Description - GE SBC23A Instructions Manual

The type SB C23A,
d e s i gned to prov i d e sys tem backup pro tec t i o n i n t h e e v e n t o f a c i rc u i t breaker
fa i l ure. The se re l ays mee t the majo r requ i reme n ts o f a breake r- fa i
s c h eme - hi g h s ecuri ty and c apabi l i ty fo r fa s t cl e a r i n g t i me s.
appl i cabl e w i th any o f the sev e ra l bu s/bre ake r a r ran geme n ts i n gen e ra l u se, and over
a w i d e ra nge of fau l t-cu rre n t cond i t i o ns wh i c h may be encou n t e re d.
rel ay i s requ i red fo r each breake r.
The S B C rel ays cov e red by the s e i n struct i o n s a re pa cka ged i n the M2D d rawo u t ca se,
the o u tl i n e a nd mo u n t i n g d i men s i o ns fo r wh i c h a re s hown i n F i g u re 1.
i nc l u de the fo l l ow i n g bas i c c ompo n e n ts and fea tu re s:
1.
Inpu t prov i s i o ns fo r a c o n ta c t i n i t i a t i o n ( B FI, 6 2X, 6 2 Y ) t h a t a c t i vates t h e
power s uppl y a n d th e rel ay.
2 .
A fa s t re s e t c u rre n t d e tector w i th two i nd epe n d e n t l y-adju s tabl e pi ckup s e t t i n g s
fo r p h a s e ( I A , .I s , Ic ) a nd g r o u n d ( 3Io) curren ts.
3. An adjus tabl e
co rrectl y.
4. T h re e e l ec tr i c a l l y-s epa ra te c o n ta c t o u tput c i rcu i t s
backup breake rs. Two of these c i rc u i ts have e l ec tromec h a n i ca l s e r i e s targe ts.
5. An e l ec t r i c a l l y-s epa ra te
ou tpu t o f the l ev e l d e tec to r.
mod e l s, t h e I T c o n ta c t i s
6 . A regu l a ted powe r supp l y.
7 . S u rge s uppre s s i on o n a l l A C a nd D C i nput c i rc u i t s.
These instructions do not purport to cover all details or variations ia equipment nor to provide for
every possible contingency to be met in connection with installation,
further information be desired or should parti cular problems arise which are not covered sufficiently for
the purchaser's purposes,
To the extent required the products described herein meet applicable AISI,
but no such assurance i s given with respect to local codes and ordinances because they vary greatly.
GEK-45464
STATIC BREAKER BACKUP RELAYS
TYPES SBC23A, SBC23B, SBC23C
INTRODUCTION
SB C23B, and SB C2 3 C

DESCRIPTION

t i me r to prov i d e
i n s ta nta neous
I f s ea l -i n i s u s ed o n the S B C23B a nd S B C2 3 C
i s o l a te d.
not
the matter should be referred to the General Electric Co�any.
re l ays a re s ta t i c
t i me fo r the pr i ma ry bre ake r
( IT u n i t ) con ta c t,
oper.tion or maintenance.
IEEE and HE� standards;
3
breake r-fa i l u re rel ays
1
u re backup
These re l ays a re
One type S B C
The rel ays
to ope ra te
( B FT) fo r t r i pp i n g
ope ra ted by th e
Should
the