Westinghouse F-122 Instruction Book Download

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Westinghouse Type F-122 Oil Circuit-Breakers

and the breaker to the panel.

The

breaker should be mounted as nearly

level  as  possible.  The  nipple  supplied
with the  breaker units should be screwed
into  the  rod  end  of  the  rear  of  the  oper

ating handle and the mechanical set-up
will be complete.

By adjusting the

amount by which the nipple is screwed

into the rod end, it is possible to vary the

contacts  in  the  breaker.  This  adjust
ment  should  be  made  in such  a  way  that
full  contact  is  obtained  in  the  breaker

when  the  handle  is  latched  closed.  In
adjusting  the breaker special care should
be  taken  to  see  that  the  toggle  lever  is

of an inch, or less, from the stop pin

in the closed position. See Fig. 3 and
instructions under "Adjustments."

this adjustment is not correct, the latch
load on the coverplate will be excessive

and the tripping attachments may not
function properly. With this adjustment

correct, the signal switch should make
good contact in both the open and closed

positions  of  the  breaker.  It  should  be
observed  that  proper  contact  in  the
breaker  is  necessary  in  order  to  get
proper  contact  on  the signal  switch.

When the adjustment of the breaker

and  signal  switch  is  correct  and  oper
ating  properly,  then  the  tripping  cores
can  be  put  in  place,  and  the  nuts  put  on
which  hold  them.  If  an  under-voltage
release is supplied, it may now be mount

ed on the coverplate and the leads thrust

through the clearance between the cover

plate and the panel, and then drawn

back through the holes drilled in the
panel for the leads.

For mounting other auxiliaries on the

switchboard mounting breaker, see des

cription under the heading of "Mounting
of the Auxiliaries". (See page 8).

Mounting of Remote Control

Breaker

The remote control breaker unit should

be mounted in place upon the wall or

pipe as nearly level as possible, and the

operating rod end reversed so that the
offset will be as shown in Figs. 3 and

The auxiliary switch and bell alarm
contacts,

supplied, should be mounted

in  the  coverplate  before  the  coverplate
is mounted on the panel or panel bracket.
The  two  extra  bolts  supplied  with  the
two-coil  coverplate  should  be  discarded.

The coverplate can then be mounted as
shown in Fig. 8, with the coils in place in
the coil

box.

The tripping cores can then

FIG. 6-SINGLE HANDLE 2-COIL COVERPLATE

be put in place on the coverplate and
tightened.

Here again, if an under

voltage  release  is  used,  it  may  be  placed
on  the  coverplate  after  it  is  assembled
to the panel by pushing the leads through
the  clearance  between  the  coverplate
and the panel,  and pulling  them through
the  drilled  holes  in  the  panel.  All  con

nections  should  be  made  after  the  me
chanical assembly is complete. The cover
plate  and  breaker  units  should  then  be
connected  together  with  operating  rods
through  the  bell  cranks  as  shown  in
Fig.  8.

The connecting pipes are %-inch

x strong pipe, and should be cut

inches

shorter  than  the  distance  between  ful
crums  of  the  levers  to  be  connected.
These  pipes  should  be  threaded  2%

inches on each end  with  %-inch  straight
pipe  thread.  A  %-inch  pipe  lock  nut
should  be  put  at  one  end  or  the  other
of  each  pipe,  with  the  exception  of  the

breaker unit end. A pipe nut should

never  be  used  on  the  breaker  unit  end.
The  length  of  the  pipe  should  be  ad
justed  so  that  the  travel  of  each  crank
lever  is  approximately  equal  on  each

side of the horizontal or vertical center

line.

The last length should be ad

justed so that with the handle in the

latched position, the contacts in the

breaker are making full contact, as

previously described. With proper ad

justment  on  the  breaker  contacts,  it
will  be  observed  that  proper  contact  is
secured  on  the  signal  switch  if  one  is

used. The bell cranks as supplied are for

mounting above the floor. If it is de

sired to mount the bell cranks below the

floor, it is necessary to reverse them.

To reverse the bell cranks, remove the

fulcrum pin and replace it in the lower

hole.  To reverse the accelerating  device
it  is  necessary  to  remove  the  fulcrum
pin  and  to  replace  it  in  the  upper  hole.
It is also necessary to  change  the  acceler
ating  spring  on  the  accelerating  device.

See Fig.

Any length of pipe exceeding

feet

should have an intermediate support. The

operating rods should all be in tension
except the one next to the breaker, and

in applications where this vertical rod
is long enough, to cause buckling under

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