Page xvi
IB131021EN
Effective Mar 2018
4-6.1
CIRCUIT BREAKER INSERTION AND
REMOVAL
NOTICE
Inserting breaker:
A. Lower compartment direct roll-in-breaker
Push the breaker into the breaker compartment until the
breaker T-handle latches over the moving block on the
levering screw assembly. In this position, the breaker is
considered in the Disconnect position.
B. Upper compartment or non-direct roll-n-breaker
The breaker compartment has an interlock assembly
1.
on the compartment levering assembly, located on
both the left and right hand rail assemblies. The
purpose of the interlock assembly is to prevent the
breaker from being removed from the compartment
without the extension rails in place.
Inserting the appropriate rail, identified with a label,
2.
diagonally into the slot such that the extension rail,
when lowered, unlocks the interlock allowing an
installed circuit breaker to roll forward. The rolling
surfaces of the compartment rail and extension rail are
flush.
In this position, the breaker can be inserted or
3.
removed from the breaker compartment (see Figure 4-
1A and Figure 4-1B).
Figure 4-1A Insertion of the Drawout Extension Rails
F
i
g
u
r
e
4-
1
B
Lifting and Setting the Breaker in the Housing
Checking pan operation:
A.
T
o
o
p
e
r
a
te
t
h
e
b
r
e
a
k
e
r
a
t
t
h
is
t
i
m
e
(
t
e
st position mode), it is necessary to connect the
secondary harness with the breaker.
Manual secondary:
For a manually engaged
secondary
harness, Pull the secondary plug handle forward until the
secondary receptacle located on the compartment levering
pan fully mates with the secondary breaker wiring plug.
Automatic secondary:
For an automatically engaged
secondary harness, rack the breaker into the test position
identified by the Breaker position indication (BPI) label.
In these positions, the breaker control circuit can be tested
offline. (Breaker is not connected to the primary circuit.)
Movement of the breaker from the Disconnect or Test
B.
position to the Connect position.
As the breaker is racked from Disconnect or Test, it
1.
will automatically open if it is closed.
To prevent damage with a manually engaged
2.
secondary, the breaker secondary control plug must
be manually engaged with the receptacle on the
compartment levering system, before the breaker is
moved to the connected position.
