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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
IP54 waterproof cover—A hinged dome-shaped waterproof
cover attaches to the metal compartment door to provide
waterproof protection for the circuit breaker (Figure 4-18).
Mechanical interlock—A family of mechanical interlocks
is available to interlock the closing of two or three circuit
breakers. The mechanical interlock holds one or more circuit
breakers tripped (prevents closure) when others are closed.
A lever assembly is mounted on each breaker that interfaces
with the pole shaft and the tripper bar. The lever assemblies
are interconnected with either cables or rods, depending
upon the relative orientation of the breakers. Rods can be
used only when the circuit breakers to be interlocked are
vertically stacked. Cables can be used for any orientation
of the breakers. Mechanical interlocks are available for both
fixed and drawout circuit breakers and in both two-way and
three-way versions. An illustration of a two-way cable inter-
lock mounted on two drawout circuit breakers is shown in
Figure 4-19.
Figure 4-18 IP54 waterproof cover
Figure 4-19 Cassette-mounted two-way cable interlock
