Breaker pan assembly
Callout descriptions for Figure 4-2C
Grounding contact grounds the breaker in positions.
1.
The levering system prevents removal of the breaker
2.
in any position other than the Disconnect (or Test)
position.
The control wiring is arranged for pullout disconnecting
3.
by means of a 25-point female receptacle arranged to
connect to a male plug on the breaker. The secondary
disconnect is the connection for the control leads
between the removable breaker and the stationary
housing (see the breaker instruction book for further
description).
Manual secondary:
Represents a manually engaged
secondary assembly that requires the customer to engage
the secondary harness manually when the breaker is in the
Disconnect position. When engaged, the breaker will now
be in the Test position.
Automatic
secondary:
Indicates
an
automatically
engaged secondary as offered on the BPI pan assembly
and requires no manual input from the customer to engage
the secondary harness. The secondary harness will
engage automatically when the breaker is levered-in to the
discrete Test position.
The secondary harness will then disengage automatically
when the breaker returns to the Disconnect position.
Racking screw performs breaker insertion and
4.
withdrawal.
Moving block couples to breaker for insertion and
5.
withdrawal.
Slider is used with #8 to prevent levering a closed
6.
breaker. May also be used in conjunction with #12 to
padlock a breaker in either position.
Indicates when the breaker is in the fully connected
7.
position.
Standard indication:
Represents positive indication of the
breaker in the Connect position by use of a red flag that
rotates into viewing position when the breaker is fully
connected.
BPI (breaker position indication) Label:
Represents
positive indication of breaker location at any position
through use of a colored label mounted on the top flange of
the right hand rail assembly. Green indicates the
Disconnect position, yellow indicates the Test position and
red indicates the Connect position. Upon arriving at any of
the three discrete positions; Disconnect, Test, and
Connect, there is a black mark that aligns with the breaker
cover to indicate exact location.
Slider interlocks prevent removing a closed
8.
breaker.
The breaker MOC (mechanism-operated
9.
compartment) switch is an assembly of
switches that is operated by a lever on the
breaker mechanism. It can contain as many
as 15 normally closed and 15 normally open
contacts (beneath the cover) in the standard
design.
The MOC switch is activated by the breaker
closing. It extends a plunger out the bottom
of the mechanism and Pushes down on the
MOC switch operating mechanism. This, in
turn, transmits the motion to operate the
switch.
The TOC switch (truck operated
10.
compartment) has nine poles in the normal
design – four contacts make and five break
as the breaker is levered to the connected
position. As the breaker is being levered into
the connected position, a bracket on the
breaker pushes the TOC switch lever during
the last inch of travel. As a result, the TOC
switch can be used to electrically indicate
whether or not the breaker is in the
connected position (beneath cover).
Code plates: (see Safety features).
11.
Provision for padlocking a breaker in any
12.
position. Also a location for a key interlock.
Metal framework provides a closed barrier to
13.
the primary compartment when the breaker
is connected.
Rail on which the breaker rolls.
14.
Optional MR2 Integral racking provisions for
15.
inclusion during manufacturing or
aftermarket
