()
8. Tighten the jewel bearing
set
screw to
2.5-3.5
inch
pounds
of torque.
9.
Rotate the disk through the electromagnet gap.
The
disk should
clear
the
~ap
surfaces
by
0.010
inch
and
be
within 0.005 inch
flatness.
If
the disk
is
not within 0.005 inch
flatness
the disk
should
be
replaced.
10. Reinstall the drag
magnet
assembly
and
check
that
the disk
has
at
least
0.010 inch clearance
from
the drag
magnet
assembly surfaces.
11. Tighten the drag
magnet
assembly
mount·ing
screws with 7-10 inch
pounds
of
torque,
after
securely
seating the assembly
and
positioning
it
according to the
Time
Test above.
HI-SEISt~IC
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
po'le
piece, the cross
member
of the
"T"
spring should
be
in a
horizontal plane
and
there should
be
at
least
1/64"
wipe
on
the contacts.
Check
this
by
inserting
a 0.010"
feeler
gage
between
front
half
of the shaded pole with the armature held\
close.
Contacts should close with
feeler
gage
in place.
4.
Since mechanical adjustments
may
affect
the Seismic
Fragility
Leve·1,
it
is
advised
that
no.
mechanical adjustments
be
made
if
seismic
capability
is
of concern.
HI-SEISMIC
TARGET
AND
SEAL-IN
UNIT
Check
l
and
2
as
described under Instantaneous Unit.
To
check the
wipe
of the
seal-in
unit,
insert
a
O.O'IO"
feeler
gage
between
the
plastic
residual
of the armature
and
the pole piece with the armature held closed. Contacts should close with
feeler
gage
in place. Since mechanical adjustments
may
affect
the Seismic
Fragility
Level,
it
is
advised
that
no
mecnan1cal
adjustments
be
made
if
seismic
capability
is
of concern.
It
is
recommended
that
sufficient
quantities
of
renewal
parts
be
carried in stock to enable the
prompt
replacement of
any
that
are viorn, broken or
damaged.
When
ordering renewal
parts,
address the nearest
Sa
1 es Office of the
Genera
1
Electric
Company,
specify quantity required,
name
of the
part
wanted,
and
the complete
model
number
of the relay for
which
the
part
is
required.
15
Courtesy of NationalSwitchgear.com
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