EATON IL01301021E Air Circuit BREAKER Instruction Manual
- June 3, 2024
- EATON
Table of Contents
Instruction Leaflet IL01301021E
Effective September 2015
Supersedes February 2011
IL01301021E Air Circuit BREAKER
Installation and removal instructions for Series NRX drawout cassette and fixed breaker interphase barriers
WARNING
- ONLY QUALIFIED ELECTRICAL PERSONNEL SHOULD BE PERMITTED TO WORK ON THE EQUIPMENT.
- ALWAYS DE-ENERGIZE PRIMARY AND SECONDARY CIRCUITS IF A CIRCUIT BREAKER CANNOT BE REMOVED TO A SAFE WORK LOCATION.
- DRAWOUT CIRCUIT BREAKERS SHOULD BE LEVERED (RACKED) OUT TO THE DISCONNECT POSITION
- 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.
WARNING
THE INSTRUCTIONS CONTAINED IN THIS IL AND ON PRODUCT LABELS HAVE TO BE
FOLLOWED. OBSERVE THE FIVE SAFETY RULES:
- DISCONNECTING
- ENSURE THAT DEVICES CANNOT BE ACCIDENTALLY RESTARTED
- VERIFY ISOLATION FROM THE SUPPLY
- EARTHING AND SHORT-CIRCUITING
- COVERING OR PROVIDING BARRIERS TO ADJACENT LIVE PARTS
DISCONNECT THE EQUIPMENT FROM THE SUPPLY.
USE ONLY AUTHORIZED SPARE PARTS IN THE REPAIR OF THE EQUIPMENT. THE SPECIFIED MAINTENANCE INTERVALS AS WELL AS THE INSTRUCTIONS FOR REPAIR AND EXCHANGE MUST BE STRICTLY ADHERED TO PREVENT INJURY TO PERSONNEL AND DAMAGE TO THE SWITCHBOARD.
General information
IMPORTANT
IT IS RECOMMENDED THAT APPROPRIATE INTERPHASE BARRIERS BE INSTALLED BETWEEN
INSIDE AND OUTSIDE PRIMARY TERMINALS WITH ALL REAR-CONNECTED CONFIGURATIONS ON
DRAWOUT CASSETTES AND FIXED TYPE CIRCUIT BREAKERS TO ENSURE INSULATION
INTEGRITY. THESE INSTRUCTIONS ARE PROVIDED FOR EATON SUPPLIED INTERPHASE
BARRIERS OR INTERPHASE BARRIERS PURCHASED SEPARATELY FROM EATON.
Eaton supplied interphase barriers are made from a flexible rubber type
material, and when installed, provide the proper insulation integrity. Drawout
cassettes and fixed circuit breakers are designed for the simple installation
of these barriers.
Drawout cassette barriers
Dove tail shaped mounting slots are provided in the primary backpan of the
cassette for mounting Eaton supplied interphase barriers (Figure 1). 
Proceed with the following four steps:
Steps 1 and 2
To install both supplied rubber type interphase barriers, slide each barrier
in until the dove tail shaped keys on the barrier firmly engage the two
mounting slots at the top and bottom of the cassette’s backpan. Three barriers
would be required for a four-pole breaker. Refer to Figure 1 for an additional
reference.
Installation and removal instructions for Series NRX
drawout cassette and fi xed breaker interphase barriers 
Step 3
Once the barriers are installed, they will feel securely mounted to the touch
and appear as shown.
Step 4
Reverse the procedure to remove the barriers from the cassette.
Fixed breaker barriers
Rear connect primary covers on the rear of the fixed breaker have two sets of
molded friction fit guides to secure the barriers in place. There are two
guides near the top and two near the bottom that are used for mounting Eaton
supplied interphase barriers (Figure 5). 
Proceed with the following four steps.
Steps 1 and 2
To install both supplied rubber type interphase barriers, slide each barrier
down between the top and bottom sets of molded guides. The molded guides will
hold the barriers securely in place at the top and bottom. Three barriers
would be required for a four-pole breaker.
Step 3
Once the barriers are installed, they will feel securely mounted to the touch
and appear as shown.
Step 4
Reverse the procedure to remove the barriers from the fixed breaker.
Interphase barrier kits
| Description | Catalog number |
|---|---|
| Three-pole cassette kit | 3DBAR |
| Four-pole cassette kit | 4DBAR |
| Three-pole fixed mount kit (rear connect) | 3RBAR |
| Four-pole fixed mount kit (rear connect) | 4RBAR |
Disclaimer of warranties and limitation of liability.
The information, recommendations, descriptions, and safety notations in this
document are based on Eaton’s 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.
Eaton
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Cleveland, OH 44122
United States Eaton.com
© 2015 Eaton
All Rights Reserved Printed in USA
Publication No. IL01301021E / Z17288
Part Number IL01301021E-H05 September 2015
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