GE AKR-30 Series Maintenance Manual page 227

So long as the act u ator re m a i n s i n the Reset posi­
tion, the b reaker can be c l osed and opened norm a l l y
a t w i l l . H owever, when a c l osed b reaker receives a
t r i p s i g nal from the programmer u n i t , the act uator i s
energ i zed a n d its solenoid f l ux opposes t h e magn � t.
al low i n g the spri n g to re l ease the armat u re; t h 1 s
d rives t h e tri p rod agai n st t h e t r i p sh aft padd l e , tri pp­
i n g the b reaker.
As the breaker opens, the act u ator arm-i s ret u rned
to its normal ( Reset) pos i t i o n via l i n kage driven by a
c ra n k on the b reaker's m a i n s h aft.
mag net agai n holds the armat u re captive in read i n ess
for t h e next t r i p s i g na l .
T h e t r i p device req u i res o n l y one adj u stment - t h e
t r i p rod l e n g t h . As shown r n F i g . 66, the c l earance
between the t r i p rod and the t r i p shaft pad d l e i s gaged
by a 0 . 1 09 i nc h d i ameter rod . Adj u st gap to 0. 1 09 i n c h
± 0.031 i nc h . To adj u st, o p e n the b reaker a n d restore
the b reaker mecha n i s m to its Reset posi t i o n . Loosen
the jam n ut , rotate the adj u ster end u n t i l the proper
gap is attai ned, then ret i g hten the j a m b nut to 35 ± 5
i n - l bs.
The actu ator is a sealed, factory-set dev i ce and re­
q u i res no mai ntenance or field adj ustment. In case of
m a l f u n c t i o n , the comp lete act u ator u n i t s h o u l d be
rep l aced . When m a k i n g the e l ectri cal con nector to
the rep l acement u n i t, i t is reco m m ended t h at the brea
ker harness be cut at some conven ient point and the
new act u ator leads solder-sp l i ced together.
The preferred method is to remove the f l u x s h i fter
leads from the A M P con nector u s i n g the A M P ext rac­
t i o n too l , Cat. No. 305 1 83 as fol l ows:
(
C L OS E D P O S I T I ON
B R E A K E R
TR I P
PA D DLE
FIG. 64 - F L UX SHIFT TRIP DEVICE A N D O P ERATING L I N KAG ES
The permanent
)
C R A N K
MA I N
S H A F T
S I D E
V I E W
1 . Remove t h e flux s h i fter leads from the h arness.
2 . Referri ng to the cab l i n g d i ag rams in Section 1 0.5,
the flux sh ifter leads are RED for point B and BLACK for
point E.
3. I n se rt the extractor too l over the fe male p i n .
When t h e extractor tool botto ms out, depress the
p l u n ger and force the w i re/socket asse m b l y out of the
connector.
4. N o tool i s req u i red to i n sert the wi re/socket
asse m b l y i nto the conn ector. I n se rt the assem b l y u n ­
t i l i t s n a p s i n to p l ace.
5. Verify a l l soc kets are i n serted to the same depth.
CAUTION :
I N THE EVENT THA T THE SST TRIP DE­
VICE M U S T BE RENDERED INOPERA TIVE TO
A L L O W THE B REA KER TO CA R R Y C U R RENT
WITHO U T B ENEFIT OF O VERCURRENT PROTEC­
TI O N, THE R E C O M M ENDED METHOD IS TO
SHO R TEN THE TRIP ROD B Y TURNING ITS A D­
JUSTER END FUL L Y C L O C K WISE. THIS PRE­
VENTS A C TUA TION OF THE TRIP SHAFT PADDLE.
RESET
L I NKAGE
FRON T
V I E W
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