Effective August 2022
Instructional Leaet IL0131177EN
IZM63 low voltage drawout circuit
breaker horizontal stab cassette shutter kit
m 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.
m WARNING
THE INSTRUCTIONS CONTAINED IN THIS IL AND ON
PRODUCT LABELS MUST BE FOLLOWED. OBSERVE
THE FIVE SAFETY RULES.
• DISCONNECTING;
• ENSURE THAT DEVICES CANNOT BE ACCIDENTALLY
RESTARTED;
• VERIFY ISOLATION FROM THE SUPPLY;
• EARTHING AND SHORT-CIRCUITING; AND;
• 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 optional automatically
operated insulating type safety shutters for use
with a drawout cassette. When the drawout circuit
breaker is levered (racked) from the CONNECT
position, the shutters automatically close to cover
the fixed primary contacts. When the circuit
breaker is levered (racked) into the cassette, the
shutters automatically open, permitting primary
connections to be made.
Required tools
•10 mm socket and drive (M6 hex nut)
•10 mm wrench (M6 x 30 screw)
•External retaining-ring tool E-clip (retaining ring)
•Small Phillips head screwdriver
(M4 x 10 screw)
•Slotted screwdriver (link mounting screw)
•Small crescent wrench (M4 nut)
Kit parts identification
Refer to Figure 2 for visual identification of the
parts listed below:
(A) M6 hex nut (four)
(B) M6 x 30 screw (eight for six-pole,
ten for eight-pole)
(C) M6 lock washer (four)
(D) Shutter spring (two)
(E) Upper shaft assembly (two)
(F) Lower shaft assembly (two)
(G) Top link slide assembly (one)
(H) Bottom link slide assembly (one)
(I) M4 nut with lock washer (four)
(J) Link mounting screw (four)
(K) O-ring (four)
(L) M4 x 10 screw (four)
(M) M6 x 25 wide washer (four)
(N) Retaining ring (four)
(O) Shaft collar (four)
(P) Lubricant (one)
(Q) Shutter panel assembly (two)
(R) Bottom bearing—double wide shaft (one)
(S) Shaft joint (two)
(T) M8 x 8 hex bolt (four)
(U) M8 serrated lock washer (four)
(V) Top bearing—double wide shaft (one)
(W) M6 serrated lock washer (three)
(X) M6 x 12 thread-forming screw (three)
(Y) Barrier panel (one)
2
IZM63 low voltage drawout circuit
breaker horizontal stab cassette shutter kit
EATON www.eaton.com
Instructional Leaflet IL0131177EN
Effective August 2022
Figure 1. External Retaining-Ring Tools
Figure 2. Contents of Kit
Figure 3. Additional View of the Cassette Side Sheet
(Y) (A) (C)
(B)
(X)
(W)
(V) (T)
(U)
(R)
(S) (D)
(F)
(E)
(J)
(I) (K)
(M)
(L) (N)
(O)
(H)
(G)
(Q)
(P)
Section 2: Installation of IZM63 cassette
shutter kit
Proceed with the following eight steps:
Step 1: Install two shaft collars on left-side sheet (on right-side sheet
for right-side mounting). Fasten the grooves on the collars with
retaining rings.
Figure 4. Step 1
Step 2: Apply Magnalube-G lubricant (provided with kit) to wide
washer face and edges of slots. Run link mounting pins through slots
and washers, and capture with retaining rings. Hook shutter spring
on the mounting post of bottom link slide assembly.
Figure 5. Step 2
Shaft Collar
Retaining Ring
Bottom Shutter Link Assembly Shown
(for left side mounting)
Washer
Washer
Lubricant
Here
Mounting
Post
O-Ring
O-Ring
Shutter Spring
Link Mounting
Pin
3
Instructional Leaflet IL0131177EN
Effective August 2022
IZM63 low voltage drawout circuit
breaker horizontal stab cassette shutter kit
EATON www.eaton.com
Step 3: Mount the shutter slide link assemblies to the cassette side
sheet with M6 lock washers (C) and M6 hex nuts (A). The left-side
mounting is shown with the right-side mounting just the opposite.
ote: NThe straight edge (without step) of the slide link assembly is on the
bottom of the lower assembly and is up on the upper assembly.
Figure 6. Step 3
Step 4: Assemble the shutter shafts to the joiner brackets with
M8 x 8 mm hex bolts and serrated lock washers. Note the location
of the slotted shaft arms.
Figure 7. Step 4
Hook spring
here
M6 nut and
serrated
washer
Notch
down
Slotted
shaft arm
M8 hex bolt
and serrated
washer Joiner
bracket
M8 hex bolt
and serrated
washer
Step 5: Mount each shutter assembly with two M4 screws and
hex nuts, and four M6 x 30 thread-forming screws (six required for
four-pole shutters). Torque the M6 x 30 thread-forming screws to
64–80 in-lbs (7–9 Nm).
Mount the bearing plate to the rail with two M6 x 12 mm
thread-forming screws. Torque to 64–80 in-lbs (7–9 Nm).
Figure 8. Step 5
Step 6: Apply Magnalube (P) lubricant to the edges of slots on the
shaft arms of the shaft assemblies and to the inside surfaces of
the shaft collars.
Figure 9. Step 6
Bearing
plate
M4 x 10 screw hex nut
with lock washer
M6 x 12 thread-
forming screw
M6 x 30 thread-
forming screw
Lubricate edges
of slots and
curved edges
Lubricate four
shaft collars (O)
Eaton is a registered trademark.
All other trademarks are property of their
respective owners.
IZM63 low voltage drawout circuit
breaker horizontal stab cassette shutter kit
Eaton Industries GmbH
Hein-Moeller-Straße 7-11,
53115 Bonn,
Germany
Eaton.com
© 2022 Eaton Industries GmbH
All Rights Reserved
Printed in Germany
Publication No. IL0131177ENH01
Effective August 2022
Instructional Leaflet IL0131177EN
Effective August 2022
Step 7: Refer to Figure 13 for an exploded view of the shaft assemblies.
1. Position the tips of the shaft arms between the pins on the shut-
ters. Maintain this position during the assembly.
2. Extend the other end of shaft through holes on other side sheets
(without shaft collars). Then position slot on the shaft arm over
the pin on the shutter link.
3. Insert the shaft end into the shaft collar, and into center-bearing
plates (refer to Steps 7a and 7b). Check the positions of the shaft
arms between the shutter pins, and the slot on shaft arm over
shutter link pin.
Figure 10. Step 7
Figure 11. Step 7a
(1) Position tips of shaft
arms and maintain
(2) Position slot
on shaft arm
(3) Insert shaft end
and check position
Bearing plate for
lower shaft
Figure 12. Step 7b
Step 8: To install the shutter shaft assemblies, insert the two
remaining shaft collars through the other side sheet and onto the
other ends of the shafts. Fasten grooves on these collars with
retaining rings.
Figure 13. Step 8
Bearing plate
for upper shaft
Left side mounting shown for both upper and lower shaft
assemblies (shafts are reversed for right side mounting)
Shaft
collar
Shaft
collar
Retaining ring
attaches inside
cassette
Upper shaft
Lower shaft
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.
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