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Instruction Leaflet 

IL2C13761H11

Effective March 2020

Installation instructions for Kirk

Key Interlock Kit (2C12891G21) in

Magnum low-voltage circuit breakers

EATON

 www.eaton.com

Disclaimer of warranties and  

limitation of liability

The information, recommendations, descriptions, and safety 

notations in this document are based on Eaton’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.

Summary of Contents for 2C12891G21

Page 1: ...FOLLOW THESE STEPS FOR ALL PROCEDURES DESCRIBED IN THIS INSTRUCTION LEAFLET COULD RESULT IN DEATH BODILY INJURY OR PROPERTY DAMAGE WARNING THE INSTRUCTIONS CONTAINED IN THIS IL AND ON PRODUCT LABELS H...

Page 2: ...cket drive 10 mm socket 2 Phillips head screwdriver 1 7 16 inch 36 mm hole saw 3 32 hex key 9 64 hex key Needle nose pliers Arbor press bench vise or equivalent a Spring puller such as Moody Tool item...

Page 3: ...ck and then mount to lock mounting plate C with the knurled nut IMPORTANT DO NOT INSERT KEY Key lock A Bushing B Knurled nut Kirk lock mounting plate C Figure 3 Step 2 Step 3 Put torsion spring D on g...

Page 4: ...er is OPEN and discharged Using the 10 mm socket and 1 4 inch driver remove the front cover of the breaker by loosening four mounting bolts six bolts if four pole breaker and holding the charging hand...

Page 5: ...lled lock assembly Machine screws M Figure 11 Step 11 IMPORTANT FAILURE TO INSTALL EXTENSION SPRING AS SHOWN WILL CAUSE MALFUNCTION OF THIS KIT Step 12 Connect extension spring N between the interlock...

Page 6: ...accept tapping screw Q replace it by prying off existing e clip and sliding off the trip lever Install new trip lever O and install e clip P Trip lever O E clip P Tapping screw Q Figure 16 Steps 13 an...

Page 7: ...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 ENTI...

Page 8: ...ed in USA Publication No IL2C13761H11 Z23948 March 2020 Eaton is a registered trademark All other trademarks are property of their respective owners Installation instructions for Kirk Key Interlock Ki...

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