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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
IZM9 circuit breaker 3-way interlock
WARNING
(1) Only qualified electrical personnel should be permit-
ted 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.
Section 1: General information
The mechanism linkage device can be used to interlock two
to three IZM circuit breakers. Mechanism interlocking holds
one or more circuit breakers tripped (prevents closure). An
operating lever assembly is installed on each circuit breaker
and interfaces with the main shaft and the tripper bar. The
lever assemblies are interconnected with cables. Cables can
be used for any orientation of the circuit breaker.
Required tools
• 10mm socket and 1/4-inch socket bar
• 10mm open-end wrench
• 11/16-inch open-end wrench
• 3/8-inch open-end wrench
• 0.5mm plug gauge
• 4mm universal wrench
• Extension rod
Kit Parts Identification
Please refer to Figure 1:
(A) M6 * 12mm hexagon screw (9)
(B) M6 * 25mm flat-head screw (3)
(C) M6 self-locking washer (9)
(D) M6 * 16mm hexagon screw (6)
(E) Drive arm (3)
(F) M6 square nut (6)
(G) Interlocking kit (3)
(H) Oil filler pipe (1)
(I) Cable bracket (2)
(J) M6 self-locking washer (4)
(K) M6*10mm tapping screw (4)
(L) Cable assembly (2) - (5, 6, 8, 10-foot for lengths)
(A)
(B)
(C)
(D)
(E)
(G)
(H)
(F)
(G)
(G)
(I)
(J)
(K)
(L)
ote:
N
Three sets of interlocking devices (six cables) are
used to connect three circuit breakers, any two of
which can be closed at one time. Closing any two
circuit breakers leads to tripping of the third circuit
breaker.
Section 2: Installation of interlocking cable
Proceed with the following 11 steps:
Step1: Remove the hexagonal screws (four for 3 pole break-
ers and six for 4 pole breakers) from the front cover using
a 10 mm 1/4-inch socket wrench. Then pull down on the
charging handle by 45° angle to remove the front cover.
Figure 1. Contents of the parts package
Figure 2. Step 1
Screw