Instructional Leaflet
IL2C14762H06
Effective August 2011
Supersedes January 2010
Shunt trip in Magnum low voltage circuit breakers
warning
(1) Only qualified electrical persOnnel shOuld be permitted tO wOrk On the equipment.
(2) always de-energize primary and secOndary circuits if a circuit breaker cannOt be remOved tO a safe wOrk lOcatiOn.
(3) drawOut circuit breakers shOuld be levered (racked) Out tO the discOnnect pOsitiOn.
(4) all circuit breakers shOuld be switched tO the Off pOsitiOn and mechanism springs discharged. failure tO fOllOw these steps fOr all prOcedures described in this instructiOn leaflet cOuld result in death, bOdily injury,
Or prOperty damage.
Figure 1. Steps 1 and 2
Label
Bolt
Section 1: General information
The shunt trip opens the circuit breaker when its coil is energized by a voltage input. When replacing a shunt trip, both the shunt trip and the cut-off switch must be replaced.
Section 2: Installation of the shunt trip
To install the shunt trip, proceed with the following eight steps:
Step 1: Remove the front cover by unscrewing the hex-head captive bolts (four for three-pole, six for four-pole) that join the cover to the breaker housing using a 10 mm 1/4-inch drive socket. Then hold the charge handle down approximately 45 degrees to pull off the cover.
Step 2: Place the appropriate label on the front cover nameplate space located under
“Accessories.”
Step 3: Each shunt trip comes with a cut-off switch. Mount the switch by sliding the lock to the unlocked (up) position. Install the hook feet down through openings as shown. Then slide the assembly forward so the hook feet engage the mounting plate. Slide the lock down into the locked position.
N Nte: The cut-Nff switch is nNt applicable fNr the cNntinuNus duty shunt trip.
Shunt Trip
Cut-Off Switch
Forward
Mounting
Plate
Figure 2. Step 3
Lock
Hook Feet
Step 4: Slide the lock on the shunt trip to the unlocked (up) position, and install the hook feet down through the opening. Then slide it forward until the feet engage the mounting plate. Slide the lock back down to lock the shunt trip in place.
Instructional Leaflet
Effective August 2011
IL2C14762H06
Shunt Trip
Shunt trip in Magnum low voltage circuit breakers
Step 7: If a second shunt trip is to be installed, repeat Steps 3, 4, and 5. Wire to the secondary contact block “A,” positions 7 and 8.
Forward
Lock
First Shunt Trip
Cut-Off Switch
Here
Hook Feet
Mounting Plate
Mount First
Shunt Trip Here
Install
Second Shunt
Trip Cut-Off
Switch Here
First
Shunt Trip
Mounting
Plate
Install Second
Shunt Trip
Here
Figure 6. Step 7
Figure 3. Step 4
Step 5: Mate the shunt trip connector with the cut-off switch connector.
Shunt Trip
Figure 4. Step 5
B11 B10
Shunt Trip
Cut-Off
Switch
Step 6: Wire to the secondary contact block “B,” positions 10 and 11 in keeping with the wire markings.
Secondary
Block “A”
Mated Connector
Mounting
Plate
Secondary
Block “B”
Step 8: Reinstall front cover removed in Step 1.
Disclaimer of warranties and limitation of liability
The information, recommendations, descriptions, and safety notations in this document are based on Eaton Corporation’s
(“Eaton”) experience and judgment, and may not cover all contingencies. If further information is required, an Eaton sales office should be consulted.
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 Eaton and the purchaser.
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, WARRANTIES,
EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF FITNESS
FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OTHER
THAN THOSE SPECIFICALLY SET OUT IN ANY EXISTING
CONTRACT BETWEEN THE PARTIES. ANY SUCH CONTRACT
STATES THE ENTIRE OBLIGATION OF EATON. THE CONTENTS OF
THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY
ANY CONTRACT BETWEEN THE PARTIES.
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 descriptions contained herein.
The information contained in this manual is subject to change without notice.
Mounting
Plate
Figure 5. Step 6
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United States
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Publication No. IL2C14762H06 / Z11444
August 2011
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