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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
Install
compression
spring under
Rod A swivel
ring
Interlock assembly
connection method
Install the
compression
spring above
Rod C swivel
ring
A
B
C
D
1
2
3
Spacer nut
Swivel ring
Sleeve
Drive end (long)
Rubber boot
Cable rod
Thread portion
Cable housing
Figure 8. Step 8
state in Figure 7). Close the circuit breaker, and rotate the drive
rod by approximately 60 degrees counterclockwise. The clearance
between the drive rod lower left corner and support bracket edge is
1-4mm (refer to the circuit breaker in CLOSED state in Figure 7). If
any clearance is not in compliance, stop installation. Please consult
Eaton for more assistance.
Step 8: This step describes cable routing. Make sure that all cables
move freely in their cable housings before installation. During cable
routing among frames, make sure that the cable housings have no
sharp bends and the total number of bends is minimized. The mini-
mum cable bend radius is 102mm.
After installing and adjusting the cable, it is necessary to attach
cable housings to a proper number of bends along the cable. Use
plastic clamps and harnesses to minimize cable entanglement.
Check again to ensure cables move freely after installed. Detailed
installation methods are described in Table 1 and Figure 8.
Table 1. Cable routing connection indication
Six groups of connection cables
Outgoing end
Incoming end
1A
1C
3D
2B
2A
2C
1D
3B
3A
3C
2D
1B
Step 9: This step describes how to attach a cable to the interlock
mechanism. The drive long rod is shown below. Unscrew the nut
and spacer sleeve from the end of the long rod. Slide the rubber
boot towards the tip of the long rod. Unthread the spacer nut and
slide the nut and self-locking washer together towards the bottom.
Insert the threaded end of the long rod into the swivel ring, and
slide the smaller diameter portion of the long rod into the support
panel slot. Raise the cable assembly until the threaded portion of
the drive rod enters the slotted hole, then lock the spacer washer
and nuts. Adjust the two spacer nuts to have the long rod approxi-
mately centered on the cable support bracket and hand tighten the
screw. Slide the rubber boot back into place over the end of the
drive long rod. Place the sleeve and upper nut on top of the long
rod. The lower nut should be shouldered against the end of thread
and upper nut tightened against the sleeve. Torque to 3.3-4.5Nm
for lower nut. Repeat the above steps to install other cable ends on
the interlocking mechanism of other circuit breakers. The only dif-
ference is that a compression spring is placed between the swivel
ring and external nut for the drive rod (short version). Remove the
spring before installation and replace it when installing the rod top
nut. Re-check whether the cables can move freely after installation.
Figure 9. Step 9
