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GEK-49822
ACCEPTANCE TESTS
Immediately upon receipt of the relay an INSPECTION AND ACCEPTANCE TEST should be
made to
ensure
that no damage has been sustained in shipment and that the relay
calibrations have not been disturbed.
If the examination or the test indicates that
readjustment is necessary, refer to the section on SERVICING.
Since operating conipanies use different procedures for acceptance and installation
tests, the following section includes all applicable tests that may be performed on
these
relays.
These
tests
may
be
performed
as
part
of
the
installation
or
acceptance tests, at the discretion of the user.
VISUAL INSPECTION
Check the nameplate stamping to ensure that the model number and rating
of
the relay
agree with the requisition.
Remove the relay from its case and check that there are no broken or cracked molded
parts or other signs of physical damage and that all screws are tight.
Check that
the shorting bars are in the proper location(s) as shown by the internal connec
tions diagrams,
Figures 5
to 9,
inclusive,
and that the
main
brush
is
properly
formed to contact the shorting bar.
MECHANICAL INSPECTION
Top Unit (TOC)
1.
The disk shaft end play should be 0.005—0.015 inch.
2.
The disk should be centered in the air gaps of both the electromagnet and drag
magnet.
3.
Both air gaps should be free of foreign matter.
4.
The
disk
should
rotate
freely
and
should
return
by
itself
to
the
reset
position.
5.
The moving contact should just touch the stationary contact when the time dial
is at the 0 time dial position.
Bottom Unit (DIR)
1.
The rotating shaft end play should be 0.015—0.020 inch.
2.
The contact gap should be 0.015—0.025 inch on the low gradient contact.
Target and Seal-in Unit/Instantaneous Unit
1.
The armature and contacts should move freely when operated by hand.
2.
Both contacts should make at approximately the same time.
3.
The target should latch into view just as the contacts make and should unlatch
when the target release button is operated.
4.
The contacts should have approximately 0.030 inch wipe.
13
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