SECTION 9-Fused Breakers (Cont.)
1 .
Spe cial
2 5 00A
Fu s e
4 .
Upp e r Bar r i e r
2 .
D i s c onne ct Key
5 .
Primary Di s c onne ct
3 .
Heat Sink
FIG. 53 AK RU 50 WITH SPECIAL
2500 AMP FUSE
CAUTION :
WHEN REPLACING THE FUSE IN THE
LEFT POLE (FRONT VIEW) OF THE BREA KER,
NO TE PA R TI C ULA R L Y THA T THIS FUSE IS
MOUNTED DIFFERENTL Y THAN THE O THER TWO
FUSES. A S SHO WN IN FIG . 54, FOR THIS PHASE
THE FUSE IS ROTA TED
1 80
DEGREES A B O U T
I TS A XIS S O THA T I TS INBOA R D TA N G IS
POSI TIONED
THE B REAKER S TU D .
THIS TANG I S OFFSET WITH RESPECT TO THE
OPPOSITE END SO THA T ROTA TING THE FUSE
DOES NOT AL TER THE POSITION OF THE PRI
MAR Y DISCONNECT.
0
FRONT OF BREAKER
FUSE TANGS
BREAKER
STUD
POSITIONED ON TOP
OF BREAKER STUD
l TANG BOLT·
HOLES
I N USE
L
2500A. FUSE
CAT. NO.
G F9F2500 A K
G G
FOR THIS POLE ONLY,
FUSE I S ROTATED 1 80'
TO POSITION TANG
BENEATH BREAKER STUD
P R I MARY DISCONN ECT ASSEM BLY (SEE F I G . 53)
MOUNTS D I RECTLY O N OUTBOA R D FUSE TANG
FIG. 54
AKRU 50-2500A FUSE TANG POSITIONS
TABLE 6
FUSES FOR AKRU BREAKERS
NEMA
Gould Shawmut
Fuse
Breaker
Cat. Nos.
Class
Type
Ampere
600V
Rating
60 Hz
30
50
Fuse
Limiter
-
300*
A4J 300
-
-
350*
A4J 350
-
J
-
400*
A4J 400
-
450
A4J 450
-
500
A4J 500
-
600
A4J 600
-
800
A4BY 800
A4BX 800
L
1 000
A4BY 1 000BG
A4BX 1 000BG
1 200
A4BY 1 200BG
A4BX 1 200BG
1 600
A4BY 1 600BG
A4BX 1 600BG
-
2000
A4BY 2000BG
A4BX 2000BG
Special
-
�
2500
-
A4BX 2500GE
•
Mounting adapter required - see Fig.
52
42
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