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Cell Inspection
Before inserting a breaker into
a module, remove foreign
objects, tools and debris, or
obstructions from inside the
module.
Prior to first insertion of breaker into cell, it
is important to inspect the breaker cell
operating components listed in (
Figure 4.16
).
Figure 4.16 Cell locations
All circuit breakers of like rating are
interchangeable
Circuit breakers have three positions in the
housing.
1. The DISCONNECT position disengages
the main disconnecting devices, and the
control contacts on the breaker. They
are a safe distance from the stationary
part of the device located on the
housings.
2. The TEST position disengages the main
disconnecting devices, and engages the
control contacts. This position allows
operation of the circuit breaker for
testing.
3. The CONNECTED position engages the
main and control disconnecting devices
on the breaker.
Mechanical interlocks prevent moving a
circuit breaker from one position to another
unless the circuit breaker is open. The
interlocks also prevent closing of the
breaker between positions.
DANGER
Insure that all power to the cell has been
removed and proper lock-out tag-out
procedures have been performed prior
to cell inspection.
