Magnum
42
1812.900A
Figure 3-49: IP54 Waterproof Cover
IP54 Waterproof Cover - A hinged dome shaped
waterproof cover attaches to the metal compartment
door to provide waterproof protection for the circuit
breaker (Figure 3-49).
Mechanical Interlock - A family of mechanical interlocks
are available to interlock the closing of two or three
Magnum 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 which 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 2-way and 3-way versions. An illustration of a 2-
way cable interlock mounted on two drawout circuit
breakers is shown in Figure 3-50.
Mechanical (Pop-Out) Trip Indicator - A red, pop out
mechanical trip indicator is an optional Magnum feature.
It is located above the trip unit on the breaker’s front
faceplate (Figure 3-17). It operates by releasing and
popping out any time the circuit breaker trips due to to
an overcurrent condition.
Note that the mechanical trip indicator will not prevent
the breaker from being reclosed.
Figure 3-50: Cassette-Mounted 2-Way Cable Interlock
