GE EntelliGuard TU User manual

Installation, Operation,
and Maintenance Manual for the UL
Versions of the EntelliGuard TU Trip Unit
Used in the following GE Circuit Breakers:
EntelliGuard G
WavePro
AKR
Power Break I
Power Break II
Retain for Future Use.
EntelliGuard® TU Trip Unit

HAZARD CATEGORIES
The following important highlighted information appears
throughout this document to warn of potential hazards or
to call attention to information that clarifies a procedure.
Carefully read all instructions and become familiar with
the devices before trying to install, operate, service or
maintain this equipment.
DANGER
Indicates a hazardous situation that, if not avoided, will
result in death or serious injury.
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION
Failure to comply with these instructions may result in
product damage.
NOTICE
Indicates important information that must be
remembered and aids in job performance
TRADEMARKS
The following are trademarks of GE Company:
EntelliGuard®
Power Break®
MicoVersaTrip®
ProTrip®
WARRANTY
This document is based on information available at the
time of its publication. While efforts have been made to
ensure accuracy, the information contained herein does
not cover all details or variations in hardware and
software, nor does it provide for every possible
contingency in connection with installation, operation,
and maintenance. Features may be described herein that
are not present in all hardware and software systems. GE
Electrical Distribution & Control assumes no obligation of
notice to holders of this document with respect to
changes subsequently made. GE Electrical Distribution &
Control makes no representation or warranty, expressed,
implied, or statutory, with respect to, and assumes no
responsibility for the accuracy, completeness, sufficiency,
or usefulness of the information contained herein. No
warrantees of merchantability or fitness for purpose shall
apply.
Contact your local sales office if further information is
required concerning any aspect of EntelliGuard G, AKR,
Power Break, Power Break II and WavePro circuit breaker
operation or maintenance.

EntelliGuard® TU Trip Unit
Table of Contents 09/25/08
4© 2008 General Electric All Rights Reserved
TABLE OF CONTENTS
SECTION 1 – GENERAL INFORMATION..........................................................................................................................................................7
INTRODUCTION .............................................................................................................................................................. 7
ABBREVIATIONS AND ACRONYMS........................................................................................................................ 7
PRODUCT DESCRIPTION ............................................................................................................................................ 7
Appearance................................................................................................................................................... 7
LCD Access..................................................................................................................................................... 7
Electrical Requirements .......................................................................................................................... 8
Equipment Interfaces............................................................................................................................... 8
COMMUNICATIONS ...................................................................................................................................................... 8
Modbus ............................................................................................................................................................ 8
ProfiBus............................................................................................................................................................ 9
OVER CURRENT PROTECTION FUNCTIONS ...................................................................................................... 9
Long Time ....................................................................................................................................................... 9
Short Time ...................................................................................................................................................... 9
Adjustable Selective Instantaneous Protection........................................................................10
Reduced Energy Let-Through Instantaneous Protection (RELT)......................................10
Ground Fault Protection........................................................................................................................11
PROTECTIVE RELAY.....................................................................................................................................................12
Voltage Unbalance Relay.....................................................................................................................12
Current Unbalance Relay .....................................................................................................................12
Under Voltage Relay ...............................................................................................................................12
Under Voltage Relay Zero-Volt Trip Enable ................................................................................12
Over Voltage Relay ..................................................................................................................................12
Power-Reversal Relay ............................................................................................................................12
Power Direction Setup ...........................................................................................................................12
Potential Transformer Primary Voltage........................................................................................12
Potential Transformer Connection..................................................................................................12
Power Demand Intervals......................................................................................................................13
Communication Address......................................................................................................................13
Bell Alarm – Alarm Only/Bell Alarm with Lock-out Accessory Configuration Setup
(applies to Power Break II and WavePro Trip Units only).....................................................13
Settings Description ................................................................................................................................13
Input ................................................................................................................................................................13
Output.............................................................................................................................................................13
Current Alarm.............................................................................................................................................14
ZONE SELECT INTERLOCK .......................................................................................................................................14
ZSI Option .....................................................................................................................................................14
High Set Instantaneous Protection (HSIOC)................................................................................14
Making Current Release (MCR)...........................................................................................................14
POWER REQUIREMENTS ..........................................................................................................................................15
METERING FUNCTION ...............................................................................................................................................15
SECTION 2 – LIFTING, MOUNTING AND INSTALLATION.........................................................................................................................16
TRIP UNIT REMOVAL AND REPLACEMENT ......................................................................................................16
Power Break I and Power Break II Insulated Case Circuit Breakers ..............................16
WavePro Circuit Breakers ....................................................................................................................16
AKR (225 A to 5000 A Frames) Circuit Breakers........................................................................17
EntelliGuard Circuit Breaker Installation ......................................................................................18

EntelliGuard®TU Trip Unit
09/25/08 Table of Contents
© 2008 General Electric All Rights Reserved 5
SECTION 3 – OPERATION................................................................................................................................................................................19
CIRCUIT BREAKER OPENING..................................................................................................................................19
WAVEFORM CAPTURE ..............................................................................................................................................19
EVENT LOGGING..........................................................................................................................................................19
LED STATUS INDICATOR ..........................................................................................................................................20
OPERATING MODES ...................................................................................................................................................20
SETUP MODE .................................................................................................................................................................21
Entering Setpoints into Memory.......................................................................................................21
Long Time Pickup .....................................................................................................................................21
Long Time Delay .......................................................................................................................................21
Short Time Pickup ....................................................................................................................................21
Short Time Delay ......................................................................................................................................21
Reduced Instantaneous Let-through Instantaneous Protection (RELT)......................21
Ground Fault Protection .......................................................................................................................22
Internal Residual Summation ............................................................................................................22
External Sensed Zero Sequence Input..........................................................................................22
Ground Fault Pickup Settings ............................................................................................................22
Ground Fault Time Delay Bands.......................................................................................................22
SECTION 4 – BATTERY......................................................................................................................................................................................23
GENERAL BATTERY INFORMATION.....................................................................................................................23
BATTERY FUNCTION ..................................................................................................................................................23
BATTERY REPLACEMENT..........................................................................................................................................23
SECTION 5 – MAINTENANCE AND TROUBLESHOOTING.........................................................................................................................24
MAINTENANCE .............................................................................................................................................................24
Rating Plug Removal and Replacement ......................................................................................24
TROUBLESHOOTING..................................................................................................................................................24
APPENDIX 1: COMMUNICATIONS PARAMETERS.......................................................................................................................................26
APPENDIX 2: OPERATING MODES AND FUNCTIONS SPECIFICS...........................................................................................................37

EntelliGuard® TU Trip Unit
Table of Contents 09/25/08
6© 2008 General Electric All Rights Reserved
TABLES
Table 1: Abbreviations and Acronyms ..................................................................................................................................................................................7
Table 2: Short Time Breaker Type and Frame...................................................................................................................................................................9
Table 3: Short Time Delay Slope Settings.........................................................................................................................................................................10
Table 4: Maximum Instantaneous for Power Break I, Power Break I, WavePro and AKR Trip Units.................................................10
Table 5: Maximum Instantaneous Thresholds for Power Break I, Power Break I, WavePro and AKR Trip Units........................11
Table 6: Ground Fault Pickup Settings ...............................................................................................................................................................................11
Table 7: Sensor Settings and Ratings ................................................................................................................................................................................11
Table 8: Ground Fault Time Delay Bands, 50 Hz and 60Hz.....................................................................................................................................11
Table 9: Voltage Unbalanced Settings...............................................................................................................................................................................12
Table 10: Current Unbalance Settings...............................................................................................................................................................................12
Table 11: Under Voltage Settings .........................................................................................................................................................................................12
Table 12: Over Voltage Settings ............................................................................................................................................................................................12
Table 13: Power Reversal Settings.......................................................................................................................................................................................12
Table 14: Input Assignments...................................................................................................................................................................................................13
Table 15: Output Configuration.............................................................................................................................................................................................13
Table 16: Metering Data............................................................................................................................................................................................................15
Table 17: Trigger Waveform Capture Events .................................................................................................................................................................19
Table 18 LED Operation.............................................................................................................................................................................................................20
Table 19: Ground Fault Time Delay .....................................................................................................................................................................................22
Table 20: Minimum Pickup and Clear Time .....................................................................................................................................................................22
Table 21: Troubleshooting Guide..........................................................................................................................................................................................25
Table 22: Communications Parameters – Modbus Function 2 ............................................................................................................................26
Table 23: Communications Parameters – Modbus Function 3 ............................................................................................................................26
Table 24: Communications Parameters – Modbus Function 4 ............................................................................................................................32
Table 25: Communications Parameters – Modbus Function 5 ............................................................................................................................36
FIGURES
Figure 1: Front Panel View – Power Break II and WavePro Trip Units..................................................................................................................7
Figure 2: Front Panel View – Power Break I and AKR Trip Units..............................................................................................................................7
Figure 3: Front Panel View – EntelliGuard G Trip Units.................................................................................................................................................7
Figure 4: Trip Unit Keypad ...........................................................................................................................................................................................................8
Figure 5: Long Time Pickup Setting ........................................................................................................................................................................................9
Figure 6: Short Time Pickup Time Current Curve.............................................................................................................................................................9
Figure 7: Removing the Old Trip Unit..................................................................................................................................................................................17
Figure 8: AKR Circuit Breaker with Trip Unit....................................................................................................................................................................17
Figure 9: Installing the New Trip Unit .................................................................................................................................................................................17
Figure 10: Trip Unit Removal Sequence, Step A............................................................................................................................................................18
Figure 11: Trip Unit Removal Sequence, Step B............................................................................................................................................................18
Figure 12: Trip Unit Removal Sequence, Step C............................................................................................................................................................18
Figure 13: Trip Unit Removal Sequence, Step D ...........................................................................................................................................................18
Figure 14: Operating Modes and Functions Overview..............................................................................................................................................20
Figure 15: Five Function Keys.................................................................................................................................................................................................20
Figure 16: Rating Plug Removal ............................................................................................................................................................................................24
Figure 17: SETUP Mode ..............................................................................................................................................................................................................37
Figure 18: METER Mode (Wye and Delta Systems) ......................................................................................................................................................41
Figure 19: STATUS Mode ...........................................................................................................................................................................................................42
Figure 20: EVENTS Mode ...........................................................................................................................................................................................................42

EntelliGuard®TU Trip Unit
09/25/08 Section 1 – General Information
© 2008 General Electric All Rights Reserved 7
SECTION 1 – GENERAL INFORMATION
INTRODUCTION
The EntelliGuard TU Trip Unit is an electronic device that
interfaces with a circuit breaker. It monitors the breaker
phase currents, neutral current and/or voltage and trips
the breaker in the event of an over-current or voltage
related condition. It also provides protective relay
functions, advanced metering, diagnostic features, and
communications. The Trip Unit can be removed or
replaced in the field by de-energizing and removing the
cover of the circuit breaker.
The Trip Unit also connects with the circuit breaker flux
shifter to provide the electromechanical tripping function.
A user interface is provided on the front panel to allow
adjustment of the Trip Unit’s parameters.
ABBREVIATIONS AND ACRONYMS
The abbreviations and acronyms in Table 1 used
throughout this manual. Slightly different abbreviations
and acronyms are used for IEC trip units.
Table 1: Abbreviations and Acronyms
Item Definition
IRMS True RMS current measurement through a
phase
xlCT Multiples of current sensor rating (non-
dimensional)
lnRating plug ampere setting where lnlCT. This is
the breaker nominal rated current (A)
PRODUCT DESCRIPTION
Appearance
The Trip Unit includes a graphical LCD. The front panel is
similar to those shown in Figure 1 through Figure 3.
Figure 1: Front Panel View – Power Break II and
WavePro Trip Units
Figure 2: Front Panel View – Power Break I and AKR
Trip Units
Figure 3: Front Panel View – EntelliGuard G Trip Units
LCD ACCESS
The trip unit has five function keys as shown in Figure 4.
Any key, when pressed, powers up the LCD.
All SETUP, STATUS, METER and EVENTS information is
accessed through these five keys.

EntelliGuard®TU Trip Unit
Section 1 – General Information 09/25/08
8© 2008 General Electric All Rights Reserved
Figure 4: Trip Unit Keypad
•UP: Scroll up or increment value
•DOWN: Scroll down or decrement value
•RIGHT: Next function or next page
•LEFT: Previous function or previous page
•ENTER: Save or set in to memory
Electrical Requirements
None: Plug in installation. Done on un-energized units.
Equipment Interfaces
Power Break I, Power Break II, WavePro, AKR and
EntelliGuard G Circuit Breakers.
Trip units, for the most part, do not require direct
connections to the equipment. All wiring is intended to
connect to the circuit breaker or cassette. Connections
that are required for other equipment are the optional
zone-selective interlock, input, and relay output made by
the secondary disconnect, and the neutral sensor, which
uses a special dedicated disconnect.
Zone-selective interlocking coordinates breakers so that
the downstream breaker is allowed the first opportunity
to clear a fault or overload event. The types of available
zone-selective interlocking are Z, which reacts to ground
faults and short time pickups, and T, which reacts to
ground faults, short-time and instantaneous pickups.
Input 1 can be programmed for reduced instantaneous
or trip the breaker. Other inputs can be programmed to
trip the breaker only.
Power Break I, Power Break II, WavePro and AKR Trip
Units have one relay. EntelliGuard G Trip Units have two
output relays. The relay output can be assigned to the
following functions:
•GF Alarm
•Over-current trip (GF, INST, LT, ST)
•Reduced Instantaneous (RELT) Active
•Protective Relays
•Current Alarm 1
•Current Alarm 2
•Health status
The trip units must have the specific option (as an
example protective relay must be enabled in order for
protective function to actuate the relay) enabled in order
to actuate the relay.
In addition to the inputs indicated above, Power Break I,
Power Break II, WavePro, AKR , and EntelliGuard G Trip
Units also receive inputs from external voltage
conditioners, a +24 VDC control power supply, and
communication connections. (Note: external +24 VDC
control power is required for communication.)
All trip unit types have a connection to an auxiliary switch
within the breaker that senses the breaker’s position.
COMMUNICATIONS
External +24 VDC control power is required for
communications.
Power Break I, Power Break II, WavePro, AKR, and
EntelliGuard G Trip Units support Modbus communication
protocol. In addition, EntelliGuard G Trip Units support
Profibus communication.
Modbus and Profibus connections are made directly to
wiring terminations on breaker frames. All
Modbus/Profibus connections are made through the trip
unit’s back (Power Break I, Power Break II, WavePro and
AKR Trip Units) and top (EntelliGuard G Trip Units)
connectors, which mate with a receptacle on the breaker
frame. These additional connections are made to the
equipment through the secondary disconnects of the
breaker.
Modbus
The Trip Units are fully compliant with Modbus Protocol.
Full details of the Modbus protocol can be found in the
Modbus Protocol Specification.
Two wire Modbus 485 are supported.
The link Host may operate at a 300, 600, 1200, 2400,
4800, 9600 or 19200-baud rate.

EntelliGuard®TU Trip Unit
09/25/08 Section 1 – General Information
© 2008 General Electric All Rights Reserved 9
ProfiBus
This protocol is integral to EntelliGuard G Trip Units.
ProfiBus DP over RS485 is supported.
OVER CURRENT PROTECTION FUNCTIONS
The Trip Unit provides the following over current
protections:
•Long Time
•Short Time
•Instantaneous
•Reduce Let Through Energy Instantaneous (RELT)
•Ground Fault Internal Summation
•Ground Fault CT External Summation
•Override (HSIOC)
•Making Current Release (MCR)
Long Time
Long Time Pickup
This setpoint establishes the breaker's nominal ampere
rating, xLT, as a fraction of the rating plug value, xIn (xLT
= LT multiplier x xIn).
The adjustment range for long time pickup settings is
0.50 to 1.00 times xIn in steps of 0.05. The pickup value
tolerance band has a 10% tolerance. The band is drawn
at 1/(1+10%) and 1/1-10%). The actual long time pickup is
increased by 12% over the nominal so that 100%
nominal current may be carried indefinitely. So a 1000 A
setting is placed at 1120 A with the minimum pickup
drawn (left side of band) is 1120 A/1.1, and the maximum
pickup (right side of band) is drawn at 1120 A/0.9. Figure
5 shows the Long Time pickup setting.
Figure 5: Long Time Pickup Setting
Long Time Delay
The trip unit makes up to 44 different long time bands
available. Not all circuit breakers have all bands available.
There are 22 bands using a logarithmic type curve that
resembles the thermal portion of a thermal magnetic
circuit breaker. There are 22 bands that are a straight line
that simulate a fuse curve. The Entelliguard circuit
breaker is able to use all 44 bands. Power Break I, Power
Break II, WavePro and AKR circuit breakers use the 19
lower thermal CB-type bands and the 22 fuse-type
bands.
Short Time
Short Time Pickup
The Short Time Pickup function establishes the current at
which short time trip is activated. Short Time Pickup is
coupled with Long Time Pickup and the choices of pickup
settings are from 1.5 to 12.0 times the Long Time setting,
xLT, in steps of 0.5 xLT.
The maximum pickup depends on breaker type and
frame as shown in Table 2 below:
Table 2. Short Time Breaker Type and Frame
Breaker Available Settings
PowerBreak I, PowerBreak II,
WavePro, AKR conversion kits
1.5 to 9, steps of 0.5
EntelliGuard G Frame 1 and 2 1.5 to 12, steps of 0.5
EntelliGuard G Frame 3 1.5 to 10, steps of 0.5
The Short Time Pickup value tolerance band is -9% to
+11% of the set point based on a 10% current sensing
accuracy with the pickup calculated with 1/(1+Tolerance).
The time current curve of short time pickup is shown in
Figure 6.
Figure 6: Short Time Pickup Time Current Curve
Short Time Delay
The Short Time Delay setting consists of both a slope
setting and a fixed delay band setting. The slope and
delay are independently selectable. The slope setting
consists of three I2T slopes (minimum (1), intermediate (2)
and maximum (3)) and fixed delay. The fixed delay bands
consist of 11 constant time bands. The width of the bands
varies by circuit breaker and with frequency. See Table 3.

EntelliGuard®TU Trip Unit
Section 1 – General Information 09/25/08
10 © 2008 General Electric All Rights Reserved
Table 3: Short Time Delay Slope Settings
Commit Time EntelliGuard G
Band TDB Setting
50 Hz 60 Hz Clear Time 60 Hz Clear Time 50 Hz
1 Min. 0.030 0.025 0.080 0.085
2 2nd 0.040 0.033 0.088 0.093
3 3rd 0.050 0.042 0.097 0.102
4 4th 0.060 0.058 0.113 0.118
5 5th 0.110 0.092 0.147 0.152
6 6th 0.130 0.117 0.172 0.177
7 7th 0.180 0.158 0.213 0.218
8 8th 0.210 0.183 0.238 0.243
9 9th 0.240 0.217 0.272 0.277
10 10th 0.280 0.350 0.405 0.410
11 Max. 0.340 0.417 0.472 0.477
Adjustable Selective Instantaneous Protection
Adjustable Selective Instantaneous over current
protection causes an undelayed breaker trip when the
chosen current level and proper waveform is reached.
The pickup value may be set in steps of 0.5 xIn from 2.0
xIn to 15 xIn and steps of 1 xIn from 15 xIn to a maximum
of 30 xIn. Greater than 15xIn is available only in trips
provided with the “Extended Range Instantaneous”
option on ANSI EntelliGuard G circuit breakers.
The maximum possible setting depends on the trip unit
instantaneous option provided, the circuit breaker’s
withstand capability and whether or not ST has been
enabled.
Table 4: Maximum Instantaneous For Power Break I,
Power Break II, WavePro and AKR Trip Units
ANSI (X In) UL (X In)
Frame
(A) With ST W/O ST With ST W/O ST
800 15 10 15 10
1,600 15 10 15 10
2,000 15 10 15 10
2,500 --13 10
3,000 --13 10
3,200 13 10 --
4000 9 9 9 9
5000 7 7 --
The Instantaneous pickup accuracy is 10%. On trip units
with the user-selectable switchable instantaneous over
current and ground-fault option, an additional value of
OFF appears at the end of the listing of numerical values.
Choose this setting to disable instantaneous protection,
and or GF protections.
Short Time and Instantaneous cannot be turned off
simultaneously. Only ANSI circuit breakers may have the
Instantaneous off option. Trips with GF off as an option
are not UL listed.
When Instantaneous pickup is set above the maximum
allowed for the CB without ST on, ST pickup is
automatically switched on at a default delay is
automatically switched on at a minimum delay setting.
Reduced Energy Let-Through Instantaneous
Protection (RELT)
EntelliGuard G Trip Units provide a Reduced Let-Through
Energy Instantaneous function (RELT) which may be
enabled at the trip’s key pad, via a 24 VDC/AC signal to
INPUT 1 or via serial communications. The RELT function
provides a faster instantaneous trip function that may be
used in case faster and more sensitive protection is
required temporarily.
The pickup value may be set in steps of 0.5 xIn from
1.5 xIn to 15xIn or the maximum allowed instantaneous
pickup for the particular circuit breaker type, rating and
size. The maximum setting depends on the trip unit
catalog number, breaker type and frame, and whether or
not ST is enabled. See Table 6.

EntelliGuard®TU Trip Unit
09/25/08 Section 1 – General Information
© 2008 General Electric All Rights Reserved 11
Table 5: Maximum Instantaneous Thresholds For
Power Break I, Power Break II, WavePro and AKR Trip
Units
Breaker
Frame Size
(A)
Maximum
Instantaneous
Threshold with
Short Time (×IN)
Maximum
Instantaneous
Threshold without
Short Time (×IN)
800 Off, 1.5 to 15 Off, 1.5 to 10
1600 Off, 1.5 to 15 Off, 1.5 to 10
2000 Off, 1.5 to 15 Off, 1.5 to 10
3200 Off, 1.5 to 13 Off, 1.5 to 10
4000 Off, 1.5 to 9 Off, 1.5 to 9
5000 Off, 1.5 to 7 Off, 1.5 to 7
Ground Fault Protection
The Trip Unit provides two types of ground fault
protection in addition to the GF alarm. These protections
are independent. The GF alarm has the same pickup level,
band choices and tolerances as GF.
The GF pickup value tolerance band is 15% the set point.
The ground fault pickup settings are listed in Table 6 as
multiples of xCT the current sensor rating, in steps of
0.01 xCT. The maximum value is limited to 1200.
Table 6: Ground Fault Pickup Settings
Protection
Type
Sensor, ICT Ground Fault Pickup
Threshold (×ICT)
GF SUM
GF SUM ALARM
GF CT
GT CT ALARM
150–2000 0.20–0.60 (max of 1200
A) (increment of 0.01)
with OFF as a selection
when GF or GF Alarm
Switchable is optioned.
GF/ALARM
Pickup
2500-3200 0.20–0.37 (increment of
0.01) with OFF as a
selection when GF or GF
Alarm Switchable is
optioned.
GF/ALARM
Pickup
4000 0.20–0.30 (increment of
0.01 with OFF as a
selection when GF or GF
Alarm Switchable is
optioned.
GF/ALARM
Pickup
5000 0.20–0.24 (increment of
0.01) with OFF as a
selection when GF or GF
Alarm Switchable is
optioned.
GF/ALARM
Pickup
6000 0.2 (1200 A) with OFF as
a selection when GF or
GF Alarm Switchable is
optioned.
Table 7 gives the sensor settings and ratings.
Table: 7: Sensor Settings and Ratings
Sensor Max. X Min. A Max. A
400 0.60 80 A
240 A
600 0.60 120 A 360 A
800 0.60 160 A 480 A
1200 0.60 240 A 720 A
1600 0.60 320 A 960 A
2000 0.60 400 A 1,200 A
2500 0.48 500 A 1,200 A
3000 0.40 600 A 1,200 A
3200 0.37 640 A 1,184 A
4000 0.30 800 A 1,200 A
5000 0.24 1,000 A 1,200 A
6000 0.20 1,200 A 1,200 A
Notes:
•Continuously adjusted in 0.01 increments.
•Minimum X is 0.2 for all sensors.
Ground-Fault Delay
This function sets the delay before the breaker trips when
the ground-fault pickup current has been detected.
The Ground Fault Delay setting consists of a selection
between two I2T slopes:, an optional steeper fuse slope,
and fixed delay only. One of fourteen fixed time bands is
also selected. The fixed delay bands are listed in Table 8.
Table 8: Ground Fault Time Delay Bands, 50 Hz
and 60 Hz
EntelliGuard G UL
Commit Time (S)
PB I, PB II,
WavePro, AKR
Commit Time (S)
Time
Band
60 Hz 50Hz 60 Hz 50Hz
1 0.042 0.050
--
2 0.058 0.060 0.058 0.060
3 0.092 0.110 0.092 0.110
4 0.117 0.130 0.117 0.130
5 0.158 0.180 0.158 0.180
6 0.183 0.210 0.183 0.210
7 0.217 0.240 0.217 0.240
8 0.350 0.280 0.350 0.280
9 0.417 0.340 0.417 0.340
10 0.517 0.390 0.517 0.390
11 0.617 0.540 0.617 0.540
12 0.717 0.640 0.717 0.640
13 0.817 0.740 0.817 0.740
14 0.917 0.840 0.917 0.840
Notes:
•Power Breaker I, Power Breaker II, WavePro and AKR
time band width is 60 msec.
•EntelliGuard G 60 Hz time band width is 0.055 sec.
•EntelliGuard G 50 Hz time band width is 0.060 sec.

EntelliGuard®TU Trip Unit
Section 1 – General Information 09/25/08
12 © 2008 General Electric All Rights Reserved
PROTECTIVE RELAY
The protection relay can be set to either cause a trip or
an alarm. If the PR Enable on the LCD is set to ON, a trip
will be generated, if set to NO an alarm will be generated.
Voltage Unbalance Relay
This function compares the highest or lowest phase
voltage with the average of all three phases and initiates
a trip if the difference exceeds the set point.
Table 9: Voltage Unbalance Settings
Item Option
Voltage unbalance
pickup
Adjustable from 10% to 50%
in increments of 1%.
Voltage unbalance
delay setting
Adjustable from 1 sec to
15 sec in increments of 1 sec.
Setting this value to zero (0)
disables this function.
Current Unbalance Relay
This function compares the current in the highest or
lowest phase with the average of all three phases and
initiates a trip if the difference exceeds the set point.
Table 10: Current Unbalance Settings
Item Option
Current unbalance
pickup
Adjustable from 10% to 50%
in increments of 1%.
Current unbalance
delay setting
Adjustable from 1 sec to
15 sec in increments of 1 sec.
Setting this value to zero (0)
disables this function.
Under Voltage Relay
This function measures the voltage in all phases and
initiates a trip if any phase voltage drops below the set
point.
Under Voltage Relay Zero-Volt Trip Enable
This function determines if the relay trips when all three-
phase voltages drop to zero volts. See Table 11.
Table 11: Under Voltage Settings
Item Option
Under voltage
pickup
Adjustable from 50% to 90% in
increments of 1%.
Under voltage
delay setting:
Adjustable from 1 sec to 15 sec in
increments of 1 sec. Setting this value
to zero (0) disables this function.
Over Voltage Relay
This function measures the voltage in all phases and
initiates a trip if any phase voltage exceeds the set point.
See Table 12.
Table 12: Over Voltage Settings
Item Option
Over voltage
pickup
Adjustable from 110% to 150% in
increments of 1%.
Over voltage
delay
Adjustable from 1 sec to 15 sec in
increments of 1 sec. Setting this value
to zero (0) disables this function.
Power-Reversal Relay
This function measures the direction of power flow
through the breaker and initiates a trip if a sufficient
magnitude of reverse power is detected.
Table 13: Power Reversal Settings
Item Option
Power
reversal
pickup
Adjustable from 10 kW to 990 kW in
increments of 10 kW.
Power
reversal delay
Adjustable from 1 sec to 15 sec in
increments of 1 sec. Setting this value
to zero (0) will disable this function.
Power Direction Setup
This function selects the normal power flow direction for
the breaker, either from line to load or from load to line.
This direction setup also affects the sign of the normal
power metering displays.
Potential Transformer Primary Voltage
Enter the primary voltage rating of the potential
transformer. The range of values is 120 V to 600 V, with
an increment of 1 V.
NOTICE
Incorrect set point will result in incorrect metering
values.
Potential Transformer Connection
Select the appropriate potential transformer connection,
either line-to-line (Ph-Ph) or line-to-neutral (Ph-N).

EntelliGuard®TU Trip Unit
09/25/08 Section 1 – General Information
© 2008 General Electric All Rights Reserved 13
Power Demand Intervals
This function sets the power demand interval, which can
be in the range of 5 min to 60 min, in steps of 5 min. This
setpoint specifies the time interval for power demand
averaging.
Communication Address
The address options are from 1 to 254, in steps of 1 for
Modbus and Profibus communication protocols.
Bell Alarm-Alarm Only/Bell Alarm with Lock-out
Accessory Configuration Setup (applies to Power
Break II and WavePro Trip Units only)
This defines the types of signals (protection trip, Shunt
trip, Shunt Trip with Lockout, or Under Voltage Release
trip) that activate the Bell Alarm-Alarm Only and Bell
Alarm with Lockout accessories on the Power Break II
breaker only. The customer may enable or disable a
different path to activate these accessories from the
different types of trip signals.
The following settings can be set on the LCD or through
communication:
•Disabled
•Shunt Trip
•UVR Trip
•Over Current Trip
•Protective Relay Trip
•Shunt, UVR
•Shunt, Over Current
•Shunt, Protective Relay
•UVR, Over Current
•UVR, Protective Relay
•Over Current, Protective Relay
•Shunt Trip, UVR, Over Current
•Shunt, UVR, Protective Relay
•Shunt, Over Current, Protective Relay
•UVR, Over Current, Protective Relay
•Shunt, UVR, Over Current, Protective Relay
Settings Description
The following are descriptions of the effects of each
accessory switch when it is enabled:
If Bell Alarm or Bell Alarm with Lockout is set to Shunt
Trip, a fault generated by a Shunt Trip will cause the Bell
Alarm contacts to change state.
If Bell Alarm with Lock-out is set to over current trip, a
fault generated by LT, ST, GF, and/or Instantaneous will
cause the Bell Alarm contacts to change state.
Input
Inputs can be assigned to two main functionalities:
•Reduced Energy Let-Through (RELT)
•Trip the breaker
Table 14 shows the assignment for the inputs.
Table 14: Input Assignments
Input Input 1
Assignment
Summary Description
OFF No action taken.
TRIP Causes a breaker to trip.
1
RELT Causes unit to use the RELT
setpoint as long as input is
active.
Note: RELT must be set to
REMOTE.
OFF No action taken.2
TRIP Causes a breaker to trip.
Output
The number of outputs available varies by breaker. These
outputs are relay contact outputs to secondary
disconnect. Each output can be configured per Table 15.
Table 15: Output Configuration
Group Function Function Summary
Description
1 GF alarm Turns on when GF alarm
is activated.
2 Over-current trip
(GF, INST, LT, ST)
Over-voltage trip turns
ON the relay.
3 Protective relays When protective relay
trips the relay contact
closes.
4 Current alarm 1 Exceeding current alarm
pick-up turns closes the
relay contact.
5 Current alarm 2 Exceeding current alarm
pick-up turns closes the
relay contact.
6 *Health status Relay contact will be
closed or opened
depending on the health
contact setting.
7 Reduced Energy
Let-Through
Output relay contact
closes when the RELT
pickup is enabled.
Note:
The health relay can be set to either normally open (NO)
or normally close (NC) via communication. The contacts
are rated for 30 VDC/25 VAC MAX, 1 A.

EntelliGuard®TU Trip Unit
Section 1 – General Information 09/25/08
14 © 2008 General Electric All Rights Reserved
Current Alarm
The trip unit provides two types of current alarms:
Current Alarm 1 and Current Alarm 2.
The Current Alarm’s ON/OFF pickup settings are 0.5 to 1.0
xIn in steps of 0.05.
The trip unit does not allow the current alarm OFF
setpoint to be set above the ON threshold.
If the highest measured phase current goes above
Current Alarm 1 or Current Alarm 2 ON setpoint, and then
remains above the setpoint for more than 60 sec, the
output will close if assigned to either of these alarms.
If the current falls below the Current Alarm 1 or Current
Alarm 2 for more than 60 sec, the output, if assigned to
Current Alarm, will open.
ZONE SELECT INTERLOCK
The Zone Select Interlock (ZSI) function operates with a
group of series-connected breakers. The ZSI is achieved
with the use of the TIM module or an equivalent GE
qualified and recommended device.
ZSI Option
Per the trip unit catalog number there are two types of
zone-selective interlocking options:
•Z: reacts to ground faults and short time pickups.
•T: reacts to ground faults, short time and
instantaneous pickups. (Requires 24 VDC external
power be provided to the trip unit.)
The upstream breaker uses the ST ZSI and/or GF ZSI delay
bands and slope, and/or transition to a delay
Instantaneous if it receives a downstream ZSI signal.
The desired ZSI (ST and-or GF and-or Inst) must be
selected in order for the downstream breaker to issue a
ZSI signal, and the upstream breaker to act upon this
signal.
The ST ZSI Delay Bands are independent and have the
same bands available. Slope settings may also be
interlocked.
The GF ZSI Delay Bands are independent and have the
same bands available. Slope settings may also be
interlocked.
High Set Instantaneous Protection (HSIOC)
HSIOC is also Known as Override Pickup. Some of the trip
units on EntelliGuard G circuit breakers may be provided
with an override instantaneous trip.
Whether such a trip is provided or not depends on the
circuit breaker within which the trip is installed. If the
circuit breaker’s withstand (Icw) is equal to the short
circuit rating then the trip will not have an override
pickup. If the withstand rating is lower than the short
circuit rating then the trip will enable override protection
of the circuit breaker.
In UL 489 circuit breakers the HSIOC setting is nominally
at 107%of the Icw for the circuit breaker. Taking
tolerance into account, the override’s minimum trip is at
100% of the circuit breaker’s Icw.
In UL 1066 (ANSI) circuit breakers the HSIOC setting is
also at 107% Icw if the adjustable selective
instantaneous is ON. If the adjustable selective
instantaneous is OFF then the HSIOC nominal pick up is
at 98% of the circuit breaker’s Icw and, considering
tolerance, the minimum pickup is at 91% of the circuit
breaker’s Icw.
Power Break I, WavePro and AKR circuit breakers do not
employ an override function. PowerBreak II circuit
breakers use a mechanical override function.
Making Current Release (MCR)
Every EntelliGuard TU or EntelliGuard TU circuit breaker
uses a making current release. The making current
release varies per circuit breaker Envelope and is related
to the circuit breaker’s close and latch rating.
The MCR pickup is activated at the time the circuit
breaker closes and for six cycles thereafter. When the six
cycles are over, the threshold changes to the HSIOC
pickup setting.

EntelliGuard®TU Trip Unit
09/25/08 Section 1 – General Information
© 2008 General Electric All Rights Reserved 15
POWER REQUIREMENTS
WARNING
IMPROPER INSTALLATION, OPERATION AND
MAINTENANCE
Ensure only qualified personnel install, operate, service
and maintain all electrical equipment.
Failure to comply with these instructions could
result in death or serious injury.
A small amount of power is necessary to energize the
liquid crystal display (LCD) during setup, for viewing
breaker status and for metering displays.
Power Break I, Power Break II, WavePro, AKR and
EntelliGuard G Trip Units require external +24 VDC control
power for communication
The power sources are:
•Current flow: Breaker current sensors provide
sufficient power to energize the LCD when at least
20% of the sensor's ampere rating is flowing.
•+24 VDC control power
•Internal battery power: Powers the unit temporarily
when any keypad key is pressed. Battery power
automatically turns off 20 sec after the last keypad
press. The battery power supply is disabled when any
current is sensed through the current sensors.
METERING FUNCTIONS
Table 16 shows the metering data provided by the trip
unit:
Table 16: Metering Data
Parameter Phase Unit
Current Phase A,B,C,
neutral
A
Voltage Phase L1, L2, L3
(Note 1)
V
Real Power Phase L1, L2, L3
and total
kW
Reactive Power Phase L1, L2, L3
and total
kVAR
Apparent
Power
Phase L1, L2, L3
and total
kVA
Peak Power
Demand
Total Auto-ranging from
0.00 kWH to 999
mW
Energy Phase A, B, C
and total
Auto-ranging from
0.00 kWH to 999
mWH
Frequency -Hz
Power Factor -%
Notes:
•Potential transformers must be connected similar to
source (Wye or Delta). For Wye construction V=L-N
and for Delta construction V=L-L.
•Energy reset is supported from setup software and
over communications.

EntelliGuard® TU Trip Unit
Section 2 – Lifting, Mounting and Installation 09/25/08
16 © 2008 General Electric All Rights Reserved
SECTION 2 LIFTING, MOUNTING AND
INSTALLATION
DANGER
ELECTROCUTION
•Ensure the circuit breaker has been tripped,
indicating OFF and that applicable lock-out/tag-
out requirements are met and followed.
•Ensure the main springs are fully discharged.
•Do not touch the circuit breaker’s isolating
contacts during lifting.
Failure to comply with these instructions will result
in death or serious injury.
WARNING
IMPROPER INSTALLATION, OPERATION, SERVICE AND
MAINTENANCE
•Ensure only qualified personnel install, operate,
service and maintain all electrical equipment.
•Do not perform any maintenance, including
breaker charging, closing, tripping, or any other
function that could cause significant movement of
circuit breaker while it is on the draw-out
extension rails.
•Ensure circuit breaker is always left in the
CONNECTED, TEST or DISCONNECTED position to
avoid mispositioning of the breaker and flashback.
Failure to comply with these instructions could
result in death or serious injury.
WARNING
FALLING OBJECT
•Ensure lifting equipment has capability for device
being lifted.
•Wear hard hat, gloves and safety shoes.
Failure to comply with these instructions could
result in death or serious injury.
CAUTION
PRODUCT DAMAGE
•Ensure circuit breaker and its accessories are
always used within their designated ratings.
•Ensure the correct trip unit is paired with the
correct circuit breaker.
•Do not use excessive force when installing a trip
unit.
•Do not allow circuit breaker to hit a hard surface
while handling.
•Do not drag or slide circuit breaker across a hard
or rough surface.
Failure to comply with these instructions may
result in product damage.
TRIP UNIT REMOVAL AND REPLACEMENT
Power Break I, Power Break II, WavePro and AKR Trip
Units have rejection pins, installed on the rear of these
trip units, to prevent installation of an incorrect trip unit
into a breaker.
Replacement of a trip unit always requires repeating the
setup procedures
Power Break I and Power Break II Insulated Case
Circuit Breakers
The trip unit procedures for Power Break I and Power
Break II circuit breakers are very similar and are outlined
below. The EntelliGuard TU trip unit for a Power Break I is
different than that for a Power Break II (see Section 1).
Ensure the correct trip unit is used.
Trip Unit Removal
1. Loosen the four #8-32 screws on the circuit breaker
trim-plate assembly and remove the trim plate.
2. Loosen the four #10-32 screws at the corner of the
breaker cover. Remove the cover from the breaker
face.
3. Pull the trip unit locking lever to the right, then hold
the trip unit near the battery cover and lift it straight
out of the circuit breaker.
Trip Unit Reinstallation
1. Pull the trip unit locking lever to the right. While
holding the lever, carefully align the connector on the
rear of the trip unit with the connector in the breaker.
Press down on the trip unit while holding it near the
battery cover. When the trip unit is fully seated, slide
the locking lever back to the left.
2. Reinstall the breaker top cover and tighten the four
#10-32 screws to 32 in-lb.
3. Replace the trim plate and tighten the four #8-32
screws to 20 in-lb.
WavePro Circuit Breakers
Removal
1. Open the circuit breaker and remove it from the
cubicle or substructure. Place it on a suitable work
surface.
2. For 800 A, 1600 A and 2000 A frame circuit breakers,
insert the racking handle (catalog number
568B731G1) and move the racking mechanism to the
TEST position, as shown on the draw-out position
indicator.
3. Depress the OPEN button to close the racking door.
4. Remove the wire forms and remove the trim plate
from the breaker.

EntelliGuard®TU Trip Unit
09/25/08 Section 2 – Lifting, Mounting and Installation
© 2008 General Electric All Rights Reserved 17
5. Remove the six ¼ hex head screws, securing the
escutcheon to the breaker (three at top and three at
bottom). Pull the manual-charging handle out part
way, and then slide off the escutcheon.
6. Pull out the locking side on the right of the trip unit
mounting plate, and then pull the trip unit out
carefully disengaging the pins on the rear connector.
7. Pull out the locking side on the right of the trip unit
mounting plate, and then pull the trip unit out
carefully disengaging the pins on the rear connector.
Reinstallation
1. Pull out the locking side on the right of the trip unit
mounting plate. Push the trip unit into place,
carefully, engaging the 50 pin connector and lining
up the rejection posts on the rear of the trip unit with
the holes in the mounting plate. Push the locking
slide to the left.
2. Ensure the breaker racking mechanism is still in the
TEST position. Pull the manual charging handle out
partway, and then slide the handle through the slot in
the escutcheon and move escutcheon into place.
Insert the six mounting screws and tighten to 14-20
in-lb.
3. Replace the trim plate around the escutcheon by
re-hooking the wire forms into the sides.
4. Insert the racking handle and return the racking
mechanism to the DISC position, as shown by the
draw-out position indicator.
5. Reinstall the circuit breaker into its cubical or
substructure.
AKR (225 A to 5000 A Frames) Circuit Breakers
1. Open the circuit breaker by pressing the red TRIP
button on the front of the breaker escutcheon.
2. Disconnect any secondary wire harnesses between
the breaker and the switchgear.
3. On draw-out breakers, rack the breaker all the way
out to the DISCONNECT position.
4. Follow the instructions on the label attached to the
PROGRAMMER RELEASE LEVER to remove the trip
unit. There are three types of mounting plates:
•Type 1: Push in the lever to release the trip unit.
•Type 2: Pull out the lever to release the trip unit
as shown in Figure 7.
•Type 3: Push down on the lever.
Figure 7: Removing the Old Trip Unit
5. If the breaker is equipped with a MicroVersaTrip® 9
trip unit, the 36-pin trip unit connector must be
removed and remounted on the adapter bracket
provided. Slide the connector out of the mounting
plate and install it on the adapter bracket, as shown
in Figure 8.
Figure 8: AKR Circuit Breaker without Trip Unit
6. Align the connectors and rejection pin and connect
the EntelliGuard TU to the circuit breaker, as shown in
Figure 9.
Figure 9: Installing the New Trip Unit

EntelliGuard® TU Trip Unit
Section 2 – Lifting, Mounting and Installation 09/25/08
18 © 2008 General Electric All Rights Reserved
EntelliGuard G Circuit Breaker Installation
Trip Unit Removal (See Figures 10 through 13)
1. Loosen the six screws on the breaker
fascia assembly and remove the fascia.
2. Depress
the trip unit locking lever on the left side of
the trip unit, then hold the trip unit near the bottom
and lift it straight out of the mounting base.
Figure 10. Trip Unit Removal Sequence, Step A
Figure 11. Trip Unit Removal Sequence, Step B
Figure 12. Trip Unit Removal Sequence, Step C
Figure 13. Trip Unit Removal Sequence, Step D
Trip Unit Reinstallation
1. Depress the trip unit locking lever on the left side of
the trip unit
. While depressing the lever, carefully
align the connector on the rear of the trip unit with
the connector in the mounting base on the breaker.
Press down on the trip unit while holding it near the
bottom.
2. When the trip unit is fully seated, stop depressing the
trip-unit-locking lever and allow the lever to come up
and lock the trip unit to the mounting base.
3. Reinstall the breaker fascia and ensure that the Trip
unit is centered in the fascia window before
tightening the fascia fixing screws.

EntelliGuard®TU Trip Unit
09/25/08 Section 3 – Operation
© 2008 General Electric All Rights Reserved 19
SECTION 3 – OPERATION
WARNING
IMPROPER INSTALLATION, OPERATION AND
MAINTENANCE
Ensure only qualified personnel install, operate,
service and maintain all electrical equipment.
Failure to comply with these instructions could
result in death or serious injury.
WARNING
PERSONAL INJURY
•Avoid risk of injury from moving parts while
handling the circuit breaker.
•If advisable, use a cable/busbar lockable
grounding device (optional accessory) to provide
additional safety during system maintenance.
Failure to comply with these instructions could
result in death or serious injury.
CAUTION
PRODUCT DAMAGE
•Ensure circuit breaker and its accessories are
always used within their designated ratings.
•Use the specially designed circuit breaker
handling truck (optional accessory) when
removing the circuit breaker from its cassette.
Failure to comply with these instructions may
result in product damage.
NOTICE
•Each charging action provides sufficient charge
for an Open-Close-Open Operation without
requiring additional charging.
•The mechanism works properly only when the
circuit breaker is mounted on a horizontal plane
with bottom mounting or on vertical plane with
front mounting.
CIRCUIT BREAKER OPENING
NOTICE
Tripping under fault conditions will be automatic
depending on the protective device installed and its
settings.
WAVEFORM CAPTURE
A total of eight cycles are captured:
•Four pre-trigger.
•Four post-trigger.
24 V external power is required for this feature.
When waveform capture is executed, the following
channels will be captured simultaneously: Phase A
current, Phase B Current, Phase C Current, Phase L1
voltage, Phase L2 voltage, Phase L3 voltage. See Table 17.
Table 17: Trigger Waveform Capture Events
Event Waveform Capture
Setpoint
Manual trigger over
communications
ON, OFF
Over current (GF, ST, LT, Inst) ON, OFF
Protective relays ON, OFF
Current alarm 1 ON, OFF
Current alarm 2 ON, OFF
EVENT LOGGING
The trip unit keeps a log of the last 10 events:
•Over current trips
•Protective relay trips
•Shunt trip (PBII and Global EntelliGuard G Trip Units
Only)
•Under voltage Release trip (PBII and Global
EntelliGuard G Trip Units Only)
•BIM Trip Unit Mismatch - Breaker Interface Module
The following information is stored with each event:
•RMS currents
•Phase
•Type of trip
•Trip counter
•Time and date stamps
Trips are logged under self power without time stamp.
Events with time stamps are only logged when 24 V
control power is available.
All setup, status and metering information is accessed
through five keys whose functions are:
•Up: Scroll up or increment value
•Down: Scroll down or decrement value
•Right: Next function or next page
•Left: Previous function or previous page
•Enter: Save or setting in to memory

EntelliGuard® TU Trip Unit
Section 3 – Operation 09/25/08
20 © 2008 General Electric All Rights Reserved
LED STATUS INDICATOR
Table 18 shows the operation of the green LED located on
the front of the trip unit.
Table 18: LED Operation
Power Break I and
AKR Trip Units
Status
LED Status
Normal ON-OFF-ON-OFF (OFF for 2 sec)
Error ON-OFF-ON-OFF-ON-OFF
(OFF for 2 sec)
Trip ON-OFF (OFF for 2 sec)
Pickup ON-OFF-ON-OFF-ON-OFF-ON-OFF
(continuous)
OPERATING MODES
Power Break I, Power Break II, WavePro, AKR and
EntelliGuard G Trip Units have four operating modes:
Setup, Meter, Status and Events as shown in Figure 14.
(See Appendix 2 for Operating Modes and Functions
Specifics.)
Figure 14. Operating Modes and Functions Overview
Figure 15 shows the five functions keys:
•UP: Scroll up or increment value
•DOWN: Scroll down or decrement value
•RIGHT: Next function or next page
•LEFT: Previous function or previous page
•ENTER: Save or set in to memory
Figure 15: Five Function Keys