EATON IL01301013E Air Circuit Breaker Instruction Manual
- June 6, 2024
- EATON
Table of Contents
Instructional Leaflet IL01301013E
Installation/removal instructions
for Series, NRX draw out cassette
primary IP20 safety shutters
Instructions apply to:
Type NF Frame Series NRX
ANSI, UL1066, UL489/IEC IZMX16, IZM91
WARNING
1600 NRX SUB-TITLE IMAGE (12/15/2010)
(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 CAN
NOT 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.
WARNING
THE INSTRUCTIONS CONTAINED IN THIS IL AND ON PRODUCT LABELS HAVE TO BE
FOLLOWED. OBSERVE THE FIVE SAFETY RULES:
– DISCONNECTING
– ENSURE THAT DEVICES CAN NOT 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.
Section 1: General information
Cassette safety shutters are insulating-type shutters tested for IP20 protection. They operate automatically to cover a cassette’s fixed primary contacts when the breaker is not in the CONNECT position ( Figure 1 ). Provisions are provided for padlocking the shutters in the CLOSED position.
Figure 1. Drawout Cassette (Front View Closeup, Shutters Open)
A complete draw-out cassette shutter installation is comprised of two
duplicate, already assembled, shutter assemblies (Figure 2). Become
familiar with the shutter assemblies provided.
Figure 2. Shutter Assemblies
The two interchangeable shutter assemblies are installed in the rear backplane
(Figure 3). The backplane without its fixed primary contacts installed is
shown here removed from its cassette for clarification purposes only. Become
familiar with the cassette’s rear backplane.
Figure 3. Rear Backplane Only
Section 2: Installation of cassette safety shutter
This installation procedure will cover a three-pole installation.
A four-pole installation is done in a similar fashion. Proceed with the
following two steps for a three-pole installation:
Step 1: Installation of the individual shutter assemblies is in an OPEN position. To open an individual shutter assembly, place it flat down on a solid surface with the padlock hole facing away from you. Push down simultaneously and to the left on two small retainer tabs with two thumbs. Once the two tabs disengage from the rear of the shutter panel, the panel can be pushed down into the OPEN position. This OPEN position should be maintained until the assembly is installed in the backplane.
Figure 4. Step 1
Step 2: Note two mounting tabs located on the shutter assembly opposite
the padlock hole and the shutter retainers on the opposite side (Figure 2). It
doesn’t matter which shutter assembly is installed first, as long as the
padlock hole is positioned toward the center of the backplane.
Insert either shutter assembly held in the OPEN position from Step 1 at an
angle as shown so the mounting tab engages a small pocket in the backplane.
Complete the installation by pushing down on the other end of the shutter
assembly until the shutter retainer tabs engage the backplane center divider,
which is indicated by a click (Figure 3). Once both ends of a shutter
assembly are engaged, test for a secure installation by gently tugging on the
shutter assembly to ensure the proper engagement.
An installed shutter assembly will automatically return to the CLOSED position
once it is not being held open.
Section 3: Removal of cassette safety shutter
Proceed with the following step for the removal of a shutter assembly.
Step 1: To remove a shutter assembly that is snapped into place in the
rear backplane, the shutter assembly should be in the OPEN position. Push to
release the two retainer tabs as described in Step 1 of Section 2 on page 2
and push down on the shutter panel to open it. Once the shutter is open, push
the tabs in the center divider of the backplane back with a small screwdriver
to release the two shutter retainer tabs. The shutter assembly can be lifted
up and out, once both tabs are released.
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.
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
agreements 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 Corporation
Electrical Group
1000 Cherrington Parkway
Moon Township, PA 15108
United States
877-ETN-CARE (877-386-2273)
Eaton.com
© 2010 Eaton Corporation
All Rights Reserved
Printed in the USA
Publication No. IL01301013E
December 2010
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