GE Industrial Solutions EntelliGuard TU Conversion kits User Manual
DEH–3456
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For GE Low Voltage Power Circuit breaker types:
For I-T-E Low Voltage Power Circuit breaker types:
For Allis Chalmers Low Voltage Power Circuit breaker types:
Entelliguard TU Conversion kits
AK, AKT, AKS, AKU, AKJ, AKR, AKRU, AKRT, AKJT, AKW
K, KA, KB, KC, KD, KE
LA Gold, LA Blue
For Westinghouse Low Voltage Power Circuit breaker types:
DB, DS
Supplementary Instructions Only
This publication must be read in conjunction with the installation instructions for
MicroVersaTrip
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Plus and PM Conversion kits for GE Low Voltage Power Circuit Breaker of
respective type.
Introduction
GE conversion kits are designed to upgrade existing GE Low Voltage Power Circuit Breakers, rather
then replacing the entire breaker. The conversion kits contain enhanced solid state Entelliguard TU,
representing the latest technological advancements in GE trip systems.
This supplementary publication covers specific instructions for the installation of Entelliguard TU
with advanced optional features like RELT (Reduced energy let through mode), Ground Fault Alarm
etc. in GE Low Voltage Power Circuit Breakers. This supplementary publication does not detail all
aspects of the conversion kit installation process.
The EntelliGuard TU trip unit provides an optional second, user-adjustable, RELT Instantaneous trip.
This trip provides an alternate Instantaneous setting that allows a user to temporarily set a circuit
breaker to a more sensitive pickup to provide better protection, only when better protection is
needed and some selectivity may be sacrificed.
RELT Instantaneous pickup can be enabled via application of 24Vdc or Vac at the RELT input
terminals or serial communications via the Modbus communication port. The RELT input command
may be wired to a manual switch, automatic sensor or, via external logic, to one or more signal
sources. 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.
RELT harness consists of four wires for this input and output signal
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 switch may be connected to a manually operated two-position switch, a remote sensor, or
both simultaneously. The EntelliGuard TU trip unit provides a feedback capability directly from the
trip so the user is able to verify that the signal was received by the trip unit and the settings have
changed. Optionally, an indicating light may also be connected to the source of control power so the
user knows if control power is available to change the setting. The trip unit does not require its own
control power to accept a RELT input and change the Instantaneous trip pickup according to the user
settings. However, if control power is available to the trip unit, the feedback signal will function
immediately, rather than when the trip unit becomes self-powered through its load current (Fig. 1).
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Figure 1
Section 2 in this instruction manual explains the process of upgrading the LV power Circuit Breaker
from MVT (Microversatrip Plus and PM) to Entelliguard TU with RELT. Sections 3 to 7 have the
process of routing the “RELT wire harness” in different types of GE circuit breaker as supplemental to
base instruction manual.
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TABLE OF CONTENTS
Page
SECTION 1 Prior To Installation…………………………………………………..……………………………….4
SECTION 2 Installation instructions for “RELT wire harness kit” GTURHA.……………….5
SECTION 3 Supplement to GEH – 5965…………….…………………………………………………………..8
SECTION 4 Supplement to GEH – 5966…………….…………………………………………………………..10
SECTION 5 Supplement to GEH – 5967…………….…………………………………………………………..12
SECTION 6 Supplement to GEH – 5964…………….…………………………………………………………..14
SECTION 7 Supplement to GEH – 6466…………….…………………………………………………………..16
SECTION 8 Supplement to DEH-40008 & DEH-40009..………………………………………………..19
SECTION 9 Supplement to GEH-6293, GEH-6294, GEH-6295, GEH-6433, DEH-40019 &
DEH-133..…………………………………………………………………………………………………....21
SECTION 10 Supplement to GEH-6318, GEH-6319, GEH-6320 & DEH-023.………………....23
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SECTION 1 Prior To Installation
1. Before starting any work, turn off and lock out all power sources leading to the breaker, both
primary and secondary. Remove the breaker to a clean, well-lighted work area.
WARNING: Low-voltage power circuit
breakers use high-speed, stored-energy
spring operating mechanisms. The breakers
and their enclosures contain interlocks and
safety features intended to provide safe,
proper operating sequences. For maximum
personnel protection during installation,
operation, and maintenance of these
breakers, the following procedures must be
followed. Failure to follow these procedures
may result in personal injury or property
damage.
2. Only qualified persons, as defined in the National Electrical Code, who are familiar with the
installation and maintenance of low-voltage power circuit breakers and switchgear assemblies, should perform any work on these breakers.
3. Completely read and understand all instructions before attempting any breaker installation,
operation, maintenance, or modification.
4. Turn off and lock out the power source feeding the breaker before attempting any installation,
maintenance, or modification. Follow all lock-out and tag-out rules of the National Electrical
Code and all other applicable codes.
5. Do not work on a closed breaker or a breaker with the closing springs charged. Trip the
breaker OPEN and be sure the stored-energy springs are discharged, thus eliminating the
possibility that the breaker may trip open or the closing springs discharge and cause injury.
6. Trip the breaker OPEN, then remove the breaker to a well-lighted work area before beginning
work.
7. Do not perform any maintenance that includes breaker charging, closing, tripping, or any
other function that could cause significant movement of a draw-out breaker while it is on the
draw-out extension rails.
8. Do not leave the breaker in an intermediate position in the switchgear compartment. Always
leave it in the CONNECTED, TEST, or DISCONNECTED position. Failure to do so could lead to
improper positioning of the breaker and flashback.
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SECTION 2 Installation instructions for “RELT wire harness kit” (Catalogue Number – GTURHA)
For GE type AK, AKT, AKS, AKU, AKJ, AKR, AKRU, AKRT, AKJT, AKW
Low Voltage Power Circuit Breakers.
Installing the RELT wire harness
1. Remove the existing MVT trip unit from breaker by pressing
the lever on side of trip unit mounting plate and gently pull
the trip unit toward yourself as facing the breaker,.
Figure 2
2. Loosen the three screws with screwdriver as shown in
figure 3.
Save the screws, washer and nut for mounting back the
plate later.
Figure 3
3. Rotate the mounting plate from frame, being careful not to
pull on existing wires.
Figure 4
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Wire
Slot in 36
connect
Functio
35 24 V DC
+
White
36
2
4 V DC
-
4. Take the “RELT wire harness” (4 wire harness) provided
with kit and insert the pins at the end of wire to respective
terminal on 36-pin connector.
Individual wires in harness are color coded and numbered.
The pins should be inserted at correct places on backside
of 36-pin connector. Refer figure 7 and table 1.
Table 1
Figure 5
Wire Colour
Red 4 Input +
Yellow 2 Input -
Black 30 Output +
White 27 Output -
Slot in 36 pin
connector
Function
5. The control power supply voltage to trip unit shall be
given through wires 1 and 2 of communication harness
already installed in breaker or supplied.
In case when communication wire harness is not
installed on the breaker, use the power supply harness (2
wire harness) supplied with the kit.
Individual wires in power supply harness are color coded
and numbered. The pins should be inserted at correct
places on backside of 36-pin connector. Refer table 2.
Table 2
Black
Figure 6
Figure 7
Figure 8
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6. Tie these extra four wires (or 6 wires) with other
wires at back of 36-pin connector properly.
Inspect the 36-pin connector from front side of
plate for extra four connectors installed.
7 Take the earlier removed sets of screws, washers and
nuts.
Figure 9
Install the mounting plate again on frame by
tightening the screws at three locations.
Figure 10
9. Route the RELT & power supply wire harnesses as
instructed in following section 2 to section 6 depends
on breaker type.
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