Instruction Leaflet
IL 29C145C
Effective April 2015
Supersedes IL 29C145B Dated 05/99
Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD,
HKD,KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and Motor Circuit Protector (MCP)
Contents
D e s c r i p t i o n Page
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation . . . . .. . . . . . . .. . . . . . . .. . . . . . . .. . . . 2
Instruction Leaflet IL 29C145C Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD, HKD,
KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and and Motor Circuit Protectors (MCP)
WARNING
DO NOT ATEMPT TO INSTALL OR PERFORM MAINTENANCE
ON QUIPMENT WHILE IT IS ENERGIZED. DEATH, SEVERE
PERSONAL INJURY, OR SUBSTANTIAL PROPERTY DAMAGE
CAN RESULT FROM CONTACT WITH ENERGIZED
EQUIPMENT. ALWAYS VERIFY THAT NO VOLTAGE IS
PRESENT BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFETY
PROCEDURES.
EATON IS NOT LIABLE FOR THE MISAPPLlCATION OR
MISINSTAlLATION OF ITS PROOUCTS.
The user is cautioned to observe all recommendations, warnings, and cautions relating to the safety of personnel and equipment as well as all general and local health and safety laws, codes, and procedures.
The recommendations and information contained herein are based on Cutler-Hammer experience and judgement, but should not be considered to be all-inclusive or covering every application or circumstance which may arise. If any questions arise, contact Eaton for further information or instructions.
1. INTRODUCTION
General Information
The low energy shunt trip (LEST) (Fig. 1-1) is designed to interface with a customer ground fault detection circuit. The LEST consists of an intermittent-rated solenoid with a plunger and a reset lever assembled to a plug-in module. The plug-in mocule is mounted in slots in the top of the trip unit and occupies the accessory cavity in the circuit breaker frame. The reset lever resets the LEST when the trip Signal is removed and the circuit breaker handle is moved to the reset (extreme OFF) position.
For this publication, the term circuit breaker shall also include molded case switch and motor circuit protector.
Depending on the model ordered, connections for the low energy shunt trip are in one of four forms. The standard wiring terminal block mounted on the same side of the base as the accessory, leads exiting the side of the base where the accessory is mounted, and leads exiting the rear of the base on the side opposite the accessory. The 18-inch long pigtail leads are labeled. For allowable locations of all accessories, refer to
Frame Book 29-103.
Note: When the walking beam interlock is used with the circuit breaker, the rear trough cannot be used for accessory pigtail leads.
install the LEST.
2. INSTALLATION
KDC circuit breakers under UL File E64983.
circuit breakers.
For sealed circuit breakers (DK, KDB), Underwriters
Laboratories, Inc. UL489 requires that internal accessories be installed at the factory. The LEST is listed for factory installation under UL File E7819.
Where local codes and standards permit and UL listing is not required, internal accessories can be this case, UL listing becomes invalid and the label should be removed.
Before attempting to install the LEST, check that the catalog number is correct and that the rating of the
The LEST, as shown in kit form in Fig. 2-1, can be installed in the right or left accessory mounting cavity of a 2-, 3-, or 4-pole thermal) trip unit, and in the left pole of circuit breakers with a
KS (electronic) trip unit. A LEST must be installed in the circuit breaker before the circuit breaker is mounted in an electrical system. To install the LEST, perform the following procedures:
Note: A circuit breaker that is mounted in an electrical system must be removed to install the accessory. To ensure correct accessory installation, the circuit breaker must be placed on a horizontal surface.
2
Fig. 1-1. Low Energy trip Installed in K-frame
Circuit Breaker
EATON CORPORATION www.eaton.com
Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD, HKD,
KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and
and Motor Circuit Protectors (MCP)
WARNING
BEFORE REMOVING A CIRCUIT BREAKER INSTALLED IN AN
ELECTRICAL SYSTEM, MAKE SURE THE CIRCUIT BREAKER
IS SWITCHED TO THE OFF POSITION AND THERE IS NO
VOLTAGE PRESENT WHERE WORK IS TO BE PERFORMED.
SPECIAL ATTENTION SHOULD BE PAID TO REVERSE FEED
APPLICATIONS. THE VOLTAGES IN ENERGIZED EQUIPMENT
CAN CAUSE DEATH OR SEVERE PERSONAL INJURY.
Note: For a new circuit breaker installation, trip unit must be installed in circuit breaker before attempting to install a
LEST. Refer to I.L. 29C603, I.L. 29C604, or I.L. 29C605 for instructions on how to install trip unit.
Instruction Leaflet IL 29C145C
Fig. 2-2. Low Energy Shunt Trip kit
Replacement
Interphase
Barrier
LEST Plug-in
Module with pigtail Leads
FREQ
VA
DC
28
0.045
Accesory identification
Label
Connection Diagram
Label (Pigtail
Leads, Shown)
Intermediate
Plungers
(2 Supplied -
Large one for
USP with KS
Trip Unit)
Fig. 2-1. Low Energy Shunt Trip kit
2-1. Switch circuit breaker to OFF position.
Note: Molded case switch trip units are not equipped with a
Push-to-Trip button, For molded case switches, omit step 2-2.
2-2. Press PUSH-TO-TRIP button to trip the operating mechanism.
2-3. Disconnect and remove circuit breaker from installation and
terminal connections.
2-4. Remove cover screws and cover.
Note: To install LEST, circuit breaker operating mechanism must be in tripped position.
WARNING
DO NOT RESET CIRCUIT BREAKER AFTER MOLDED
HANDLE IS REMOVED. CRADLE RESET PIN MAY FLY
OUT IF MECHANISM IS TRIPPED, CAUSING INJURY.
Note: The LEST must be installed with circuit breaker handle removed.
2-6. Remove handle-retaining screw and molded handle from
handle arm. (See Fig. 2-3.)
2-7. Remove interphase barrier between accessory
mounting cavity and operating mechanism.
(See Fig. 2-3.)
2-8. Install replacement interphase barrier supplied with
kit in base. (See Fig. 2-3.)
2-9. Install LEST as described in the following steps (Fig. 2-4):
Note: For LEST having rear or opposite-side exiting pigtail leads, thread leads through center trough in side of case before attempting to insert mounting bracket. Pigtail leads exiting in this manner must be eased through trough as mounting bracket is inserted into trip unit retaining slots. Use center slot for leads exiting the side of the circuit breaker.
a. Position intermediate plunger in trip unit.
Longer pin is for KS trip unit; shorter pin
is for KT trip unit.
locate recessed hole in either of the trip unit outer poles
(Fig. 2-2). Push intermediate plunger supplied with LEST in one
hole to trip the molded case switch. Remove plunger to prevent
it from falling out of recessed hole in trip unit and into molded
case switch mechanism.
Fig. 2-3. Interphase Barrier Replacement and
Intermediate Plunger Positioning
EATON CORPORATION www.eaton.com
3
Instruction Leaflet IL 29C145C
b. Press intermediate plunger into recess in trip unit, and
hold in position. Slide LEST plug-in module into slots
in trip unit (Fig. 2-4.) until spring-loaded retaining clip
snaps into trip unit. For terminal block assemblies, slide
terminal block into mounting slot on side of base as.
Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD, HKD,
KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and and Motor Circuit Protectors (MCP)
2-12. Perform mechanical check of LEST after installation: a. With circuit breaker still electrically isolated,
reset the circuit breaker.
CAUTION
THE SOLENOID PLUNGER IS HELD IN THE SEATED
POSITION BY A PERMANENT MAGNET. LIGHT
PRESSURE, NOT TO EXCEED TWO POUNDS, SHOULD
BE USED TO MOVE PLUNGER FROM THE SEATED
POSITION.
under the head of the solenoid plunger. Pry the
plunger free from the seated position inside the
solenoid and check that circuit breaker trips.
Fig. 2-4. LEST Installation
Note: Before next step, be sure that replacement interphase barrier has been installed in correct accessory cavity side, and that cradle reset pin has not fallen out of retaining slot in handle arm.
2-10. Put molded handle on handle arm, and install retaining screw. (See Fig 2-3.)
CAUTION
PIGTAIL WIRES SHOULD BE FORMED AND ROUTED TO
CLEAR ALL MOVING PARTS WHEN ACCESSORY IS
PROPERLY INSTALLED. PIGTAIL LEADS COULD BE
DAMAGED IF IN CONTACT WITH MOVING PARTS.
2-11. Route wiring to meet installation requirements (Fig. 2-5).
If required, complete routing of leads to opposite side through rear wiring trough.
WARNING
WHEN CHECKING ACCESSORY, DO NOT PUT FINGERS
NEAR MOVING PARTS INSIDE CIRCUIT BREAKER CASE.
SPRINGS CAUSE INTERNAL PARTS TO MOVE QUICKLY
AND WITH FORCE. CONTACT WITH MOVING PARTS CAN
CAUSE INJURY.
Fig. 2-4. Testing Operation os Solenoid Plunger c. Reset circuit breaker handle and check that handle
arm moves the reset lever, and that solenoid
plunger is pushed into solenoid and held by
magnet.
d. If mechanical checks do not work, make sure LEST
and intermediate plunger are correctly installed. If
LEST and intermediate plunger appear to be
correctly installed and problem persists, contact
Eaton.
CAUTION
WHEN INSTALLING CIRCUIT BREAKER COVER, MAKE
SURE THAT ALL INTERNAL PARTS ARE IN PLACE:
• SLIDING HANDLE BARRIE RS ARE INSTALLED SO
THAT HANDLE OPENING IS ALIGNED WITH THE
HANDLE.
• PIG TAIL LEADS ARE CLEAR OF COVER.
WHEN REMOVED AND REINSTALLED,
THREAD-FORMING SCREWS TRY TO REFORM THE
THREADS IN CIRCUIT BREAKER BASE. CARE SHOULD
BE TAKEN EVERY TIME A THREAD-FORMING SCREW IS
USED TO ENSURE THAT THE SCREW STARTS IN THE
ORIGINAL THREADS. DAMAGED THREADS CAN
RESULT IN IMPROPER CIRCUIT BREAKER COVER
RETENTION.
Fig. 2-5. Accessory Wiring Options
EATON CORPORATION www.eaton.com
4
Instruction Leaflet IL 29C145C
Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD, HKD,
KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and
and Motor Circuit Protectors (MCP)
2-13. With circuit breaker handle in TRIPPED position and accessory
pigtail leads (if used) routed as required, install circuit breaker
cover. Secure with pan-head screws, followed by
thread-forming screws as shown in Fig. 2-7.
1 3P
2 4P
2
3P
4P
1
2
2
CAUTION
IF LEST IS REMOVED FROM CIRCUIT BREAKER,
INTERMEDIATE PLUNGER MUST ALSO BE REMOVED.
FAILURE TO REMOVE INTERMEDIATE PLUNGER CAN
RESULT IN EQUIPMENT DAMAGE.
1
1
2
3P
4P 2
1
3
3P 1
1
2
Screw, No. 8x 1.63 Inch, Flat Head, Cross-Recessed,
Thread Forming.
Screw .190-32 x 3.125 Inch Pan Head, Cross-Recessed.
Note: Hatched lines show additional pole and screw for
4-pole circuit breaker.
Fig. 2-7. Cover Screw Installation Position
2-14. Remove and discard UL listing label on DK and KDB
circuit breakers only.
2-15. Place accessory labels (supplied with kit) on circuit
breaker. (See Fig. 2-8.)
CAUTION
SOLENOID IS RATED FOR INTERMITTENT DUTY.
CONTINUOUS APPLICATION OF 24 VDC WILL DAMAGE THE
SOLENOID.
2-16. Electrical check. Where practical and after taking all
necessary safety precautions, connect yellow LEST lead to
positive terminal of a DC power supply and white lead to
breaker trips when 24 Vdc (maximum pulse of one second) is
applied to leads.
2-17. Install circuit breaker.
Note: Accessory labels show connection diagram for LEST contacts. Pigtail leads are color coded yellow and white.
2-18. Connect LEST to ground fault detection circuit to be
monitored. (See Fig. 2-9.) Yellow lead is positive.
Eaton assumes no responsibility for malfunctioning accessories installed by the customer.
Fig. 2-8. Prefered Mounting Locations for Accessory
Nameplate Labels
Fig. 2-9. Low Energy Shunt trip Connection Diagram
5 EATON CORPORATION www.eaton.com
Instruction Leaflet IL 29C145C
The instructions for installation, testing, maintenance, or repair herein are provided for the use of the product in general commercial applications and may not be appropriate for use in nuclear applications. Additional instructions may be available upon specific request to replace, amend, or supplement these instructions to qualify them for use with the product in safety-related applications in a nuclear facility.
The information, recommendations,descriptions,and safety notations in this document are based on Eaton’s experience and judgment with respect to Retrofitting of Power Breakers. This instructional literature is published solely for information purposes and should not be considered all-inclusive. If further information is required, you should consult an authorized Eaton sales representative.
The sale of the product shown in this literature is subject to the terms and conditions outlined in appropriate Eaton selling policies or other contractual agreement between the parties. This literature is not intended to and does not enlarge or add to any such contract.
The sole source governing the rights and remedies of any purchaser of this equipment is the contract between the purchaser and Eaton.
NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR
MERCHANTABILITY, OR WARRANTIES ARISING FROM COURSE
OF DEALING OR USAGE OF TRADE, ARE MADE REGARDING
THE INFORMATION, RECOMMENDATIONS, AND DESCRIPTIONS
CONTAINED HEREIN,
In no event will Eaton be responsible to the purchaser or user in contract, in tort (including negligence), strict liability or otherwise for any special, indirect, incidental or consequential damage or loss whatsoever,including but not limited to damage or loss of use of equipment, plant or power system, cost of capital, loss of power, additional expenses in the use of existing power facilities, or claims against the purchaser or user by its customers resulting from the use of the information, recommendations and description contained herein.
Installation Instructions for Low Energy Shunt Trip for DK, KDB, KD, HKD,
KDC, KW, HKW, KWC, Circuit Breakers, Molded Case Switches, and
and Motor Circuit Protectors (MCP)
Eaton Corporation
Electrical Group
1000 Cherrington Parkway
Moon Township, PA 15108
United State
877-ETN-CARE (877-386-2273)
Eaton.com
© 2014 Eaton Corporation
All Rights Reserved
Printed in Dominican Republic
Publication No. IL 29C145C
Part No. 6632C63H04
April 2015
