If
it is necessary to replace the jewel, the jewel
should be turned up until the disk is centered in the
air gap, after which it should be locked in position
by the set screw provided for the purpose.
CONTACT CLEANING
For cleaning fine silver contacts, a flexible
burnishing tool should be used. This consists of a
flexible strip of metal with an etched roughened
surface, resembling in effect a superfine file. The
polishing action is so delicate that no scratches are
left, yet corroded material will be removed rapidly
and thoroughly. The flexibility of the tool insures
the cleaning of the actual points of contact. Some
times an ordinary file cannot reach the actual points
of contact because of some obstruction from some
other part of the relay.
Voltage Relays Type IAV GEH-1814
Fine silver contacts should not be cleaned
with knives, files, or abrasive paper or cloth.
Knives or files may leave scratches which increase
arcing and deterioration of the contacts. Abrasive
paper or cloth may leave minute particles of in
sulating abrasive material in the contacts and thus
prevent closing.
The burnishing tool described above can be
obtained from the factory.
PERIODIC TESTING
An operation test and inspection of the relay
at least once every six months are recommended.
Test connections are shown in Figs. 18 and 19.
RENEWAL PARTS
It is recommended that sufficient quantities of
renewal parts be carried in stock to enable the
prompt replacement of any of those worn, brokep. or
damaged. Parts bulletin number GEF-2149 gives a
list of those most subject to wear in ordinary oper
ation and to damage due to possible abnormal condi
tions.
SEAL-IN
UNIT
When ordering renewal parts, address the
nearest Sales Office of the General Electric Com
pany, specify quantity required, name of part wanted
as shown by Figs. 16 and 17 and give complete
nameplate data, including serial number.
If
possi
ble give the General Eelectric Company's requisition
on which the relay was furnished.
VOLTAGE
UNIT
INTERNAL CONNECTIONS (FRONT VIEW)
•
•
SHORT FINGER
Fig.
15
Internal
Connections Of
The TJpe IAY53C
Relay,
Front VIew
13
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