GE SBC23A Instructions Manual page 5

BUS AND
B REAKER FIG. #
ARRANGEMENT
S i ngl e Bus­
S i ngl e Bkr. 5
Doubl e B u s -
6
Doubl e Bkr.
Doubl e B u s -
6
Doubl e Bkr.
B reake r-&-
1 7
a - Ha f
B reake r-&-
7
a - Ha l f
B reake r-&-
7
a - Ha l f
R i ng B u s
8
a s soci a ted w i th bre ake r #1.
l i ne A fo r a fa u l t a t Fl .
prov i d e the contact i n i t i a t i on.
SBC re l ay ope ra tes and th e B FT contact t r i ps t h e fo l l owi ng:
and B FT #2 tr i ps B reake r #6.
breake rs #7 and #8 and bl ocks recl o s i ng o f #2 and #6.
GEK-45464
TABLE II
CURRENT CONTACT
FAULT FAILED FROM
LOC. B REAKE R AS SOC.
B REAKER
F1 2 2
F1
o r 3 3
F2
F1
o r 4 4
F3
Fl
o r 4 4
F3
F1
o r 5
5
F2
F2
o r 6
6
F4
F1
o r 1 1
F2
The contact i n i t i a t i on i s from t h e pro tect i v e re l ays o f
Fo r a fa u l t a t F2, t h e pro tec t i ve r e l ays o f l i ne B
As suming bre ake r #1 fa i l s fo r a fa u l t a t Fl, the
B FT #3 tr i ps t h e l ocko u t rel ay t h a t trans fe r tr i ps
B FT
INITIATION CONTACT
FROM #1 TRIPS #2 TRIPS #3 TRIPS
B u s
L i ne B
Lockou t
Rel ay
No rth
L i ne B B u s
o r Lockout
No r th B u s Rel ay
S o u th
L i ne B
B u s
o r Locko u t
Sou th B u s Rel ay
No rth
B u s
L i ne A
o r Locko u t
No rth B u s Rel ay
L i ne A
o r B rkr 4
L i ne B
S o u th
L i ne B B u s
o r Lockou t
Sou th B u s Rel ay
L i ne A
o r
B rkr 2
L i ne B
B FT #1 t r i ps breake r #2
5
B FT B FT
CONTACT CONTACT
-
Lock-o u t rel ay
t h a t trans fe r
B rkr 4 t r i ps l i ne B &
bl ocks recl o s ing
of B rkr. 4
Lock-ou t rel ay
t h a t trans fe r
t r i ps l i ne B &
B rkr 3
bl ocks recl o s ing
of B rkr. 3
Lock-o u t re l ay
that trans fe r
B rkr 5 t r i ps B rkr. 10 &
bl ocks recl o s ing
of B rkr. 5
Lock-ou t rel ay
t h a t trans fe r
B rkr 6
tr i ps B rkrs.lO
11 & bl ocks re­
cl o s i ng of 4 & 6
Lock-ou t re l ay
t h a t trans fe r
B rkr 5
t r i ps B rkr. 11 &
bl ocks recl o s ing
of B rkr. 5
Lock- o u t rel ay
t h a t trans fe r
B rkr 6 t r i ps B rkrs. 7
& 8 & bl ocks re­
cl o s ing of 2 & 6