GE SBC23A Instructions Manual page 8

SB C23A
The IT u n i t i n t h e SBC23A h a s two o u tput co ntacts.
w i th t h e power s uppl y and i s u s ed a s a s e a l - i n fu nct i on, a s prev i o u sl y no ted.
o the r co n tact i s e l ectr i cal l y separa te, a nd ca n be u s e d to prov i d e an i n s ta n ta neo u s
ou tpu t from t h e l ev e l de tector.
be u s e d to app l y a n add i t i onal t r i p s i gnal to t h e a s soc i a ted pr i ma ry breake r.
SB C23B
The SB C2 3 B rel ay i s s i m i l a r to t h e S B C 2 3 A except t h a t t h e IT u n i t h a s o n l y a s i n gl e,
el ectr i ca l l y sepa ra te,
i ncl u d ed. The fu nct i on of the con tact co n v e r te r i s to co n v e rt a co n tact ope ra t i on
i n to a s i g n a l that i s compa t i bl e w i th the l o g i c c i rcu i t o f t h e S B C rel ay.
cl o s i n g a n exte rn a l con tact, D C i s s uppl i ed to t h e co n tact co n v e r te r a nd a n o u tput
s i g n a l i s produced from CCl o nce the power s uppl y
i n i t i a t i on ( B FI, 6 2X, 6 2 Y ) .
two ways; t h e cho i ce depends on t h e po s i t i on o f the tap t ha t precedes t h e A/0 t i mer.
I f the tap i s pl aced i n t h e O R pos i t i on, t h e A/0 t i me r i s con t rol l ed by a n o u tput
1
from t he evel de tector OR an o u tp u t from CCL
t h e l e vel d etecto r and CTI re set or the co n tact i n i t i a t i o n re s e t s.
pl aced i n t h e AND po s i t i o n, the A/0 t i me r i s co n tro l l ed by an o u tp u t from the l ev e l
d etecto r AND a n o u tput from C C l v i a t h e AND2 l o g i c fu nct i on.
t i me r w i l l re s e t
i n i t i a t i on re s e t s.
The IT u n i t ca n be opera ted d i rectl y from e i t h e r t h e l ev e l d e tecto r o r t h e co n tact
con v e rter, depe nd i n g on t h e l i nk s e tt i n g.
The IT I co n tacts a re n o rmal l y compl e te l y i s o l a ted.
from the ( B FI, 6 2X, 6 2Y ) i npu t termi n a l to a n i n t e r n a l l u g ( l l A) .
( l l A) to t e rm i nal ( l i ) i n te rnal l y, a nd co n n ect i n g ( l i ) to +DC exte rnal l y, a s e a l - i n
fea t u re can be obta i n ed.
SB C2 3 C
The S B C 2 3 C re l ay i s s i m i l a r to t h e S B C2 3 A except t h a t o n e mo re t i me r ( B/0 ) a n d a
con tact co n v e rter have been ad ded.
the same ra nge a s t h e ( A/0 ) t i me r.
t i mer requ i re s ( 1 ) t h e B FI co n tacts mu s t be cl o s ed, ( 2 ) i npu t c u r r e n t m u s t be abo v e
p i ckup l evel , a nd ( 3 ) t h e co n tact co n v e r te r C C I m u s t b e e n e rg i zed.
Wi th the IN/OUT rel ay i n the OUT po s i t i o n, the B/0 t i me r o n l y re qu i re s ( 1 ) the B FI
co n tacts m u s t be cl o sed a nd ( 2 ) t h e con tact Co n v e r te r C C I mu s t be e n e r g i ze d.
The o u tp u t B FT rel ay w i l l be opera ted by e i t h e r t h e ( A/0 )
d epend i n g on t h e t i me s e t t i n gs o f the re spec t i v e t i me rs a nd w h e t h e r t h e ( B/0 ) t i me r
i s en e r g i zed by t h e co n tact conv e rter ( CC I ) .
The IT u n i t has a n i s o l a te d no rmal l y- open co n tact ( IT I ) a nd a no th e r n o n - i s ol a ted
n o rma l l y-open co n tact ( IT 2 ) co n n ected from the i np u t ( B FI 6 2X, 6 2 Y ) termi na l to an
i n t e rn a l l u g ( l l A ) .
co n n ect i n g termi na l ( l i) to +DC, a s e a l - i n fea t u re ca n be obta i n ed.
w i l l no l o n g e r be i s o l a te d.
GEK-45464
Th i s l a tter co n t act, a s p rev i o u sl y descri bed, can
o u tput con tact,
T h e s i gnal from CCl s upe rv i s e s t h e A/0 t i me r i n o n e o f
i f e i t h e r t h e l ev e l
Howe v e r, IT1 w i l l no l on g e r by i sol a ted.
The B/0 t i me r i s i n depende n t l y a dju s tabl e o v e r
W i th t h e IN/OUT l i nk i n t h e I N po s i t i on, t h e B/0
By i n t e rnal l y co n n ect i n g ( liA) to te rm i n a l ( 11 ) a n d exte rna l l y
One co n tact h a s a commo n po i n t
a nd a co n tact con v e rter
is act i va ted by t h e con tact
The t i mer w i l l re s e t o n l y i f bo th
de tector o r CCl
The IT 2 co n tacts a re con n ected
8
( CCl ) ha s be en
I f t h e l i nk i s
Fo r th i s case, t h e A/0
re s e t s o r th e co n tact
By con n ect i n g
o r the ( B/0 ) t i mer,
Howev er, IT I
The
By
.-,