EATON IL01301011E NRX Series IZMX,IZM91 Operation Counter Installation Guide
- October 26, 2023
- EATON
Table of Contents
EATON IL01301011E NRX Series IZMX,IZM91 Operation Counter Installation
Guide
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.
- DRAW OUT 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.
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WARNING
HE 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
Section 1:
The optional operation counter is a mechanical device used to provide a record of the number of circuit operations. It can be viewed through the breaker’s front cover (Figure 1).
An operation counter kit is comprised of the counter assembly and a mounting screw. The counter assembly consists of the following:
-
Counter with mounting screw
(M3 x 0.5–5 mm long) (Figure 2) -
Counter lever, screw (M2 x 0.4–8 mm long) and hex nut
(M2 x 0.4) (Figure 3)
Figure 1. Installed Operation Counter Shown
Figure 2. Counter with Mounting Screw
Figure 3. Counter Lever Mounted with Screw and Hex Nut
Installation of operation counter
Section 2:
Step 1: Remove the four screws holding the front cover in place (two on
each side of the cover).
Figure 4. Step 1
Step 2: Remove the front cover. Pull down on the charging handle to
simplify removal.
Figure 5. Step 2
Step 3: If the counter lever is already loosely installed on the counter
shaft as shown in Figure 3, skip Step 3 and go to Step 4. If the counter lever
is not loosely installed on the counter shaft, proceed with Step 3. Loosely
install the counter lever on the counter’s shaft (Figure 2) using the provided
M2 x 0.4 screw and nut. The screw should not be torqued tight at this point to
permit movement of the counter lever on the shaft.
Figure 6. Step 3
Step 4: Make certain that mechanism springs are discharged and the
breaker is open before proceeding. Install the counter assembly, which
includes the counter and the loosely mounted counter lever, onto the top of
the counter bracket using the single M3 x 0.5 mounting screw. The counter
bracket is located on the breaker front and has a threaded hole for the
mounting screw. Torque the mounting screw to 44 in-oz (0.31 Nm).
Figure 7. Step 4
Step 5: With the counter assembly installed and properly torqued, apply
some magna-lube type grease to the counter lever and rocker arm contact
surfaces. The rocker arm is located on the right side below the counter
bracket.
Figure 8. Step 5
CAUTION
THE COUNTER LEVER THAT IS POSITIONED AND TORQUED TIGHT IN THE NEXT TWO STEPS SHOULD NEVER BE INSTALLED UP AGAINST THE COUNTER CASE OR THE MECHANISM SIDE SHEET TO AVOID ANY UNNECESSARY FRICTION WITH THE COUNTER CASE OR THE SIDE SHEET. THE COUNTER LEVER SHOULD BE LOCATED TOWARD THE END OF THE COUNTER SHAFT. FAILURE TO FOLLOW THIS CAUTION AND MAINTAIN SPACE BETWEEN THE COUNTER LEVER AND THE COUNTER CASE, OR THE COUNTER LEVER AND THE MECHANISM SIDE SHEET COULD RESULT IN IMPROPER OPERATION OF THE COUNTER AND/OR COUNTER DAMAGE.
Step 6: Rotate the loosely mounted counter lever in a counterclockwise
direction until it is in solid contact with the rocker arm. Maintain this
contact and proceed to Step 7.
Figure 9. Step 6
Step 7: With the counter lever in solid contact with the rocker arm, torque the counter lever screw to 26 in-oz (0.18 Nm). The force naturally applied to the counter lever by the screwdriver during the torquing process will keep the counter lever in contact with the rocker arm. Ensure that space between the counter lever and counter case or mechanism side sheet is maintained.
Figure 10. Step 7
Step 8: Manually advance the counter numeric display until it reads zero.
Step 9: With the counter assembly now installed, place the front cover
previously removed in Step 2 on an appropriate work surface front side up. Put
a rigid support under the knockout window. Using a punch and small hammer,
carefully punch out a rectangular viewing window in the lower center portion
of the front cover. If necessary, use a small file to remove any burrs from
the window. Make certain that all pieces and/or particles are cleaned up and
removed before proceeding to Step 10.
Figure 11. Step 9
Step 10: Replace the front cover and secure it in place with the mounting
screws previously removed in Step 1. When replacing the front cover, ensure
that the knockout hole in the cover is aligned with the operation counter
front.
Figure 12. Step 10
Step 11: Test the counter with the front cover in place. If it is a draw out breaker, lever (rack) it to the TEST position.
Removal of operation counter
Section 3:
To remove the operation counter, perform Steps 1 and 2 of Section 2 to remove the front cover of the breaker. Complete the removal process by reversing the process as described in Steps 4 through 7 of Section 2.
Operation counter maintenance/ adjustment
Section 4:
During the life of the product, the operation counter should not need to be adjusted. It is, however, a good and recommended practice to perform counter maintenance and adjustment during general maintenance intervals.
WARNING
BEFORE PERFORMING ANY MAINTENANCE/ADJUSTMENT ACTIVITIES, DRAWOUT BREAKERS SHOULD BE LEVERED (RACKED) OUT TO THE DISCONNECT POSITION. DE-ENERGIZE PRIMARY AND SECONDARY CIRCUITS IF A CIRCUIT BREAKER CANNOT BE REMOVED TO A SAFE WORK LOCATION. ALL CIRCUIT BREAKERS SHOULD BE SWITCHED TO THE OFF POSITION AND MECHANISM SPRINGS DISCHARGED. FAILURE TO FOLLOW THIS WARNING COULD RESULT IN DEATH, BODILY INJURY, OR PROPERTY DAMAGE.
Perform maintenance/adjustment activities by following these seven steps
Step 1: Remove the front cover of the circuit breaker as previously
described in Steps 1 and 2 of Section 2.
Step 2: Loosen the counter lever screw by one turn. Refer to the Step 3
graphic of Section 2 (Figure 6).
Step 3: Loosen the counter mounting screw by one turn.
Refer to the Step 4 graphic of Section 2 (Figure 7).
Apply some fresh magna-lube type grease to the counter lever and rocket arm
surfaces. Refer to the Step 5 graphic of Section 2 (Figure 8).
Step 4: Slightly lift the counter from the front and re-torque the
counter lever screw first to 26 in-oz (0.18 Nm). Refer to Step 7 of Section 2.
Step 5: Re-torque the counter mounting screw second to 44 in-oz (0.31
Nm).
Refer to Step 4 of Section 2.
Step 6: Replace the front cover, and secure it in place with the mounting
screws previously removed in Step 1. When replacing the front cover, ensure
that the knockout hole in the cover is aligned with the operation counter
front.
Step 7: Test the counter with the front cover in place. If it is a
drawout breaker, lever (rack) it to the TEST position.
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
MERCHANT ABILITY, 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.
Support
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Moon Township, PA 15108
United States
877-ETN-CARE (877-386-2273)
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All Rights Reserved
Printed in USA
Publication No. IL01301011E
September 2010
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