximum for frame is used. In PB II &

WavePro circuit breakers, the maximum instantaneous multiplier is limited by frame rating. In EntelliGuard G, the maximum Instantaneous X may be limited by circuit breaker withstand or short time rating (also known as Icw). The current numbers above multiplied by 0.9 provide maximum selectivity above non-current limiting if instantaneous is adjusted to maximum and no zone selective interlocking is used.

40,000

60,000

N/A N/A 90,000

92,000

N/A

Note: For complete listing of all selectivity functionalities see publication DET-537D

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Above Downstream Feeders

The Waveform Recognition Selective Instantaneous

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

The EntelliGuard TU trip unit has Short Time bands under 100msec designed to optimally fit above the Instantaneous clearing times of various GE circuit breakers. Table 3.4 lists the suggested Short Time band that may be used above specific GE circuit breakers for the fastest coordination and consequently fastest EntelliGuard G circuit breaker interruption.

Also listed is the Hazard Risk Category for various available fault currents calculated at the listed Short Time band clearing times and Instantaneous clearing times provided by the EntelliGuard TU trip unit’s Waveform Recognition Selective Instantaneous and its Reduced Energy Let-Through (RELT) Instantaneous trip. The Hazard Risk Category (HRC) levels shown are calculated for a solidly grounded, 480V system, 32mm arc gap, 18 in. working distance and arc in box. Using the optimized Short Time band allows the system to stay at HRC2 most of the time and always less than HRC4. However, use of the RELT Instantaneous trip allows the system to protect at HRC1 or 2 for available fault currents as high as 90kA.

The Instantaneous algorithm in the EntelliGuard TU trip unit will allow a large switchboard or switchgear circuit breaker to be set low yet maintain selectivity. For example, when set to protect the conductors to a motor control center, an 800A feeder circuit breaker’s Instantaneous may be set as low as 8kA nominal. This should provide complete selectivity above the typical 150A and smaller circuit breakers or fuses found in a motor control center.

Allowing for 10% pickup tolerance in the Instantaneous pickup of the feeder circuit breaker would indicate that the feeder would pickup Instantaneously for arcing fault currents approximately 9kA or higher. From Figure 3.1 it can be seen that fault currents of 20-25kA and higher would seem to reliably produce arcing current above 9kA in a variety of configurations. From Table 3.4 it can be seen that an EntelliGuard G circuit breaker clearing instantaneously can maintain HRC1 in a system with up to 42kA available and HRC2 in systems with up to 100kA available – excellent arc flash protection and selectivity simultaneously!

Note: These incident energy calculations do not take into account motor contribution or other factors that may affect expected levels of incident energy or hazard. For a thorough understanding of the incident energy available or HRC in a power distribution system, an Arc Flash Study should be conducted by engineering personnel qualified to provide such analysis.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.4. Minimum Selective Clearing Times for an EntelliGuard G Circuit Breaker Above Selected GE Circuit Breakers, and Related HRC Levels at Various Fault Circuits

GE Molded Case Circuit Breaker Family

Circuit

Breaker

Type

Minimum

EntelliGuard TU

Short Time Band

Clearing

Time

480V, 32mm, 24in Working Distance,

Arc in a Box - HRC @ Ibf=

35kA

42kA

50kA

60kA

75kA

90kA

100kA

TM = Thermal Magnetic. E = Electronic.

AE = Adjustable Electronic. LP = Lighting Panel Application.

GP = General Purpose Application. MCP = Motor Circuit Protector).

HRC = Hazard Risk Category (See NFPA 70E.

Above Other Power Circuit Breakers

Terminology In:

HSIOC:

MCR:

ICW:

ICU:

24-May-12 Section 3. EntelliGuard TU Trip Unit System

FB, FC, TEY, THQL TM, LP 0.025sec 0.08sec 2 2 2 2 3 3 3 TED, TEC TM-GP, MCP 0.025sec 0.08sec 2 2 2 2 3 3 3 TF, TJ, TK TM-GP 0.025sec 0.08sec 2 2 2 2 3 3 3 Spectra E, F, G Frame E-GP 0.025sec 0.08sec 2 2 2 2 3 3 3 Spectra K Frame E-GP 0.033sec 0.088sec 2 2 2 2 3 3 3 Spectra G, K with MVT trip AE-GP 0.025sec 0.08sec 2 2 2 2 3 3 3 Record Plus G Frame E, AE-GP 0.042sec 0.097sec 2 2 2 2 3 3 3 Record Plus E Frame E-GP 0.033sec 0.088sec 2 2 2 2 3 3 3 Power Break with MVT AE-GP 0.058sec 0.113sec 2 2 2 3 3 3 3 Instantaneous Clearing Time RELT Clearing Time

instantaneous 0.050sec 1 1 1 2 2 2 2

RELT Instantaneous 0.042sec 1 1 1 1 2 2 2

Using the EntelliGuard TU trip unit’s unique Instantaneous Zone Selective Interlocking (I-ZSI), the main circuit breaker also can be set to interrupt selectively for faults in its zone of protection. However, the pickup level must be nested to prevent a nuisance trip at the main. Allowing for a 10% tolerance in the pickup current of both trips, the upper boundary of the main’s trip may be estimated at approximately 11kA. Again, Figure 3.1 shows that available fault currents above 25kA will generally produce arcing currents above 11kA. Table 3.4 shows a system with fault currents from 35kA to 100kA, the feeder and main circuit breaker will provide protection at HRC1 or HRC2 selectively above most circuit breakers using short time bands. Coordinated instantaneous settings would provide even better protection while still maintaining selectivity with select feeder breakers. To this capability one can add the RELT instantaneous setting that provides more sensitive and faster protection when needed.

Trip plug rating in amperes. This is the current rating of the rating plug installed in the trip unit. This is the maximum Long Time pickup a trip unit can have with a specific plug installed. A sensor can usually be applied with plugs between 37.5% or 40% to 100% of the sensor rating. Plugs are labeled in amperes.

X is a multiplier that may be applied in front of any rating value to denote a fraction of that rating. Example: The Long Time Pickup may be set at 0.5X of In.

High Set Instantaneous Overcurrent, also known as the Override. This is an Instantaneous protection setting applied near the circuit breaker’s withstand rating required to clear high magnitude faults quickly. In UL489 circuit breakers this is fixed; in UL1066 CBs the override may vary, if present at all.

Making Current Release. A setting provided with each trip unit, based on the specific circuit breaker size, used to protect the circuit against closing on high magnitude faults. The MCR function immediately trips/opens the circuit breaker if high magnitude fault current is sensed at the instant the circuit breaker is closed.

Short Circuit Withstand Rating of a particular circuit breaker in amperes. The withstand rating is defined differently within different standards, but it is always the value of current that a circuit breaker can withstand for some period of time without interrupting.

Short Circuit Interrupting Rating (ISC), or ultimate interrupting rating (ICU) in IEC terms. The maximum shortcircuit interrupting rating of a circuit breaker in amperes.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Long Time Protection

Thermal Long Time Overcurrent

Figure 3.3. Thermal Characteristic: Maximum and Minimum Long Time Delay Bands for a 1000A Long Time Pickup

Breaker Type

TCC

EntelliGuard G:

DES-090

WavePro, PBII, PBI, AK, AKR, Conv Kits

DES-095

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

The EntelliGuard TU offers two different shapes for Long Time protection curves. Each type of curve is available with 22 different time delays. The shapes may be described as

thermal type I

t characteristics and fuse shaped I4t lines. The nominal Long Time pickup is computed from the trip rating plug value (In) multiplied by the Long Time pickup setting. Long Time pickup setting multipliers are user settings and may range from 0.5 to 1.0 in increments of 0.05. The actual Long Time pickup is 112% of the nominal setting (Ir). 112% is to compensate for the Long Time Pickup Tolerance of ±10% that is drawing as “actual value/1+ tolerance)”. For a nominal 1000A Long Time pickup, the actual trip setting is 1120A, drawn as a vertical band between 1120/1.1 and 1120/0.9, or 1018A and 1244A.

The thermal I2t shape is similar to the typical curve of a thermal magnetic circuit breaker and matches the shape of many overcurrent devices used in industry today. The typical shape and range of settings may be seen in Figure 3.3. The range of time delays is shown in Table 3.5 at various multiples of nominal (100%) current setting. Drawn bands also include a mechanical constant time to account for circuit breaker operating and clearing time, which causes the slight widening of the band evident at the lower (right) end of the faster (lower) bands.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.4. Thermal Characteristic: Nominal Clearing and Commit Times for X Multipliers of Nominal Pickup

1.5

7.2

Commit

Clear

Commit

Clear

Commit

Clear

Commit

Clear

Commit

Clear

Min CB

4.25

8.04

0.139

0.239

0.072

0.137

0.050

0.104

0.038

0.080

C-2

12.7

24.1

0.417

0.656

0.215

0.352

0.149

0.253

0.095

0.172

C-3

25.5

48.1

0.83

1.28

0.430

0.674

0.298

0.476

0.190

0.315

C-4

34.0

64.1

1.11

1.70

0.57

0.89

0.40

0.62

0.254

0.410

C-5

51.0

96.2

1.67

2.53

0.86

1.32

0.60

0.92

0.38

0.60

C-6

67.9

128

2.22

3.4

1.15

1.75

0.79

1.22

0.51

0.79

C-7

84.9

160

2.78

4.2

1.43

2.18

0.99

1.52

0.63

0.98

C-8

102

192

3.33

5.0

1.72

2.61

1.19

1.81

0.76

1.17

C-9

119

224

3.89

5.9

2.01

3.03

1.39

2.11

0.89

1.36 C-10

136

256

4.44

6.7

2.29

3.46

1.59

2.41

1.02

1.55 C-11

153

289

5.00

7.5

2.58

3.89

1.79

2.71

1.14

1.74 C-12

170

321

5.56

8.4

2.87

4.32

1.99

3.00

1.27

1.93 C-13

204

385

6.67

10.0

3.44

5.18

2.38

3.60

1.52

2.31 C-14

238

449

7.78

11.7

4.01

6.04

2.78

4.19

1.78

2.69 C-15

272

513

8.89

13.4

4.59

6.90

3.18

4.79

2.03

3.07 C-16

306

577

10.0

15.0

5.16

7.76

3.58

5.38

2.29

3.45 C-17

340

641

11.1

16.7

5.73

8.61

3.97

5.98

2.54

3.83 C-18

374

705

12.2

18.4

6.30

9.47

4.37

6.57

2.79

4.21 C-19

408

769

13.3

20.0

6.88

10.3

4.77

7.17

3.05

4.59 C-20

442

833

14.4

21.7

7.45

11.2

5.17

7.76

3.30

4.97 C-21

476

898

15.6

23.4

8.02

12.0

5.56

8.36

3.56

5.35 Max CB

510

962

16.7

25.1

8.60

12.9

5.96

8.95

3.81

5.73

•

• Actual Long Time pickup is 112% of nominal pickup.

Fuse-Shaped Steep Long Time Overcurrent

Figure 3.4. Fuse Characteristic: Maximum and Minimum Long Time Delay Bands for a 1000A Long Time Pickup

Table 3.5.

Breaker Type

TCC

EntelliGuard G:

DES-091

WavePro, PBII, PBI, AK, AKR,

Conv Kits

DES-096

24-May-12 Section 3. EntelliGuard TU Trip Unit System

Algorithm will not commit below 1.5 cycles, clearing time will not be less than 0.08sec. Maximum LT curve is 15XLTPU for Envelope 1 and 2 devices, 10XLTPU for Envelope 3 devices.

The optional steeper fuse characteristic is a straight line

t shape for application in systems where fuses and

K=I circuit breakers are used together. Twenty-two different time bands are available in each trip unit.

Figure 3.4 displays minimum and maximum bands. Table 3.6 displays the nominal time delays for each of the 22 bands at various multiples of nominal current pickup.

Drawn bands also include a 30 ms constant time, which accounts for the slight widening evident in the time current curve at the lower (right) end of the faster (lower) time bands.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.6. Fuse Characteristic: Nominal Clearing and Commit Times for X Multipliers of Nominal Pickup

1.5

7.2

Commit

Clear

Commit

Clear

Commit

Clear

Commit

Clear

Commit

Clear

Min Fuse

0.675

1.51

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-2

1.96

4.37

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-3

3.56

7.95

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-4

5.57

12.4

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-5

8.07

18.0

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-6

11.2

25.0

0.025

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-7

15.1

33.7

0.028

0.080

0.025

0.080

0.025

0.080

0.025

0.080

F-8

20.0

44.7

0.038

0.084

0.025

0.080

0.025

0.080

0.025

0.080

F-9

26.1

58.3

0.049

0.110

0.025

0.080

0.025

0.080

0.025

0.080 F-10

33.8

75.4

0.064

0.142

0.025

0.080

0.025

0.080

0.025

0.080 F-11

43.3

96.7

0.082

0.182

0.025

0.080

0.025

0.080

0.025

0.080 F-12

55.3

123

0.104

0.232

0.028

0.080

0.025

0.080

0.025

0.080 F-13

70.2

157

0.132

0.295

0.036

0.080

0.025

0.080

0.025

0.080 F-14

88.9

198

0.167

0.374

0.045

0.100

0.025

0.080

0.025

0.080 F-15

112

251

0.211

0.472

0.057

0.127

0.027

0.080

0.025

0.080 F-16

141

316

0.266

0.595

0.072

0.160

0.035

0.080

0.025

0.080 F-17

178

397

0.335

0.748

0.090

0.201

0.043

0.097

0.025

0.080 F-18

224

499

0.421

0.940

0.113

0.252

0.055

0.122

0.025

0.080 F-19

280

626

0.528

1.179

0.142

0.317

0.068

0.153

0.028

0.080 F-20

352

785

0.663

1.479

0.178

0.397

0.086

0.192

0.035

0.080 F-21

441

984

0.830

1.853

0.223

0.498

0.108

0.240

0.044

0.098 Max Fuse

540

1204

1.017

2.269

0.273

0.610

0.132

0.294

0.054

0.120

• Actual Long Time pickup is 112% of nominal pickup.

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

• Algorithm will not commit below 1.5 cycles, clearing time will not be less than 0.08sec.

• Maximum LT curve is 15XLTPU for Envelope 1 and 2 devices, 10XLTPU for Envelope 3 devices.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Thermal Memory

Short Time Protection

Short Time Pickup

Short Time Bands

Figure 3.5. Short Time Pickup

Figure 3.6. Short Time Transition

24-May-12 Section 3. EntelliGuard TU Trip Unit System

The Long Time and Short Time pickup algorithm also includes a cooling cycle that keeps track of current if it oscillates in and out of pickup range. This Thermal Memory is also active in case the circuit breaker trips on Long Time or Short Time to account for residual heating in conductors. If a circuit breaker is closed soon after a Long Time trip or Short Time trip, a subsequent trip may happen faster than indicated by the time current curve due to the residual cable Thermal Memory effect. In trips without control power, the Thermal Memory is powered from the Trip Unit battery. The cooling algorithm requires up to 14 minutes to fully reset to zero.

The EntelliGuard TU provides a wide range of Short Time

pickup settings, I

t characteristics and time bands to optimize selectivity while not sacrificing clearing time unnecessarily. Short Time pickup settings range from 1.5 to 12 times the Long Time pickup setting for the EntelliGuard G circuit breakers in Envelopes 1 and 2. The maximum Short Time pickup for Envelope 3 is 10 times. In Power Break, WavePro, AKR and other circuit breakers, the maximum Short Time pickup may be lower. The transition between Long Time band and Short Time function may happen at the horizontal Short Time Delay Band rather than the vertical Short Time pickup, depending on the following:

• How fast or what type of Long Time band is chosen

• What Short Time pickup is selected

• What Short Time Delay is selected

An example of this may be seen in Figure 3.5 for the combination of Long Time Delay Band and Short Time Delay Band shown in Figure 3.6, any Short Time pickup setting larger than 6X will result in the Long Time band intersecting with the horizontal Short Time delay band rather the vertical Short Time pickup.

The EntelliGuard TU comes with a wide range of adjustable Time Delay Bands, ranging from a minimum of 25ms (clears in 80ms, 55ms for Sensing, Operating and Clearing Time) to 417ms (clears in 472ms). The bands are specially designed to pickup above various circuit breakers and trip systems to provide required selectivity while not sacrificing any more clearing time than required to provide the best possible arc flash protection.

The time bands are shown in Table 3.6 and Figure 3.7.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Table 3.7. Short Time Delay Bands

Label

Pickup

Clearing

Minimum

0.025

0.080

2nd

0.033

0.088

3rd

0.042

0.097

4th

0.058

0.113

5th

0.092

0.147

6th

0.117

0.172

7th

0.158

0.213

8th

0.183

0.238

9th

0.217

0.272 10th

0.350

0.405 Maximum

0.417

0.472 Figure 3.7. Short Time Delay

Table 3.8.

Breaker Type

TCC

EntelliGuard G:

DES-092

WavePro, PBII, PBI, AK, AKR, Conv

Kits

DES-097

Short Time I2t Slopes

Figure 3.8. Short I2t (In or Out)

Ground Fault Protection

Internal Residual Summation

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

Figure 3.8. The bands may be defined by the formula K = I where K equals 18, 8 and 2 times the nominal Long Time pickup squared. A 30msec fixed time is added to account for circuit breaker mechanical operation, clearing time and variance. Pickup tolerance is 10% of current.

The EntelliGuard Trip Unit offers three different Short Time I2t characteristics to allow optimized settings for selectivity and fast protection whenever possible. When using the EntelliGuard Trip Unit in systems that also employ older GE

MVT trip units, the EntelliGuard Trip Unit’s maximum I characteristic is equal to the Short Time I

t characteristic in

the MVT trip.

The position of the I

t slopes varies with the Long Time pickup of the respective circuit breaker. The intersection of the Short Time pickup and the Short Time delay band with

t slope varies with the Short Time pickup and time

the I delay band.

The three positions for the Short Time I

t band are shown in

The maximum (upper) Short Time I2t band may not be used with the minimum Long Time thermal band. Use of the fuse shaped Long Time bands also inhibits use of the Short Time

t bands. Only the definite Short Time pickup characteristic

I may be used with the fuse shaped Long Time curves.

The EntelliGuard TU trip unit offers the ultimate in Ground Fault protection. Each trip unit may be provided with the ability to accept a neutral sensor signal and generate an internal Zero Sequence phasor for Ground Fault protection. It may also be equipped with the ability to accept a Zero Sequence phasor signal from an external Zero Sequence CT or residual summation scheme using current transformers. Either Ground Fault method may be used to provide Ground Fault trip or Ground Fault alarm. Four pole circuit breakers may also provide Ground Fault protection based on an external Zero Sequence input signal or a residual sum of all four internal sensors.

The EntelliGuard TU trip unit uses internal air core sensors for current sensing, and the signals are residually summed using advanced digital electronics. A neutral sensor may be located remotely and connected to the trip unit. The connection is limited to 10m (33ft). Due to the air core sensor’s ability to handle a wide range of primary currents without distortion, Ground Fault sensing is accurate for a wide range of phase and current inputs.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

External Zero Sequence Input

Ground Fault Pickup Settings

Table 3.9. Ground Fault Time Delay Bands

Sensor

Minimum

Maximum

400

0.2

0.60

600

0.2

0.60

800

0.2

0.60 1200

0.2

0.60 1600

0.2

0.60 2000

0.2

0.60 2500

0.2

0.48 3000

0.2

0.40 3200

0.2

0.37 4000

0.2

0.30 5000

0.2

0.24 6000

0.2

0.20

Ground Fault Time Delay Bands

Table 3.10. Minimum Ground Fault Pickup and Clear Time

Setting

Power Break I & II,

AKR & WavePro

EntelliGuard G

Ground Fault Protection Curves

Figure 3.9. Ground Fault Characteristics

Instantaneous Protection

24-May-12 Section 3. EntelliGuard TU Trip Unit System

The EntelliGuard TU trip unit is able to accept input from an externally calculated Ground Fault current. The Ground Fault current may be derived using a single Zero Sequence CT or multiple phase CTs connected in a residual summation scheme. External CE marked Zero Sequence or ground return CTs are available for IEC applications, but are not UL Listed. Phase CTs used for a summation connection are UL Listed. Applications for this capability include sensing at the ground return connection for a transformer or generator as well as application in multiple source grounded systems.

All UL 489 and UL 1066 circuit breakers are limited to a maximum nominal pickup setting of 1200A per the National Electrical Code or 60% of the sensor size, whichever is lower. The minimum setting is 20% of sensor size. The available maximum settings per sensor may be seen in Table 3.8.

The EntelliGuard TU trip unit offers four different shapes for the ground fault function:

• Definite time with adjustable time delay.

• I

t slope with adjustable time delay.

• I

t slope (fuse shaped) with adjustable time delay.

• Selective double break I

The definite time and I traditional GF curve shapes. The I shape more in line with downstream fuses. GE’s unique selective double break I

t with adjustable time delay.

t characteristics provide the

t characteristic provides the most

t characteristic provides a

selective setting possible while still meeting the applicable UL and NEC standards. In many cases, an 800A circuit breaker may be used under a 1200A ground fault curve selectively (Fig. 3.9).

Ground Fault Time Delay Bands used in the EntelliGuard G circuit breakers range from 42msec to 942msec. In Power Break I, Power Break II, WavePro and AKR circuit breakers, the minimum GF Time Delay Band is 58msec and the maximum is 417msec.

The available minimum settings per circuit breaker type are shown in Table 3.9. The maximum Time Delay Band setting for all circuit breakers is 0.940sec with a 1sec clear.

The EntelliGuard TU trip unit may provide several types of Instantaneous protection, depending on the circuit breaker in which it is installed. The different types of Instantaneous protection are as follows:

• Adjustable Selective Instantaneous: Provided on Power

Break, Power Break II, WavePro, AK, AKR, Conv Kits and EntelliGuard G.

• Extended Range Adjustable Selective Instantaneous: An

available option on ANSI EntelliGuard G circuit breakers.

• High Set Instantaneous Overcurrent Trip: Provided on

Minimum pickup 0.058sec 0.042sec

Minimum clear 0.113sec 0.097sec

Maximum pick 0.417sec 0.940sec

Maximum clear 0.470sec 1.000sec

Power Break II and some EntelliGuard G circuit breakers, also called an override.

• Making Current Release (MCR): Provided on all EntelliGuard

G circuit breakers.

• Reduced Energy Let-Through Instantaneous Trip: An available option on Power Break, Power Break II, WavePro, AK, AKR, Conv Kits, and EntelliGuard G circuit breakers.

DET-653C EntelliGuard® G Circuit Breaker Application Guide

Adjustable Selective Instantaneous

Table 3.11. Maximum Adjustable Instantaneous Pick-up for EntelliGuard G Circuit Breakers with Normal or Extended Range Option

“In” (Plug

Rating, A)

Withstand Rating

100

Normal

Range

Extended

Range

Normal

Range

Extended

Range

Normal

Range

Extended

Range

Normal

Range

Extended

Range

Normal

Range

Extended

Range

150-2,000

N/A

2,200

N/A

2,400

N/A

2,500

N/A

3,000

N/A

3,200

N/A

3,600

N/A

4,000

N/A

5,000

N/A

6,000

N/A

Table 3.12. Time Current Curves

Breaker Type

TCC

EntelliGuard G: Selective

Instantaneous & RELT

DES-094

& RELT

DES-101

Power Break: Instantaneous

DES-099

Power Break II: Selective

Instantaneous and HSIOC (Override)

DES-100

24-May-12 Section 3. EntelliGuard

TU Trip Unit System

Each of these Instantaneous trips provides optimum protection, selectivity or both as required for different applications, subject to the capabilities of the respective circuit breakers in which the trip units are installed.

The EntelliGuard TU uses an exclusive algorithm, developed by GE, to recognize the wave shape of fault current within a cycle. With the improved analysis of the fault current wave shape, the trip unit allows the circuit breaker to trip immediately yet provide superior selectivity when used above current limiting circuit breakers or fuses. In many cases, the trip unit’s Instantaneous pickup may be set quite low yet allow for complete selectivity up to the circuit breaker’s full withstand level. For a list of possible selective combinations of GE circuit breakers employing the EntelliGuard TU trip unit and various downstream overcurrent devices, see GE publication DET-537.

The EntelliGuard TU trip unit can be furnished with one of two Instantaneous adjustment ranges. The standard adjustable range may be as high as 15X the trip plug value on all UL 489 or UL 1066 circuit breakers. An optional Extended Range Adjustable Selective Instantaneous, as high as 30X, may be provided for UL 1066 Listed Low Voltage Power Circuit Breakers (LVPCBs). LVPCBs also allow for this adjustable Instantaneous trip to be turned off. The minimum adjustable Instantaneous pickup setting for all circuit breakers is 2X the trip plug rating. The available maximum pickup settings are described in Table 3.10. The maximum Instantaneous pickup is limited by the circuit breaker’s withstand rating.

The Adjustable Selective Instantaneous will clear a fault in three cycles when used in 60Hz or 50Hz applications. Zone Selective Interlocking (I-ZSI) may be used with this Instantaneous function, allowing several breakers with overlapping Instantaneous protection to be selective with each other. Because each circuit breaker is set to trip Instantaneously for faults within their respective zones of protection, fast protection and selectivity are achieved simultaneously.

The special selective Instantaneous algorithm allows any circuit breaker above current limiting devices to be set with a relatively low Instantaneous pickup and still achieve significant selectivity. The system may be able to provide Instantaneous protection for most faults, including high impedance arcing fault, while maintaining significant levels of selectivity. Figures 3.11 and 3.12 later in this document

demonstrate the performance of the Instantaneous ZSI capability

Power CB: Selective Instantaneous

DET-653C EntelliGuard® G Circuit Breaker Application Guide

High Set Instantaneous Overcurrent (HSIOC)

Making Current Release (MCR)

Table 3.13. HSIOC Locations

Short

Circuit Tier

Interrupting Rating (A)

UL489

Override

UL1066

Override

240V

480V

600V

UL489 I

CW

UL1066 ICW

65,000

50,000

42,000

50,000

42,000

None

65,000

42,000

65,000

42,000

None

85,000

65,000

50,000

65,000

50,000

65,000

100,000

65,000

50,000

65,000

50,000

65,000

85,000

N/A

85,000

N/A

None

100,000

65,000

85,000

65,000

85,000

100,000

N/A

100,000

N/A

None

150,000

100,000

85,000

100,000

85,000

10,000

Reduced Energy Let-Through (RELT) Instantaneous Trip

24-May-12 Section 3. EntelliGuard TU Trip Unit System

The EntelliGuard TU trip unit’s HSIOC pickup is similar to the fixed override used by other trip units and circuit breakers in the industry. In EntelliGuard G, the HSIOC setting is changed automatically by the trip unit if the normal adjustable Instantaneous is turned off (LVPCB only). When adjustable Instantaneous setting is turned off, HSIOC nominal setting becomes 98% of the circuit breaker’s Short Time withstand setting. In all other cases, in the EntelliGuard G family of circuit breakers, the HSIOC is set high enough to allow full selectivity up to the circuit breaker’s short time withstand rating.

For circuit breakers with an HSIOC trip function, the location of the HSIOC trip is shown by the line that reaches the

0.01sec axis at the bottom of the TCC. The location of that line is shown in Table 3.11. In many applications, the

EntelliGuard G circuit breaker with an EntelliGuard TU trip unit will be completely selective up to the HSIOC pickup or

This form of Instantaneous protection is provided on all EntelliGuard G circuit breakers. This function provides protection in case the circuit breaker is closed on an unusually high current. A circuit breaker that experiences 15 times (15x) or more its plug rating is possibly closing in on a fault caused by incorrectly wired conductors, forgotten grounding cables or some other type of unusual low impedance fault.

Alternatively, it is closing on a very low impedance arcing fault. In either case, there is a possibility that equipment may be damaged by the high fault current or an arc flash hazard has been inadvertently created. The MCR provides very fast protection when the circuit breaker is closed and for the first six cycles thereafter. After the six cycles have elapsed, the MCR is turned off and the circuit breaker reverts to its adjustable Instantaneous pickup and HSIOC if provided. The

MCR will clear fault current in 40msec or less. the circuit breaker’s full short circuit rating, even with the adjustable Instantaneous on.

• All UL Overrides are -0% tolerance, ANSI Override pickup at -0% or -9% based on Adjustable Selective Instantaneous being on or off.

The EntelliGuard TU trip unit provides an optional second, user-adjustable, RELT Instantaneous trip, which allows a circuit breaker to be temporarily set to a more sensitive pickup to provide better protection, only when better protection is needed and some selectivity may be sacrificed. The RELT pickup is adjustable from 1.5X to 15X of plug rating, independently of the normal adjustable selective Instantaneous. It may be set higher or lower than the selective Instantaneous.

The user must make two entries at the trip unit: (1) Pickup settings (1.5-15X of the plug) and (2) ON, OFF or REMOTE. ON/OFF enables or disables the pickup setting. REMOTE allows the RELT Instantaneous pickup to be enabled via application of 24Vdc or Vac at the RELT input terminals or serial communications via the Modbus or Profibus communication port. The RELT pickup may be enabled via serial communication or remote 24V signal, but both need to be indicating “OFF” for the RELT Instantaneous pickup to be disabled. The RELT input command may be wired to a manual switch, automatic sensor or, via external logic,

When the EntelliGuard TU trip unit has the RELT

Instantaneous pickup enabled, the trip unit provides a

feedback signal via an optically isolated dry contact and

serial communication. This provides positive feedback that

the trip unit has received and reacted to the RELT Enable

command.

The EntelliGuard TU trip unit’s RELT capability provides the

ultimate in user flexibility for wiring and controlling an

alternate Instantaneous setting for temporary use to reduce

personnel hazard. The RELT Instantaneous pickup clears

fault current in 42msec or less at 60Hz.

RELT capability may be provided on a trip unit with or

without control power. If 24V is provided to the RELT input,

the trip unit will use the RELT Instantaneous trip setting.

However, without control power connected to the trip unit

permanently, indication that the trip unit is in the RELT mode

may not be reliably communicated. If reliable

communication that the trip unit is in the RELT mode is

desired, it is suggested that the trip unit be permanently

connected to 24Vdc control power.

to one or more signal sources.

+ 65 hidden pages

GE EntelliGuard G Application Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SECTION 1 – GENERAL INFORMATION

SECTION 2 – FEATURES AND CHARACTERISTICS

SECTION 3 – ENTELLIGUARD TU TRIP UNIT SYSTEM

SECTION 4 – ACCESSORIES

Table 3.29. Metering Data for breaker with Entelliguard Trip Unit without 24 VDC requires 20%

SECTION 5 – CATALOG NUMBERING GUIDE

SECTION 6 – APPLICATION DATA

SECTION 7 – PHYSICAL DATA

Table 1.1. Device Standards and References (See Section 8 for Details)

ANSI® Certified

UL® Listed

IEC® Rated

IEC® Extreme Atmospheric Conditions

Low-Voltage

Insulated Case

Circuit Breaker

IEC 68-2-1: Dry cold at -55°C

Power Circuit

Circuit Breaker

IEC 60947-1

IEC 68-2-2: Dry heat at 85°C

Breaker

UL 489

IEC 60947-2

IEC 68-2-30: Damp heat (temp. 55°C, rel. humidity 95%)

C37.13

NEMA AB1

C37.16

C37.17

C37.20

C37.50

UL 1066

NEMA SG3&5

Table 1.2. Device Ratings

Standard

Sensors Available

Envelope 1

Envelope 2

Envelope 3

ANSI/UL

400A - 2000A

400A - 3200A

3200A - 5000A

UL 489

400A - 2000A

400A - 3200A

3200A - 6000A

400A - 2000A

400A - 4000A

3200A - 6400A

24-May-12 Section 1. Introduction

IEC 60947-3 IEC 68-2-52 Level 2: salt mist

CSA 22.2 NO 5.1

EntelliGuard G short circuit and interrupting ratings are given in Tables 1.3 through 1.6.

Table 1.3. ANSI/UL1066 Ratings

Interrupting Rating Tier ANSI/UL1066 Devices, LVPCB

Envelope 1

Envelope 2

Envelope 3

Type

254V

508V

635V

1/2S Withstand

400, 800, 1200

400, 800, 1600,

2000

3200

400-3200

3200

4000-

5000

65,000

65,000

65,000

65,000

1/2S

Withstand

400, 800,

1200

400, 800,

1600,

Rated

Interrupting

Minimum

Mechanical

Endurance

at 480V

Endurance

at 600V