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New generation IZM97, 99 low voltage air circuit breaker instruction manual
MN013010EN February 2020 www.eaton.com.cn
Section 4: Accessory devices
Screw
Removable
plastic sheet
Front cover
If square nut is not inside slot,
Refer to Note 2 in Step 3
Main shaft end machined – refer to
Note 1 in Step 3
M6 screw (G)
Tripper bar
Main shaft
Drive arm (E)
M6 nut (A)
Compression
spring (F)
Second wave
washer (I)
First wave washer (I)
Square nut (J)
Interlocking
shaft
Third wave washer (I)
(A)
(B)
(C)
(F)
(G)
(H)
(I)
(J)
(E)
(D)
Figure 1. Content of assemblies
Figure 2. Step 1
Figure 3. Step 2
Figure 4. Step 3
Figure 5. Step 4
Section 2: Installation of 2-way cable interlock
Proceed with the following 7 steps:
Step1: Remove the hexagonal bolts (four for 3 pole breakers
and six for 4 pole breakers) from the front cover connected
to the circuit breaker using a 10 mm 1/4-inch socket wrench.
Then pull down on the charging handle by about 45° angle to
remove the front cover.
Step 2: Remove the U-shaped plastic sheet on the right side
of the front cover using a vice, and carefully remove the
burrs on the section.
Step 3: Install the drive arm (E) downwards on the right end
of the shaft as shown. Use M6x25 flat head screws (G) for
connection. Torque to 65-85 lb-ft (7.3-9.6 Nm).
Note:
1. If the major shaft end has not been machined as shown,
contact Eaton for instructions.
2. 2. If the M6 nut is not in the slot as shown, move the
bolt on the top of the bracket and loosen the 2 bolts on
the bottom by 7 turns, and retain the tripper bar in the
position as shown. Slide out of the top of the circuit
breaker bracket and insert the square nut (J) into the
slot, facing outward, and tighten the three bolts.
Step 4: Install the drive lever assembly first. Install a square
nut (J) and wave washer (I) on the threaded rod (H), insert
it into the interlocking shaft. Then install a wave washer and
compression spring (F). Tighten it with a M6 nut (A).