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Bearing
FIG. 7-ACCELERATING DEVICE SHOWING ASSEMBLY FOR ABOVE AND BELOW FL OOR MouNTING
strain of closing the breaker, it will be
necessary to reverse the accelerating
device and also to reverse the toggle in
the breaker so that this rod will be in
tension instead of compression.
reverse the toggle in the breaker the
toggle lever should be reversed and the
toggle links connected to the hole in the
other end of the toggle lever. The con
tact pressure should always be checked
after making this change, as it may be
necessary
to re-adjust the conta-:: t s.
This will cause the toggle to close the
breaker with a downward motion of the
and 9.
operating rod.
See Figs.
3
Westinghouse Type F-122 Oil Circuit-Breakers
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BELL CRANK SHoWING AssEMBLIES FOR A novE AND BELOW FLOOR MoUNTING
Mounting of the Auxiliaries
Electric Lock-out
lock-out device mounts on the side of
the breaker unit and is attached to the
breaker frame as shown in Fig. 18.
To
is necessary to replace the standard pin
in the breaker operating lever by the
special large headed pin supplied with
the device. It should be observed that
the armature moves freely, and that
with the armature closed, the large
headed pin has clearance to pass; while
wit hthe coil de-energized, and the arma
ture open, the lug is under the pin and
successfully prevents the breaker from
closing.
Device-The electric
Mechanical
single-handle coverplates, or the two
handles of a double-handle coverplate,
It
are to be interlocked so that only one can
be closed at a time, the mechanical inter
lock is used.
mount this attachment, it is necessary to
remove the fulcrum pin from the cover
plate handle, and take off the spacing
washer for the handles on the side next
to the coverplate with which it is to be
interlocked. Then the mounting brackets
of the interlock may be placed on the
8
Interlock-When
two
See Fig. 19.
In order to
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