Mechanical Inspection - GE IACS3A Instructions Manual

MEC HANICAL INSPECTION
l. Ther e s hould
r otated s lowly clockwis e.
to its r es t pos ition .
2. Ma ke s ur e
con volution s ta n gled or touchin g.
The a r ma tur e a n d con ta cts of the s ea l- in unit, a s well a s the
3 .
a rmature and contacts of the in s ta n ta n eous unit,
freely when operated by ha n d;
wipe on the s ea l- in con tacts .
The ta r gets in the s ea l-in un it a n d in the in s ta n ta neous un it
4.
mus t come into view a n d latch when the a r ma tur es a r e oper a ted
by ha nd,
opera ted.
Make s ur e tha t the finger s a n d s hor ting ba r s
5.
interna l-con nections dia gr a m.
E very circuit
It is especially
circuits with shorting bars that the auxiliary brush be bent
high enough
before the
Transformer)
ELECTRICAL TESTS
DRAWOUT RE LAYS, GENE RAL
Since a ll drawout r elays in s ervice oper a te in their ca s es ,
recommended that they be tes ted in their ca s es or a n equiva lent s teel
th i s
case. In
a ccura tely duplicated durin g testing.
removing it from the pa nel by us ing a l2XL A13A tes t plug.
makes conne t i on s
c
s hor ting ba r s in the ca s e.
Although this
requires C.T. s hor ting
s in ce conn ections
circuitry.
POWER RE QUIRE MENTS, GENERAL
All devices oper a tin g on a lter na tin g cur rent (AC ) a re a ffected by
Since
fr equency.
fun da menta l fr equency
it follows tha t a lterna ting-curr ent devices
by a pplied wavefor ms .
GEK-34054
be n o n oticea ble
the contr ol
a n d s hould unlatch when the ta r get-relea s e lever
CAUTION
in the drawout
important
to engage the
main brushes do.
secondary circuits from being opened.
way, any magnetic
n y w i th
the
o l
The l2XLA12 A tes t plug ma y a ls o
tes t plug a llows
jumpers
a r e ma de to
n on - s in us oida l
plus ha r mon ics
AC r ela ys
fr iction
The dis k s hould r eturn
s pr in g is n ot
ther e s hould be at lea s t 1/32"
case has an auxiliary
on current circuits
connecting plug
This will prevent
effects of the
A r elay may be tested without
r elay, a n d does
greater testing
a n d the ex ercis e
both the rela y
wavefor ms ca n
of tha t fun da men ta l
( r elays )
(a n d AC devices
11
when the dis k
by its elf
defor med, n or
s hould move
agr ee with the
brush.
and other
or test plug
CT (Current
it is
enclosure will
T his plug
n ot dis turb
us ed.
be
flex ibility,
of gr eater ca r e,
a n d the exter n a l
be a n a lyzed a s
f r equen cy,
will be a ffected
in gen er a l )
is
its
is
be
a n y
it
a
a r e