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Type F-122 Oil Circuit-Breakers
General Description
The type F-122 oil circuit-breaker is a
low
interrupting
capacity
embodying
the
desirable features
larger breakers, including internal mech
anism, wound type micarta bushings,
heavy
butt
type
contacts, " De-ion"
Interruptors, and silver-to-silver main
contacts.
This breaker has a large factor of
safety in interrupting capacity, being
thoroughly tested in the testing labor
atories at East Pittsburgh. The" De-ion"
Interruptor
assures
speedy and pos
itive
operation
with a
minimum
disturbance.
The contacts are of large cross section,
to
withstand
long
service
renewal.
The breaker will give excellent service
with a reasonable amount of care and
the instructions which follow should be
used as a guide in servicing this breaker.
Shipment
The breaker unit
will be shipped
separately, except when the mechanism
is bolted directly to the breaker unit,
boxed and fastened in the closed posi
tion. Operating mechanisms and details
may be shipped in separate containers,
all marked for easy identification.
Unpacking
Care should be used in unpacking the
circuit-breakers
and
parts,
small parts are not damaged.
precautions should be taken so that the
bushings are not damaged.
A careful inspection should be made,
to insure that no parts were broken or
damaged during shipment.
damage the proper claims should be
made to the transportation company.
Installation
1. Attach the breaker to the sup
porting
structure,
first
sure that the structure is level.
2. Remove the tank and examine
Westinghouse
600
Amperes,
3-Pole
Manually or Electrically Operated
the inside for evidence of moisture
and foreign matter.
insulating oil.
breaker
3. Connect the breaker to the oper
of
ating mechanism.
wire or blocking which holds the
breaker in the closed position, and
allow the breaker to open slowly.
4.
Examine the contacts and note
that they are clean and in align
ment. For adjustment see section
covering adjustment.
5.
Operate
the
hand
several
each
pole
of
mechanism to be sure all parts
move smoothly and freely.
6.
W hen the mechanism is remote
without
mounted, adjust the connections
between the breaker and operating
mechanism so that full contact
is obtained and the breaker rests
on the bumpers when in the open
position.
7. Install connections to the breaker
studs.
Fjrs/; Layer
Butt-lopped
Cotton Tape
of
{-<lyers
V.C.
Tap
so
that
Extra
. Finishing
alf-lapped Coffofl Tape
/l
In case of
Cord or Sew ends
tapinq for
fastenlnq. Tcpe
frictio n· tape
tem p orary
making
4160
Volts
8.
Flush with
Remove the
9.
10. Bolt the tank in place, being sure
circuit-breaker
by
11. Connect
times,
watching
and
the
operating
Breaker
mechanism
operation, so that the direction of oper-
Service
Volts
2500
4000
4500
6600
7500
Wrap the conductor with butt-lapped
layer of ".007 white cotton tape and
Half-lapped
(See
fable)
cover with one coat of No.
varnish (Westinghouse Catalog No. 311).
Then wrap with half-lapped layers of
".010 varnished cambric tape (Westing
Layer
house No. 1225 Tan Treated Cloth) ap
plying as many layers as given in the
above table.
insulating varnish (Westinghouse No.
of
311) between layers.
cambric with one layer of ".007 cotton
perrnanenf
w!fh
tape and wrap the ends with cord to
for
keep them in place.
fastening
coats of M-1736 black insulating varnish
(Westinghouse Catalog No. 414).
FIG. 2-lNsTRUCTIONs FOR TAPING CoNNECTIONs
3
Insulate
the
connections
with
varnished cambric and non-elastic
webbing in accordance with West
inghouse Standards for the various
operating potentials. See Fig. 2 .
With the tank removed, fill with
Wemco "C" oil to the line marked
on the tank or as directed on the
breaker name plate.
that it is drawn up evenly all
around.
the
breaker
frame,
through one of the mounting bolts,
to ground. The National Electric
Code requires grounding cable to
have one-fifth of the main circuit
capacity except that it must never
8
be smaller than No.
and need
not be larger than No. 0, B & S
gauge.
Adjustments
Mechanisms-The
toggle
is
designed for reversible
Layers of Varnished
Cambric Tape
5
6
7
8
9
insulating
Apply a coat of No.
Tape over the
Finish with two
9
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