GE Power Break User manual

gPower Break® Circuit Breakers
800–2000 A Frames, 240–600 Vac
GEH–469 D
User’s Guide

i
GEH–4693D
WARNINGS, CAUTIONS, AND NOTES
AS USED IN THIS PUBLICATION
WARNINGS
Warning notices are used in this publication to emphasize that hazardous voltages, currents, or
other conditions that could cause personal injury or death are present in this equipment or may be
associated with its use.
Warning notices are also used for situations in which inattention or lack of equipment knowledge
could cause either personal injury or damage to equipment.
CAUTIONS
Caution notices are used for situations in which equipment might be damaged if care is not taken.
NOTES
Notes call attention to information that is especially significant to understanding and operating
the equipment.
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 varia-
tions 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 pres-
ent in all hardware and software systems. GE Industrial Systems assumes no obligation of notice to
holders of this document with respect to changes subsequently made.
GE Industrial Systems 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.
The following are trademarks of GE Company:
Power Break®, MicroVersaTrip Plus™ , MicroVersaTrip PM™, MagneTrip™, MicroVersaTrip®
© 1998 GE Company
All Ri
g
hts Reserved

Power Break® Circuit Breakers
Table of Contents
ii
Chapter 1. Receiving and Installation
1–1 Overview................................................................................................................................1
1–2 Receiving the Breaker ............................................................................................................. 1
Storage ............................................................................................................................ 1
1–3 Installation............................................................................................................................. 1
Bolted Electrical Connections............................................................................................ 1
Breaker Mounting............................................................................................................. 1
Chapter 2. Breaker Operation
2–1 Standard Features................................................................................................................... 3
2–2 Operating Instructions............................................................................................................ 3
Sequence of Operations..................................................................................................... 3
Operating Instructions for Manually Charged Breakers........................................................ 4
Operating Instructions for Electrically Charged Breakers ..................................................... 4
Wiring Notes .................................................................................................................... 5
Application Notes ............................................................................................................. 6
2–3 Trip Unit Setup ...................................................................................................................... 6
MicroVersaTrip® and MicroVersaTrip® RMS-9 Trip Units.................................................. 6
MagneTrip™ Trip Units.................................................................................................... 9
MicroVersaTrip Plus™ and MicroVersaTrip PM™ Trip Units............................................... 9
Chapter . Accessories
3–1 Introduction .........................................................................................................................10
3–2 Circuit Breaker Cover.............................................................................................................10
Breaker Cover Removal ....................................................................................................10
Breaker Cover Reassembly ................................................................................................11
3–3 Shunt Trip Device..................................................................................................................12
Mounting Plate Removal ..................................................................................................12
Shunt Trip Installation.....................................................................................................13
Mounting Plate Installation ..............................................................................................13
3–4 Undervoltage Release Device ..................................................................................................14
UVR Installation..............................................................................................................14
3–5 Blown-Fuse Trip Device..........................................................................................................15
Blown-Fuse Trip Device Installation...................................................................................16
3–6 Auxiliary Switch.....................................................................................................................16
Auxiliary Switch Installation .............................................................................................17
3–7 Remote Close Solenoid and Remote Charge Indication ............................................................18
3–8 Optional Features ..................................................................................................................18
Limited Close Access Button.............................................................................................18
Padlock Function.............................................................................................................19
Chapter 4. Maintenance
4–1 Inspections............................................................................................................................20
4–2 Lubrication...........................................................................................................................20

Power Break® Circuit Breakers
List of Figures and Tables
iii
Figures
1. Circuit breaker with lifting straps in place. ............................................................................................... 1
2. Location of mounting bolt inserts on 800 A frame breakers ....................................................................... 1
3. Location of mounting bolt inserts on 1600–2000 A frame breakers............................................................. 2
4. Manually charged breaker. ..................................................................................................................... 3
5. Motor operator-charged breaker. ............................................................................................................ 3
6. Motor operator charged breaker with the top cover removed..................................................................... 3
7. Bell alarm wiring to prevent continuous cycling of the automatic charging mechanism. .............................. 5
8. Wiring for optional bell alarm lockout applications................................................................................... 5
9. Tap changer cards. ................................................................................................................................6
10. Cover and trip unit removed from the breaker ......................................................................................... 7
11. Neutral CT connection for four-wire ground fault..................................................................................... 7
12. Wiring diagram for MicroVersaTrip and MicroVersaTrip RMS-9 trip units with ground fault on a
top-fed four-wire load. ............................................................................................................................ 8
13. Wiring diagram for MicroVersaTrip and MicroVersaTrip RMS-9 trip units with ground fault on a
bottom-fed four-wire load. ...................................................................................................................... 8
14. Releasing the trip unit interlock to remove or install the trip unit............................................................... 8
15. Aligning the trip unit to the mounting plate. ........................................................................................... 9
16. Adjusting the settings on a MagneTrip trip unit........................................................................................ 9
17. 800 A frame electrically operated breaker................................................................................................10
18. 1600–2000 A frame electrically operated breaker. ....................................................................................11
19. 1600–2000 A frame electrically operated breaker with the outer cover removed..........................................11
20. Wire ties on the accessory leads and mounring plate insulator. .................................................................11
21. Crossbar hook engaging the drive hook. .................................................................................................11
22. Shunt trip device with cut-off switch........................................................................................................12
23. Shunt trip wiring diagram. ....................................................................................................................12
24. Locations of the mounting plate retaining screws, isolation barrier, and molded drive crank.......................12
25. Shunt trip coil position with no blown-fuse trip device..............................................................................13
26. Shunt trip coil position with blown-fuse trip device. .................................................................................13
27. Attaching the switch bracket to the arm stop. ..........................................................................................13
28. Undervoltage release device...................................................................................................................14
29. Dropping resistor supplied with 240–600 V UVRs.....................................................................................14
30. UVR wiring diagram. ............................................................................................................................14
31. Slide reset lever and spring on the mounting plate...................................................................................15
32. Positioning the UVR assembly on the mounting plate..............................................................................15
33. Installing the UVR mounting screw. .......................................................................................................15
34. Blown-fuse trip device accessory..............................................................................................................15
35. Blown-fuse trip device wiring diagram.....................................................................................................16
36. Auxiliary switch. ...................................................................................................................................16
37. Auxiliary switch wiring diagram. ............................................................................................................17

Power Break® Circuit Breakers
List of Figures and Tables
iv
38. Trip unit removed from the breaker. ......................................................................................................17
39. Installing the auxiliary switch assembly. ..................................................................................................17
40. Securing the auxiliary switch assembly. ...................................................................................................17
41. Wiring diagram for remote charge indication. ........................................................................................18
42. Wiring diagram for remote charge indication with remote close solenoid..................................................18
43. Limited close access button....................................................................................................................18
44. OFF button padlock with panel door interlock. .......................................................................................19
45. Defeating the OFF button padlock. ........................................................................................................19
Tables
1. Weights of the various breaker frame sizes, with and without a motor operator............................................ 1
2. Bolt sizes and mounting torques for bus connections. ............................................................................... 1
3. Sequence of operations that may be performed with Power Break circuit breakers....................................... 4
3. Application data for control power.......................................................................................................... 5
4. Accessory lead color codes .....................................................................................................................10
5. Shunt Trip electrical characteristics........................................................................................................12
6. UVR electrical characteristics.................................................................................................................14
7. Auxiliary switch electrical characteristics.................................................................................................17
8. Catalog numbers and ratings for the remote close solenoid ......................................................................18

Power Break® Circuit Breakers
Chapter 1. Receiving and Installation
1
1–1 Overview
The Power Break® line of insulated-case circuit breakers
is designed to protect low-voltage power circuits and
equipment. Current models are offered with Magne-
Trip™, MicroVersaTrip Plus™, and MicroVersaTrip PM™
trip units for fault detection.
1–2 Receiving the Breaker
Unpack the circuit breaker and inspect it for shipping
damage. Ensure that the breaker has the proper current,
voltage, and interruption ratings for the application.
The weights of the various frame sizes are listed in Table
1, for reference. Figure 1 shows a breaker with straps for
lifting.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Do not attempt to lift the circuit breaker by
its operating handle.
Frame
Rating, A Type Weight, lbs
800 Manual
Electric
50
64
1600 Manual
Electric
82
96
2000 Manual
Electric
88
102
Table 1. Weights of the various breaker frame sizes, with and
without a motor operator.
Figure 1. Circuit breaker with lifting straps in place.
Storage
The breaker should be placed in service immediately in its
permanent location. However, if it must be stored for an
indefinite period, it should be carefully protected against
condensation, preferably by storage in a warm, dry room.
Circuit breakers for outdoor equipment should be stored
in that equipment only when power is available and heat-
ers are in operation, to prevent condensation.
The breaker should be stored in a clean location, free
from corrosive gases or fumes. In particular, protect the
breaker from moisture and cement dust, as that combina-
tion may be corrosive.
If the breaker is stored for any length of time, it should be
inspected periodically to ensure good mechanical condi-
tion.
1– Installation
Bolted Electrical Connections
Using an industry-accepted solvent, remove any foreign
material from the line and load strap surfaces and the
corresponding surfaces of connecting bus and terminal
studs. Ensure that the mating surfaces are smooth and
free of burrs and nicks.
Place the bus connections in position and align the
mounting holes. Insert and fasten the mounting bolts and
washers according to the specifications in Table 2.
B s Connection
Breaker Frame, A Bolt Dia. Torq e, in-lbs
800 (1) 1/2in 300
1200–1600 (2) 1/2in 300
2000 (4) 1/2in 300
Table 2. Bolt sizes and mounting torques for bus connections.
Breaker Mounting
For mounting the circuit breaker, use the four 1/4-20 x1/2-
inch-deep inserts in the back of the breaker. The locations
of the inserts are shown in Figures 2 and 3 for the two
frame sizes. Tighten the mounting bolts to 50 in-lb.
Figure 2. Location of mounting bolt inserts on 800 A frame breakers.

Power Break® Circuit Breakers
Chapter 1. Receiving and Installation
2
Figure 3. Location of mounting bolt inserts on 1600–2000 A frame
breakers.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
3
2–1 Standard Features
Power Break circuit breakers are equipped with the follow-
ing standard features. The letters are keyed to the breaker
illustrations in Figures 4, 5, and 6.
AA
AA Indicator ON – Red
CHG (manual) – yellow
CHARGED (electrical) – yellow
OFF – Green
BB
BB ON button
CC
CC OFF button
DD
DD Manual charging handle
EE
EE Lockable manual charge engagement button (motor
operated only)
FF
FF Terminal board (motor operator drive unit)
GG
GG Removable protective window
JJ
JJ CT tap setting indicator (MicroVersaTrip only)
KK
KK Removal protective trip unit cover (Magnetrip™
only)
LL
LL Cover mounting screws (four)
MM
MM Midcover mounting screws (three – motor operated
only)
NN
NN MicroVersaTrip RMS-9 trip unit interchangeable rat-
ing plug
OO
OO Motor operator control circuit fuses
PP
PP MicroVersaTrip RMS-9 test set connection port
Figure 4. Manually charged breaker.
Figure 5. Motor operator-charged breaker.
Figure 6. Motor operator charged breaker with the top cover
removed.
2–2 Operating Instructions
Sequence of Operations
The sequence of operations that may be performed on the
circuit breaker is listed in Table 3.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
4
Indicator Main Breaker Contacts Condition of Charging Springs Next Permissible Operating F nction
OFF Open Discharged Mechanism may be charged
CHARGED / CHG Open Fully Charged Contacts may be closed
ON Closed Discharged Contacts may be opened
Table 3. Sequence of operations that may be performed with Power Break circuit breakers.
Operating Instructions for Manually
Charged Breakers
Charging the Mechanism Springs
Rotate the operating handle counter-clockwise until the
handle stops (about 120° ). Rotate the handle clockwise
back to its home position. This operation will NOT close
the contacts and turn the breaker ON . The indicator will
display CHG.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
If the breaker latch is held in the tripped
position by any of the following accessories, the
mechanism springs will discharge at the end of the
charging stroke and the breaker will revert to the OFF
condition.
• The key interlock or padlock is in the locked OFF con-
dition.
• On a draw-out breaker, the draw-out interlock is
engaged with the carriage in any position except TEST
or ENGAGED.
• The bell alarm lockout was not reset after an overcur-
rent lockout.
• The undervoltage release is not energized.
These conditions must be corrected before the breaker
can be closed. Failure to do so may result in equipment
damage.
Closing the Breaker
Close the breaker contacts with either of the following
methods:
• Depress the ON button on the breaker escutcheon.
• Energize the (optional) remote close accessory by
connecting terminal 5 to terminal 6.
Opening the Breaker
Open the breaker contacts with either of the following
methods:
• Depress the PUSH OFF button on the breaker
escutcheon.
• Energize the (optional) shunt trip accessory or deen-
ergize the (optional) undervoltage release accessory.
Operating Instructions for Electrically
Charged Breakers
Charging the Mechanism Springs
Charge the mechanism springs with either of the follow-
ing methods:
• Local
– Depress the lockable manual charge engagement
button until it is flush with the handle surface.
Slight rotation of the handle may be necessary to
fully depress the button in order to align the
internal coupling.
– Hold the button down and rotate the operating
handle counter-clockwise until the handle stops
(about 120°). Rotate the handle clockwise back to
its home position. This operation will NOT close
the contacts and turn the breaker ON . The
indicator will display CHARGED.
• Remote – Connect terminal 3 to terminal 4 to
energize the motor operator mechanism.
Closing the Breaker
Close the breaker contacts with either of the following
methods:
• Depress the ON button on the breaker escutcheon.
• Energize the (optional) remote close accessory by
connecting terminal 5 to terminal 6.
Opening the Breaker
Open the breaker contacts with either of the following
methods:
• Depress the PUSH OFF button on the breaker
escutcheon.
• Energize the (optional) shunt trip accessory or deen-
ergize the (optional) undervoltage release accessory.
Automatic Operation
For automatic closing of the breaker when the springs are
charged, permanently connect terminal 5 to terminal 6.
The breaker will close as soon as the charging cycle is
complete.
For automatic charging of the closing springs, perma-
nently connect terminal 3 to terminal 4. The springs will

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
5
charge as soon as the breaker is opened, whether from a
fault trip or from being intentionally opened.
CC
CCAA AAUU UUTT TTII IIOO OONN NN
:::: Do not wire breakers for both automatic
charge and automatic close unless a bell alarm with
overcurrent lockout is incorporated. Otherwise, the
breaker may repeatedly close into an overcurrent fault.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
The bell alarm lockout and undervoltage
release both hold the breaker latch open when activated.
To prevent continuous cycling (see Application Notes)
when the breaker is wired for automatic charging, inter-
connect the bell alarm switch to the motor operator ter-
minal board as shown in Figures 7 and 8.
NN
NNOO OOTT TTEE EE::::
The motor operator contains a feature that shuts
off control power if the OFF button is held depressed.
Thus, electrical operation is prevented if a key interlock
or padlock accessory is applied in the breaker OPEN con-
dition. If the breaker is equipped with a draw-out inter-
lock (TPDO-1), electrical operation is permitted only if
the draw-out carriage is in the ENGAGED or TEST posi-
tion.
Figure 7. Bell alarm wiring to prevent continuous cycling of the
automatic charging mechanism.
Figure 8. Wiring for optional bell alarm lockout applications.
Wiring Notes
Observe the following notes when wiring the breaker for
operation:
• Customer-supplied contacts (such as CHARGE and
CLOSE) should be momentary action, rated for 0.25
A at 125 Vdc for dc motor operators or rated for 3 A
at 120 Vac for ac motor operators.
• Do not apply power to any terminal board point
other than points 1 and 2.
• Observe the proper polarity for dc motor operators
(point 1 is positive).
• When performing hi-pot or dielectric tests:
– Remove all power leads, both control and power.
– Short all motor operator terminal board points.
– Open the circuit breaker.
– Test between the motor operator terminal board
points and the load side of the breaker’s center
pole (this pole is connected to the frame).
– Test at 2200 Vac for one minute using a current-
limited, nondestructive ac hi-pot tester with
maximum output of 20 mA.
O
p
eratin
g
Motor C rrent, A Close Nominal Maxim m Maxim m
Rated
Voltage Voltage Range Locked Rotor F ll Load Average Solenoid, peak A F ses (Slo Blo 125 V) Charge Time , s Close Time, s Opening Time, s
120 Vac 102–132 8 2.5 1.5 3.0 2 A 5.0 0.83 0.05
125 Vdc 100–140 10 2.5 1.5 3.5 2 A 6.0 0.83 0.05
72 Vdc 57–81 13 3.0 2.0 5.0 3 A 6.0 0.83 0.05
48 Vdc 38–58 20 5.0 2.5 6.6 4 A 6.0 0.83 0.05
24 Vdc 19–29 24 7.0 3.0 13.2 6.25 A 7.5 0.83 0.05
Table 3. Application data for control power.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
6
Application Notes
• Size the control power source according to the
information in Table 3. If a single source is to supply
several motor operators, it must be sized appropri-
ately. Where breakers are wired for automatic
charge, it may be necessary to supply power to several
motor operators simultaneously during start up.
• The control power source should be sized so that the
drop in voltage from no load to full load does not
exceed 7%.
• Acceptable dc power sources are the following:
– dc generator,
– battery,
– three-phase, full-wave rectified ac, or
– any other dc power source with a peak-to-peak
ripple voltage of not more than 15% of the rated
voltage at motor full-load current.
• Breakers built after approximately June 1978 are
equipped with an anticycling circuit that will lock out
the breaker if the latch fails to reset (such as due to a
deenergized UVR). Lockout occurs if the charge
time exceeds 20 seconds. Reset a locked-out breaker
locally by pushing the OFF button or remotely by
momentarily removing control power from the
motor operator.
2– Trip Unit Setup
NN
NNOO OOTT TTEE EE::::
MicroVersaTrip RMS-9 trip unit rating plugs may
be changed per GEH-5369 and GEH-5371 without void-
ing the UL listing. MicroVersaTrip trip units and tap
changer cards may be installed or replaced per GEH-
4657 and this manual without voiding the UL listing.
MicroVersaTrip Plus and MicroVersaTrip PM trip units
and rating plugs may be changed or replaced per GEH-
6273 without voiding the UL listing.
MicroVersaTrip® and MicroVersaTrip®
RMS-9 Trip Units
Trip settings are installed at the factory with minimum
values on all functions. Customers will generally want to
adjust settings to their own requirements.
Adjusting Trip Settings
Use the following procedure to adjust trip settings on
these trip units:
11
11.... Remove the clear plastic protective window, shown in
Figure 4.
22
22.... Change the settings by twisting the indicator switches
to the desired values or multipliers. See GEH-4657 for
definitions of MicroVersaTrip functions and GEH-
5369 for MicroVersaTrip RMS-9 functions.
33
33.... Reinstall the window.
Rating Plugs
MicroVersaTrip RMS-9 trip units require the installation
of a rating plug in accordance with GEH-5369 and GEH-
5371 to set the maximum continuous current rating.
Tap Changer Card
Some MicroVersaTrip models include a tap changer card,
shown in Figure 9. When provided, this function allows
the customer to change the rating of the breaker frame.
Figure 9. Tap changer cards.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
7
All breakers provided with tap cards are shipped with both
HIGH (100% of the current rating Sensor Amp on the
breaker name plate) and low (50–75% of the current
rating Sensor Amp on the breaker name plate). The low
card is packed and supported on the breaker handle. The
high card is installed in the breaker frame. To change
settings use the following procedure:
WW
WWAA AARR RRNN NNII IINN NNGG GG::::
The circuit breaker must be removed from
the electrical system before attempting any operations
that involve removing the breaker’s cover.
11
11.... Turn the breaker o .
22
22.... Remove the four cover mounting screws and remove
the top cover. On motor operator-equipped breakers,
remove only the top cover.
33
33.... Withdraw the card from the tap changer support and
replace with the other card, as shown in Figure 10.
The print on the top of the card should be oriented
the same as the breaker cover name plate.
Figure 10. Cover and trip unit removed from the breaker.
44
44.... Trip units providing ground fault protection must
also have the tap setting changed on the tapped neu-
tral CT (four-wire systems). Change the black wire
lead from the high or low terminal to match the
desired tap setting of the breaker frame, as shown in
Figure 11.
55
55.... Replace the breaker cover.
66
66.... Operate the breaker manually through the
charge–close–open cycle to ensure that the breaker is
properly functioning mechanically before energizing
or connecting it to the electrical system.
NN
NNOO OOTT TTEE EE::::
A deenergized undervoltage release will not allow
the mechanism to charge and close.
77
77.... Store the extra tap card in a convenient place.
Figure 11. Neutral CT connection for four-wire ground fault.
Neutral Current Transformer (Four-Wire Ground
Fault System)
Ground fault protection is offered as an optional function
of the MicroVersaTrip® trip unit. However, all MicroVer-
saTrip-generation breaker frames are provided with ter-
minal board points for connection to a neutral CT. Do
not short these terminals if there is no neutral CT
connected.
Always match the rating of the CT to the rating of the cir-
cuit breaker; specifically, use the following criteria:
• Fixed-rated breaker frames – match the neutral CT
amp rating to the breaker sensor amp rating.
• Tapped or high/low-rated breaker frames – match
the neutral CT amp rating to the high/low setting of
the breaker sensor amp rating.
Note that MicroVersaTrip RMS-9-equipped breakers are
not available with inverted construction (formerly desig-
nated by Cat. No. suffix B). These breakers may be either
top fed, as illustrated in Figure 12, or bottom fed, as illus-
trated in Figure 13.
NN
NNOO OOTT TTEE EE::::
The neutral CT is mounted in reverse in Figure
13 when the breaker is bottom (reverse) fed.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Match the tapped terminal for the black lead
to the tap setting, if provided, on the breaker frame.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Observe the polarity markings on the neutral
CT shell and the breaker frame.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
When a neutral CT is not used or not
required (three-wire ground fault), do not short the
ground fault terminal points on the breaker frame.
Leave them open as supplied by the factory.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
8
Figure 12. Wiring diagram for MicroVersaTrip and MicroVersaTrip
RMS-9 trip units with ground fault on a top-fed four-wire load.
Figure 13. Wiring diagram for MicroVersaTrip and MicroVersaTrip
RMS-9 trip units with ground fault on a bottom-fed four-wire load.
MicroVersaTrip RMS-9 Trip Units
The trip units on MicroVersaTrip RMS-9-equipped break-
ers are not interchangeable. The breaker rating may be
adjusted by changing the rating plug installed in the face
of the trip unit. See GEH-5369 and GEH-5371 for instruc-
tions.
MicroVersaTrip Trip Units
MicroVersaTrip-equipped breakers were ordered complete
or as a frame and trip unit only. Some trip units and
frames have rejection schemes to prevent mismatching of
functions.
The limits of interchangeability are as follows:
• High short-time or H-function trip units may not be
used in frames that are not wired for H function
(special CTs).
• Special trip units for AK breakers with the M (no
instantaneous) function may not be used with Power
Break breakers.
Refer to GEH-4657 for installation or replacement of
MicroVersaTrip trip units with remote overload indication
and for recommended wiring for zone-selective interlock.
To change or install trip units without remote indication,
use the following procedure.
WW
WWAA AARR RRNN NNII IINN NNGG GG::::
The circuit breaker must be removed from
the electrical system before attempting any operations
that involve removing the breaker’s cover.
11
11.... Remove the four cover-mounting screws and remove
the top cover. On motor-operated breakers, remove
only the top cover to replace the trip unit.
22
22.... Remove the trip unit as follows:
aa
aa.... Push in the trip unit-cover interlock, as illustrated
in Figure 14.
bb
bb.... Lift the trip unit off the mounting plate and ter-
minal plug.
cc
cc.... The trip unit-cover interlock will now swing out
and lock over the base to prevent reinstallation of
the breaker cover when no trip unit is installed.
Figure 14. Releasing the trip unit cover interlock to remove or install
the trip unit.

Power Break® Circuit Breakers
Chapter 2. Breaker Operation
9
33
33.... Install the replacement trip unit as shown in Figure
15:
aa
aa.... Align the holes in the bottom of the trip unit with
the guide pins in the mounting plate. Lower the
trip unit until it is fully down on the mounting
plate and the connecting plug is secure.
bb
bb.... Push in the trip unit-cover interlock until it locks
in place, as shown in Figure 14.
NN
NNOO OOTT TTEE EE::::
The trip unit has a stud on the bottom to defeat
the trip unit-cover interlock locking spring.
Figure 15. Aligning the trip unit to the mounting plate.
44
44.... Replace the top cover and secure with the four cover-
mounting screws.
55
55.... Operate the breaker manually through the
charge–close–open cycle to ensure that the breaker is
properly functioning mechanically before energizing
or connecting it to the electrical system.
NN
NNOO OOTT TTEE EE::::
A deenergized undervoltage release will not allow
the mechanism to charge and close.
66
66.... For trip units with ground fault, a neutral CT must be
provided if a four-wire system is to be used. See the
section on neutral CTs for instructions and precau-
tions. Do not short the ground fault terminals pro-
vided on the breaker frame if a neutral CT is not
used.
MagneTrip™ Trip Units
Use the following procedure to change trip settings on
MagneTrip trip units:
11
11.... Remove the protective trip unit cover.
22
22.... Change the trip setting by rotating the plastic buttons
in the base with a screw driver, as shown in Figure 16.
33
33.... Replace the protective cover.
Figure 16. Adjusting the settings on a MagneTrip trip unit.
MicroVersaTrip Plus™ and MicroVersaTrip
PM™ Trip Units
See GEH-6273 for detailed instructions for setting up
MicroVersaTrip Plus and MicroVersaTrip PM trip units.

Power Break® Circuit Breakers
Chapter 3. Accessories
10
–1 Introduction
These instructions cover the field installation of internally
mounted electrical accessories. They are UL listed for use
in all 800–2000 A frame Power Break® circuit breakers
with MicroVersaTrip® trip units. These accessories may
also be installed in 800–1600 A frame Power Break break-
ers with MagneTrip™ trip units, but the UL listing is
voided.
The control leads of internally mounted accessories exit in
pigtail form from the side of the breaker. These leads are
terminated at the secondary disconnect points of draw-out
breakers or at optional terminal blocks when specified for
stationary-mounted breakers. All leads are color coded as
listed in Table 4.
Accessory Lead Color No. of Leads
Shunt Trip Black 2
Undervoltage
Release
Blue 2
Auxiliary Switch
White – common
Red – OPEN (NO)
Brown/White – CLOSED (NC)
3 per
switch
Bell Alarm
(Overcurrent
Lockout)
Yellow – common
Purple – CLOSED (NC)
Brown – OPEN (NO)
3
Blown-Fuse Trip
(3-Coil Shunt Trip)
Line End Load End Phase
Red Brown-White A
Blue White B
Yellow Black C
6
Closing Solenoid
(Manual Breakers
only)
White – common
Black – remote indication
Orange – remote close
3
Table 4. Accessory lead color codes.
–2 Circuit Breaker Cover
Before any accessories can be installed in a Power Break
circuit breaker, the cover(s) must be removed, as
described in the following sections.
WW
WWAA AARR RRNN NNII IINN NNGG GG::::
Before installing any accessories, completely
de-energize the circuit breaker and disconnect it from
the electrical circuit. This is mandatory, since the
breaker must be ON during certain stages of installation
and testing.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Do not turn the breaker upside down, since
loose parts may become lost.
NN
NNOO OOTT TTEE EE::::
All breakers are equipped with mechanical inter-
locks that automatically trip the breaker when the cover
is removed with the breaker closed.
Breaker Cover Removal
Manual Breaker
Use the following procedure to remove the cover of a
manually operated breaker:
11
11.... Press the o button to open the circuit breaker.
22
22.... Remove the four cover-mounting screws.
33
33.... Remove the breaker cover.
Electrically Operated Breaker
Use the following procedure to remove the cover of an
electrically operated breaker. An 800 A frame breaker is
shown in Figure 17 and a 1600–2000 A frame breaker is
shown in Figure 18.
11
11.... Press the o button to open the circuit breaker.
22
22.... Disconnect all external leads from the terminal
board.
33
33.... Remove the four cover mounting screws.
44
44.... Remove the outer cover.
55
55.... On 1600-2000 A framer breakers only, remove the two
inner-cover mounting screws, as shown in Figure 18.
66
66.... Loosen the captive inner-cover lock screw, as shown
in Figure 19.
77
77.... Remove the inner cover.
Figure 17. 800 A frame electrically operated breaker.

Power Break® Circuit Breakers
Chapter 3. Accessories
11
Figure 18. 1600–2000 A frame electrically operated breaker.
Figure 19. 1600–2000 A frame electrically operated breaker with the
outer cover removed.
Breaker Cover Reassembly
Manually Operated Breakers
11
11.... Verify that all connections are secure and the breaker
is free of debris.
22
22.... Verify that the breaker is o .
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Verify that the accessory mounting plate
insulator, shown in Figure 20, is properly located so it
will not be damaged when the cover is replaced. The
cover phase barrier must pass to the right side of this
insulator.
33
33.... Position the charging handle at the home position (6
o’clock) on the cover. Align the cover mounting
screw holes with the breaker base and install the four
cover screws. Tighten the screws to 50–60 in-lbs.
Figure 20. Wire ties on the accessory leads and mounting plate
insulator.
Electrically Operated Breakers
11
11.... Verify that all connections are secure and the breaker
is free of debris.
CC
CCAA AAUU UUTT TTII IIOO OONN NN::::
Verify that the accessory mounting plate
insulator is properly located, as shown in Figure 26.
22
22.... Slide the inner cover assembly onto the breaker base.
Ensure that the crossbar hook engages the drive stud,
as shown in Figure 21.
Figure 21. Crossbar hook engaging the drive hook.
33
33.... Tighten the inner cover lock screw, shown in Figure
19, to 10 in-lbs.
44
44.... On 1600–2000 A frame breakers only, replace the two
inner cover mounting screws and tighten to 50–60 in-
lbs.

Power Break® Circuit Breakers
Chapter 3. Accessories
12
55
55.... Position the charging handle at the home position (6
o’clock) on the outer cover. Align the outer cover-
mounting screw holes with those on the inner cover
and install the four cover-mounting screws. Tighten
to 50–60 in-lbs.
NN
NNOO OOTT TTEE EE::::
Ensure that the control terminal board properly
engages the cover retaining slots.
66
66.... Connect the control and power wiring as per the
instructions supplied with the circuit breaker.
– Shunt Trip Device
The shunt trip, shown in Figure 22, allows the breaker to
be tripped electrically from a remote location. A cut-off
switch is supplied as part of the shunt trip to automatically
remove power from the shunt trip coil when the breaker is
tripped. The electrical characteristics of the shunt trip are
listed in Table 5. Figure 23 is the shunt trip wiring dia-
gram.
Figure 22. Shunt trip device with cut-off switch.
Catalog No. Voltage Rating Max. Inr sh C rrent, A
TPST 12S 120 Vac
240 Vac
2.25
4.50
TPST13S 480 Vac
600 Vac
1.64
2.05
TPST7S 12 Vdc 4.00
TPST8S 24 Vdc 2.18
TPST9S 48 Vdc 1.09
TPST10S 125 Vdc 1.00
TPST11S 250 Vdc 0.21
Table 5. Shunt Trip electrical characteristics.
Figure 23. Shunt trip wiring diagram.
Mounting Plate Removal
The mounting plate is used as the anchor position for the
shunt trip, blown-fuse trip, and undervoltage release
accessories. Breakers are shipped from the factory with
either a mounting plate or an L-shaped bracket to retain
the molded-plastic crank. A new mounting plate is pro-
vided in the shunt trip kit, blown-fuse trip kit, undervol-
tage release kit, and auxiliary switch kit.
• If the breaker was supplied with an L-shaped bracket,
remove the two retaining screws, discard the bracket,
and skip to the appropriate installation instructions.
• If the breaker was supplied with a mounting plate,
remove it with the following procedure:
11
11.... Remove the three mounting plate retaining screws
and the isolation barrier, shown in Figure 24.
22
22.... Lift out the accessory mounting plate and remove the
molded drive crank.
33
33.... If a tap changer was supplied, remove the two screws
from the phenolic block before removing the mount-
ing plate.
Figure 24. Locations of the mounting plate retaining screws, isolation
barrier, and molded drive crank.

Power Break® Circuit Breakers
Chapter 3. Accessories
13
Shunt Trip Installation
NN
NNOO OOTT TTEE EE::::
If the shunt trip is being replaced because of a
defective coil, the cause of the initial failure should first
be determined. If necessary, consult the factory for fur-
ther guidance.
11
11.... Assemble the coil to the mounting plate as shown in
Figure 25. If a blown-fuse trip device is also to be
installed on the mounting plate, mount the shunt
trip coil as shown in Figure 26.
22
22.... When a blown-fuse trip device is included, place the
shunt trip plunger stop nut in contact with the
plunger of the blown-fuse trip device.
33
33.... Depress the actuator on the cut-off switch. Align the
tapped holes in the switch bracket with the holes in
the arm stop (left pole) and secure with #8-32 ×9/16
screws and lock washers, as shown in Figure 27.
Tighten to 23 in-lbs torque.
44
44.... Remove the knockouts in the side of the base, as
required. Each knockout will accommodate up to
three bundles of wire. Remove all sharp edges with a
file.
55
55.... Clean all debris from the inside of the breaker.
NN
NNOO OOTT TTEE EE::::
Shunt trip coils rated at 12 Vdc or 24 Vdc must be
mounted in the position nearest the latch. These coils
may not develop enough force to drive both the latch
and the blown-fuse trip device.
Figure 25. Shunt trip coil position with no blown-fuse trip device.
Mounting Plate Installation
11
11.... Replace the molded drive crank onto the mechanism
drive pin, as shown in Figure 24, engaging the roll
pins into the slot in the drive crank.
Figure 26. Shunt trip coil position with blown-fuse trip device.
Figure 27. Attaching the switch bracket to the arm stop.
22
22.... Place the mounting plate in position so that its two
operating studs engage the molded drive crank, as
shown in Figure 24. Ensure that the isolating barrier
is in place.
33
33.... Attach the three retaining screws. Tighten the two
small screws to 20 in-lbs and the large screw with tub-
ing to 75 in-lbs.
44
44.... Attach wire ties to the leads and secure them to the
mounting plate, as shown in Figure 20.
55
55.... Insert the leads into the knockout in the base side
wall, ensuring that one tie is on the inside of the base
and the other is on the outside.
66
66.... Apply the descriptive label to the front of the breaker
cover.

Power Break® Circuit Breakers
Chapter 3. Accessories
14
–4 Undervoltage Release Device
The undervoltage release device (UVR), shown in Figure
28, opens the circuit breaker when the supply voltage
drops to 35–60% of its rated value. Figure 29 shows the
dropping resistor supplied with 240–600 volt UVRs. The
UVR electrical characteristics are listed in Table 6. The
UVR wiring diagram is in Figure 30.
Figure 28. Undervoltage release device.
Figure 29. Dropping resistor supplied with 240–600 V UVRs.
Figure 30. UVR wiring diagram.
Catalog
N mber Voltage Rating Contin o s C rrent, mA Dropping Resistor*
TPUV1S 120 Vac 25 none
TPUV2S 240 Vac 25 5000 ?, 25 W
TPUV2S 480 Vac 25 15,000 ?, 50 W
TPUV6S 600 Vac 25 20,000 ?, 50 W
TPUV7S 12 Vdc 211 none
TPUV8S 24 Vdc 104 none
TPUV9S 48 Vdc 54 none
TPUV10S 125 Vdc 24 none
TPUV11S 250 Vdc 24 5000 ?, 25 W
* Ohmite Type 270
Table 6. UVR electrical characteristics.
UVR Installation
11
11.... Remove the circuit breaker cover(s) as described
above in 3–2 Circuit Breaker Cover .
22
22.... The UVR assembles to a mounting plate. Not all
breakers are shipped from the factory with a mount-
ing plate. Some breakers have only an L-shaped
bracket to retain the molded-plastic crank. A mount-
ing plate is provided in the UVR kit.
• If the breaker is supplied with an L-shaped
bracket, remove the two retaining screws and dis-
card the bracket. Follow the Mounting Plate
Installation instructions and continue on to step
3.
• If the breaker is supplied with a mounting plate,
continue with step 3.
33
33.... Remove the slide reset lever spring from the mount-
ing plate, as shown in Figure 31. Be careful not to
nick or damage the spring in any way, since it will be
needed for reassembly.
44
44.... Push the latch and slide reset lever forward to pro-
vide mounting clearance for the UVR assembly.
55
55.... Position the UVR assembly mounting bracket so that
its retaining hole engages the latch pivot post, as
shown in Figure 32.
66
66.... Line up the UVR bracket’s mounting hole with the
tapped hole in the accessory mounting plate. Install
the screw and lock washer, as shown in Figure 33.
Tighten the screw to 9–11 in-lbs.
77
77.... Replace the slide reset lever spring, shown in Figure
31.
88
88.... Remove the knockouts in the side of the base, as
required. Each knockout will accommodate up to
three bundles of wire. Remove all sharp edges with a
file.
99
99.... Remove all debris from the inside of the breaker.