GE IAC77A Instructions Manual page 18

GEK-34055
INSTANTANEOUS UNIT
1. Both contacts should close at the same time.
2. The backing strip should be so formed that the forked end
(front)
bears against the molded strip under the armature.
3. With the armature against
the pole piece, the cross member of the
'T" spring should be in a horizontal plane and there should be at
least 1/32
inch wipe on the contacts.
Check this by inserting a
0.012 inch feeler gage between the front
half of
the shaded pole
and the
armature, with the armature held
closed. The contacts
should close with the feeler gage in place.
TARGET AND SEAL-IN UNIT
Check steps 1 and 2 as described under INSTANTANEOUS UNIT above.
To check the wipe of the seal—in unit,
insert a 0.012 inch feeler
gage between the plastic resid a1 of the armature and the pole
piece
with the
armature held close The contacts should
close
with
the
feeler gage in place.
RENEWAL PARTS
It
is recommended that sufficien t quantities of
renewal parts be
carried in stock
to enable the prompt replacement of
any that are
worn, broken,
or damaged.
When ordering
renewal parts, address the nearest Sales Office
of
the General Electric
Company, specify the quantity required and the
name of the part wanted,
and the complete model number of the relay
for which the part is required.
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