Receiving, Handling, And Storing; Inspection; Storing - Westinghouse DB-50 Instructions Manual

Page 6
PART
Type " DB-50" air circuit breakers , with
all attachments mounted in place, are
shipped in special cartons.
Important: To a void damage to the
breakers , do not use hooks in handling.
Net weights of Type DB-5 0 are given in
Table No. 1 below.
TABLE
Type DB-50
2 - Pol e
MANUAL 220
ELECTR I C
295
Add 30 Lbs. for Drawout Detail s.
Immediately upon receipt , examine ship­
ment for any loss or damage incurred during
transit. If injury or rough handling is evi­
dent, file a damage claim at once with the
transportation company
nearest Westinghouse Sales Office.
When unpacking, be sure that no loose
parts are miss ing or left in the packing
material. Report all shortages at once.
Blow out any dust or particles of packing
material that may have accumulated on the
circuit breaker parts. Do not remove tape
from top of arc chutes until breaker is to
be placed in service.
INSP E C TION
The " DB" breaker assembly consists of a
coordinated g r o u p
mounted on a steel supporting panel. The
complete breaker assembly is to be mounted
with the steel panel in a vertical position.
All inspections for prope r operation should ,
therefore , be made with the breaker in this
position. Final inspection should preferably
be made with the breaker in its permanent
mounting.
Inspect the breaker as follows :
1 . Raise and lower the trip bar by hand to
make sure that it does not bind.
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1

RECEIVING, HANDLING, AND STORING

NO. 1
3 - Po I e
I
I bs . 280 b s .
355 I bs .
I bs .
and notify the
of sub-as semblies
2 . Rotate the manual operating handle
slowly in a clockwise direction to move the
contacts toward the closed position.
a. Observe whether all parts are in
proper alignment and move freely.
b. Make certain that the studs have
not been forced out of alignment.
c. Be sure that the contacts are clean
and properly aligned. For a description of
contact alignment , refer to " Contacts " ,
Page 9 .
3. If the contacts are in alignment and all
parts move freely, continue the clockwise
rotation until the breaker is latched.
4. Push the push-to-trip button to trip the
breaker.
a. The toggle linkage should collapse
and the moving contact assembly move
freely to the full open position. This should
be followed immediately by complete re­
setting of the links in the toggle mechanism.
b. The links must always be free to
move without friction or binding.
5. Check the attachments for operation in
accordance with the appropriate instructions
as given under " Maintenance" , P art 3 of
this book.
NOTE: It is not advisable to l ubricate any parts
of the breaker. The lubrication suppl ied during
factory assemb l y is sufficient for years of serv­
ice. The lubricant is of a special form which is
used sparing l y. The addition of oil wil l on l y pro­
mote the accumul ation of dust and dirt.

STORING

If circuit breakers are not to be installed
in their permanent location at once , they
should be carefully inspected for loose or
damaged parts and then stored in a clean
dry place in an upright position to avoid
damage to the circuit breaker parts.
covering of paper will prevent dust from
settling on the circuit breaker parts and is
preferred to packing or other materials
that are apt to absorb moisture.
A