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F i g . 1
( 804346 6 )
F i g . 2
( 8043467 )
F i g . 3 . . . . {8043468 )
F i g . 4
( 8043469 )
F i g . 5
( 0257A61 7 4 )
F i g . 6
( 0257 A6 189- 1 )
F i g . 7
( 0257 A6 1 9 0 )
F i g . 7a
( 0275A382 0 )
Fi g . 7 b
( 0275A4443 )
Fi g . 8
( 0257 A6 1 9 3 )
F i g . 9
( 0257 A6 1 9 4 )
Fi g . 9a
( 0275A44 3 9 )
Fi g . 1 0
( 04 18A0932- 1 )
F i g . 1 1
( 0418A0963 )
F i g . 1 2
( K- 6154284- 2 )
F i g . 1 3
( 0888B0269- 3 )
F i g . 14
( 0888B0270- 3 )
F i g . 15
( 0888B0274- 5 )
Fi g . 1 6
( 0285A666 3 )
( 0208A8695- 1 )
F i g . 1 7
F i g . 1 8
( 0208A8694- 2 )
F i g . 1 9
( 8023399 a nd
8027689 )
Fi g . 20
( K- 6077 069- 4 )
F i g . 2 1
( 80 1 2 1 06 )
F i g . 2 2
( 8025039 )
F i g . 23
( 0178A9036 )
Fi g . 24
( 0377A0 1 95- 2 )
F i g . 25
( 04 18A0970 )
F i g . 2 6
( 0178A9035 )
F i g . 2 7
(K- 62092 7 6- 3 )
GEK-49848A
LI ST OF I LLUSTRAT I ONS
Type JB C51M ( - ) Y 1 A Rel ay i n Case
Type JB C51M ( - ) Y1 A Rel ay Removed from Case ( Front V i ew )
Type JB C51M ( - ) Y 1 A Rel ay Removed from C a s e ( Rear V i ew )
Type JB C77M Rel ay Removed from Case ( Rear V i ew )
I nternal Connec ti o n s for JB C51M a n d JB C53M Rel ays ( Front
V i ew )
I nternal Connec t i o n s for JB C51M ( - ) Y 1 A Rel ay ( Front V i ew )
I nternal Connec t i o n s for JBC5 1 P a nd JBC53P Rel ays ( Fron t
V i ew )
I n ternal Con n ec t i o n s for JBC52M a nd JB C54M
I ntern a l Con n ec t i ons for JBC52P
I nternal Connec t i o n s for JBC77M Rel ay ( Fron t V i ew )
I ntern a l Conn ec t i o n s for JB C7 7 P Rel ay ( Front V i ew )
I ntern a l Connec t i ons for JB C78M
Extern a l Con n ec ti ons for Three S i n gl e Phase Type JBC Rel ays
for D i recti on a l Phase Faul t Protect i on of a S i n gl e
Transmi s s i on L i ne
External Connec t i o n s for Three S i ngl e Phase Type JBC Rel ays
w i t h Aux i l i a ry Tel ephone Type Rel ays for D i rect i on a l Phase
Faul t Pro tect i on o f a S i ngl e Transmi s s i on L i ne
D i rec t i onal U n i t T i me- curre n t Chara c te r i s t i c for Vol tage
Appl i ed i n Pha s e wi t h Current
Ti me- curre n t Chara c te r i s t i c o f I nv e rse T i me Ove rcurre n t
U n i t
Ti me-curre n t Chara c teri s t i c o f V e ry I nverse T i me
Ov ercurren t U n i t
T i me-curren t C haracte r i s t i c o f Extremel y I nv e rs e T i me
Ov ercurren t U n i t
Repre sentati ve T i me- curre n t C h a ra c te r i s t i c o f D i rec t i on a l l y
Control l ed I n stantaneous Overcurren t U n i t
Ti me-curren t C haracteri s t i c o f the H i - Se i smi c I ns ta n ta neous
Un i t
Tra ns i en t Overreach Characte r i st i c s o f the H i - Se i smi c
I n sta ntaneous U n i t
Low Gra d i ent Contact Ass embl y for the D i rec t i onal
U n i t
Barrel Contac t Assembl y for the D i recti onal a nd the
I n stantaneous Ov ercurre n t U n i ts
Typ i c a l Tel ephone Rel ay Type Aux i l i a ry U n i t Used i n JBC
Rel ays
Cros s Sec t i on o f Drawout Case S howi n g Pos i ti on o f Aux i l i a ry
Brush
Test Connec t i on s for Checki ng P i ckup a nd Ope ra t i n g T i me o f
the T i me Ove rcurren t Un i t
Tes t Connec t i on s fo r C hecki n g Pol a r i ty of the External
W i r i n g of the D i rec t i o n a l U n i t
Test Connec t i on s for C hecki ng Pol a r i ty o f the D i rec t i onal
Un i t I nterna l Wi r i n g
Tes t Connec t i on s for C hec ki n g P i ckup o f D i rec t i onal l y
Contro l l ed I O C Un i t
Outl i ne a nd Panel Dr i l l i ng D i mens i on s for J B C Rel ays
28
( Fron t V i ew )
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