Medium voltage fuses
Medium voltage fuses
American Fuses
R-Rated
2.4kV - 4.8kV/7.2kV - A 240R/A 480R/A 072F/A 072B
R-RATED MOTOR STARTER FUSES
Amp-trap
®
R-rated fuses are current-limiting, high inter-
rupting rating fuses intended for the short-circuit protec-
tion of medium voltage motors and motor controllers. R-
rated fuses have a minimum interrupting rating and must
be coordinated with overload relays in combination
motor starters. The motor starter manufacturer generally
specifies the R-rated fuse size. Amp-trap R-rated fuses
are-rated 2R to 36R, at 2.4, 4.8, and 7.2kV. 4.8 and 7.2kV
fuses are UL Recognized. The 4.8kV (A480R) is available
with hookeye tab. The 7.2kV (A072F) series has the same
dimensions as the 4.8kV (A480R), allowing smaller 7.2kV
equipment or 4.8kV upgrades. The A072B is a bolt-in
7.2kV fuse.
Features /Benefits
•
Ferrule mounting
for standard clips and
interchangeability with other brands of fuses.
•
7.2kV
series has the same dimensions as
4.8kV fuses, allowing compact, higher
voltage-rated equipment designs.
•
7,2kV
bolt-in design for improved
design flexibility.
• Optional hookeye on 4.8 kV for non
load-break isolation by hookstick.
Back-up type Current-Limiting Fuse:
A current limiting fuse which can interrupt any current
between it’s rated minimum interrupting current and it’s
maximum interrupting current. Backup fuses are not
designed or intended to open under overload conditions.
Highlights
• R-Rated
• UL Recognized in 4.8 and 7,2 kV ratings
Ratings
A240R
AC:
2R to 36R
2750V, 45kA I.R. Sym.
Applications
Short circuit protection of medium voltage motors and
motor controllers
Approvals
• Ferraz Shawmut certified
- A240R @ 2750V, 45kA Sym.
• UL Recognized Component
- A480R @ 5080V, 50kA, Sym.
- A072F @ 7200V, 50kA, Sym.
- A072B @ 7200V, 50kA, Sym.
• UL file # E93367
A480R
AC:
2R to 36R
5500V, 63kA I.R. Sym.
A072F - A072B
AC:
2R to 24R
7200V, 50kA I.R. Sym.
Spring-reinforced clips
• 228-700-530 (one pair of clips)For 3” diameter,
2 barrels max.
MV
57
12/04
Medium voltage fuses
Medium voltage fuses
American Fuses
R-Rated
2.4kV - 4.8kV/7.2kV - A 240R/A 480R/A 072F/A 072B
A240R 2.4kV Ferrule Style
Indicator flush with surface
2 lb. Force (Tripped)
(12,7)
(76)
(84,1)
(12,7)
(76)
(84,1) (84,1)
(12,7)
(76)
3
(76)
FIGURE A
3
(76)
3
(76)
3
(76)
3
(76)
3
(76)
FIGURE B
FIGURE C
Catalog and Reference Numbers, Ratings, Dimensions, 2.4kV
Catalog
Number
Reference
Number
Size
Standard
Continous
Ampere
Rating
at 40˚
Minimum
Interrupting
Rating
Rms Amperes
Fig.
Dim.
L
Maximum
Tested
RMS
RMS
Asym
Sym
A240R
A
B
C
A240R2R J201557
2R
A240R3R F211812
3R
A240R4R E212846
4R
A240R6R E213858
6R
A240R9R P214373
9R
A24OR12R R219504 12R
A24OR18R N221962 18R
A240R24R L223225 24R
A240R36R W211297 36R**
70
100
130
170
200
230
390
450
650
10-7/8
(276mm)
170
250
340
500
760
1000
1500
1950
2900
70kA
@
2750V
45kA
@
2750V
* This rating defines the fuse’s long-term thermal capability per ANSI C37 46-1981 and should not be
the sole factor for selecting a specific R-rating.
** Not recommended for use in fuse clips which grasp only one barrel.
12/04
MV
58
Medium voltage fuses
Medium voltage fuses
American Fuses
R-Rated
2.4kV - 4.8kV/7.2kV - A 240R/A 480R/A 072F/A 072B
A480R 4.8kV Ferrule Style
Indicator flush with surface
2 lb. Force (Tripped)
(12,7)
(12,7)
(76)
(84,1)
(84,1) (84,1)
(76)
Indicator flush
(Tripped position)
(76)
(8)
3
(76)
FIGURE A
3
(76)
3
(76)
3
(76)
3
(76)
3
(76)
(25.4)
FIGURE B
FIGURE C
Hookeye illustration
Catalog and Reference Numbers, Ratings, Dimensions, 4.8kV
Fig.
Catalog
Number
Reference
Number
Size
Continous
Ampere
Rating
at 40˚
Dim.
L
Minimum
Interrupting
Rating
Rms Amperes
1 Phase Interrupting Rating
UL Component
Recognition
RMS
RMS
Asym
Sym
Maximum
Tested
RMS
RMS
Asym
Sym
Standard
A480R-1
A480R2R-1
A480R3R-1
A480R4R-1
A480R5R-1
A480R6R-1
A480R9R-1
A480R12R-1
A480R18R-1
A480R24R-1
A480R36R-1
A480R2R-1HE
A480R3R-1HE
A480R4R-1HE
A480R5R-1HE
A480R6R-1HE
A480R9R-1HE
A480R12R-1HE
A480R18R-1HE
A480R24R-1HE
P221963
K201558
G211813
Q213362
Q214374
W215897
N214878
Z216406
H218461
C201045
X222706
S203428
R212328
F213859
P214879
A216407
S215388
G216919
A218983
a2R
3R
4R
5R
6R
9R
12R
18R
24R
36R**
2R
3R
4R
5R
6R
9R
12R
18R
24R
70
100
130
150
170
200
230
390
450
650
70
100
130
150
170
200
230
390
450
190
225
330
400
500
740
955
1440
1910
2810
190
225
330
400
500
740
955
1440
1910
A
15-7/8
(403mm)
80kA
@
5080V
50kA
@
5080V
100kA
@
5500V
63kA
@
5500V
B
C
A480R-1HE with hookeye
A
16-1/8
(410mm)
80kA
@
5080V
50kA
@
5080V
100kA
@
5500V
63kA
@
5500V
B
* This rating defines the fuse’s long-term thermal capability per ANSI C37 46-1981 and should not be the sole factor for selecting a
specific R-rating.
** Not recommended for use in fuse clips which grasp only one barrel.
MV
61
12/04
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