GE AKR-30 Series Maintenance Manual page 129

So long as the act u ator rem a i n s i n the Reset posi­
tion, the b reaker can be c l o sed and opened n o rmal l y
a t w i l l . H owever, w h e n a c l osed b reaker receives a
trip s i g nal f ro m the prog ram mer u n it, t h e act u ator i s
energ ized a n d i t s solenoid f l ux o p poses t h e magn � t,
a l lowing the s p ri n g to re l ease the armat u re; t h 1 s
d rives t h e t r i p rod agai n st t h e tri p s haft p addle, tripp­
ing the b reaker.
As the b reaker opens, the act u ator arm-is ret u rned
to its normal ( Reset) pos i t i o n via l i n kage d riven by a
c ra n k o n the b reake r' s m a i n s h aft.
m ag n et again h o l d s the armat u re capt ive i n read i ness
for the next trip s i g n a l .
The t r i p device req u i res o n l y one adj u stment - t h e
tri p rod l e n g t h . A s s h ow n i
between the t r i p rod and the tri p s h aft p ad d l e is g aged
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 n c h . T o adj u st , o p e n the breaker a n d restore
the b reaker mechan i s m to i t s Reset pos i t i o n . Loosen
the j am n ut, rotate the adj u ster end u n t i l the proper
g ap is attai ned, then ret i g hten the j a m b n ut to 35 ± 5
i n-lbs.
The ac tu ator i s a sealed, factory-set dev i ce and re­
q u i res no m a i nten ance or f i e l d adj u stment. I n case of
malfunction, the comp lete act uator unit should be
rep l aced . When m a ki n g the electrical con nector to
the rep l acement u n it, it is recom m ended t hat the brea
ker h arness be cut at some conven ient point and the
new act u ator leads sold e r-s p l iced 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 extrac­
t i o n too l , Cat. No. 3051 83 as fol lows:
(
B R E A K E R
C L O S E D PO S I T I ON
T R I P
PAD DLE
FIG . 64 - FLUX S H I FT TRIP D EVICE A N D O P ERATING LINKAG ES
The permanent
-
n F i g . 66, t h e c l earance
)
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 f l ux s h i fter leads f rom t h e h arness.
2. Refe r r i n g to the cabl i n g d i a g rams in Section 1 0.5,
the flux shifter leads are RED for point 8 and BLAC K for
point E.
3. I n sert the ext ractor too l over the female p i n .
W h e n t h e ext ractor tool bottoms o u t , depress the
p l u n g e r and force the w i re/socket asse m b l y out of the
connector.
4. No too l is req u i red to i n se rt the w i re/socket
asse m b l y i nto the connector. I n se rt the assem b l y un­
til i t snaps i nto p l ace.
5. Verify a l l soc kets are i n serted to the same depth.
CAUTION :
IN THE EVENT THA T THE S S T TRIP DE­
VICE M U S T BE RENDERED INOPERA T/VE TO
A L L O W THE B R EA KER TO CA R R Y C U R RENT
WITHOUT BENEFIT OF O VERCURRENT PROTEC­
TIO N, THE R E C O M MENDED METH O D IS TO
SHORTEN THE TRIP ROD B Y TURNING ITS AD­
J U S TER END FULL Y C L O C K WISE. THIS PRE­
VENTS A C TUATION OF THE TRIP SHAFT PADDLE.
RESET
L I NKAGE
F R O N T
--
V I E W
49