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Ass em.*! for dowri pull
operation
Ftc. 9-ToGGLE AssEMBLIEs
coverplate as shown in the picture, and
all screws tightened.
It will be found
that to put the brackets on first and to
insert the interlock bar in place after
the brackets are lined up will make the
a ssembly easy.
It should be observed
that the interlock bar moves freely and
is returned to the neutral position by
the spring when the handle releases it.
The movement of one handle to the
closed position should move the inter
lock bar over the other handle so that
it locks on the straight part of the bar
and not the beveled part.
Adjustment
is provided so that the length may be
altered when assembling.
When this
interlock is used in addition to
a
device on one of the handles, a hole in
the mounting bracket of the electric
lock-out device takes the interlock bar
one
of
the
interlock
mounting
and
brackets should be omitted.
If for any
reason the interlock bar does not move
freely, it will be necessary to properly
line up the holes in which it is supported.
This can be done by loosening the cover
plate mounting bolt and moving the
coverplate bodily to alignment. In very
extreme cases it may be found necessary
to file the top lug of the mounting
bracket to line up.
Mechanical Sequence Interlock-The
mechanical sequence interlock can be
Westinghouse Type F-122 Oil Circuit-Breakers
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Assem•c for up push
operation (Standard)
mounted on a double-handle coverplate
only.
The brackets for the sequence
interlock are held in place by a special
pin which replaces the fulcrum pin of the
handles, omit spacing washers for handle
on one side of each handle only.
adjusting screws at top and bottom
should be adjusted so that there will be
no binding between the cam-shaped slot
and the interlock pins on the coverplate
lever.
The interlock pins replace the
standard pins for the rod ends. See Figs.
20
to
25.
Undervoltage Release Attachment
The hand retrieved undervoltage release
attachment mounts on the left hand
mounting bolt of the coverplates.
lock-out
is necessary to remove this bolt and to
put it in from the rear of the panel,
screwing it into the undervoltage cover.
Tightening the two undervoltage release
mounting bolts clamps the undervoltage
release tightly in the proper position.
After it is completely mounted, operate
it a few times by hand to see that the
movement is free and that it operates
properly. See Fig.
1 2.
The automatic retrieve undervoltage
release mounts on the right hand side of
the coverplate in a similar manner.
is necessary to bolt a reset pin to the
trip lever of the coverplate to operate
this device. See Fig.
10
Other Tripping Devices-The over
load trip, the shunt trip, and the overload
trip with dashpot, mount on the cover
plate by passing the core up through
from the bottom into position in the
coverplate and then securing it there by
means of one nut.
with the dashpot below, should not be
mounted on the coverplate until the
mechanical
This is necessary in order that all the
bolt heads will be easily accessible.
Signal Switch and Bell Alarm-As
indicated above, it is necessary
the signal switch and bell alarm in pos
ition on the coverplate as shown in
Figs.
6
and
put on the panel, otherwise it would be
very difficult to tighten the screw which
clamps it in position.
is mounted in the coverplate by
head machine screw.
After the breaker has been assembled,
with its operating handle and auxiliaries
as described above, the electrical con
nections should be made in accordance
The
with
the
complete installation, if covered by a
complete diagram, or in accordance with
the diagram furnished in this instruction
book.
In case copper strap connections
are to be used, they should be carefully
grained before putting on and the con
tact nuts should be drawn down so as to
bear evenly over their entire area. The
lower contact nut should not touch the
upper clamping nut of the bushing. The
It
connection should have an area of not
less than that given by the National
Electric Code tables on allowable carry
ing capacity of wires and cables.
fastening in the main leads, the ter
minals should be insulated wth tape or
insulating tube.
instructions. Good engineering practice
demands that all terminals on circuit
breakers be insulated.
Maintenance of Accessories
It
Coverplate and Handle-The mechan
ical parts of the coverplate
1 3.
should be kept in good condition in order
The tripping cores
installation
is
complete.
to
mount
1 1 ,
before the coverplate is
This attachment
a
flat
Connections
diagram
furnished for
the
After
See Fig. 2 for taping
and
handle
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