Motor Protection
Amp-Trap
®
and 9F60 Series
2.4kV, 2.54kV, 4.8kV, 5.08kV and 7.2kV
Ferrule mounted fuses:
Mersen R-Rated fuses are current-limiting, high interrupting rating fuses intended
for the short circuit protection of medium voltage motors and motor controllers.
R-Rated fuses are back-up fuses that 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. These fuses come with a 3
(size D) or 4 (size E) inch diameter barrels with ferrules and are mounted in spring
reinforced clips.
Features/Benefits:
•
Ferrule mounting for standard clips and interchangeability with other brands
of fuses.
•
Current-limiting for superior equipment protection.
•
Metal embossed catalog number and manufacturing date for lasting identification.
•
Hookeye for non load-break isolation by hookstick
•
On the 4.8kV an optional hookeye mounted in the factory is available.
•
On all other 3” barrel if a hookeye is required, use the operating eye
9F61AAW612. (See page E58)
•
Blown-fuse indicator to give positive identification of open fuse.
•
Amp trap: 3” Barrel 2 lb tripped force - 0.50 Inch
•
9F60: 0.125 lb tripped force – 0.20 Inch
Ratings:
Highlights:
•
R-Rated
•
UL recognized
Applications:
•
Short circuit protection of medium
voltage motors and motor
controllers.
Amp-Trap
A240R
Volts
: 2.4kV AC
Amps
: 1 to 36R
IR
: 65kA Sym
A480R
Volts
: 4.8kV AC
Amps
: 2 to 36R
IR
: 50kA Sym
A072F
Volts
: 7.2kV AC
Amps
: 2 to 24R
IR
: 50kA Sym
9F60 SERIES TYPE EJ-2
9F60
Volts
: 2.54kV AC
: 5.08kV ac
Amps
: 2 to 36R
IR
: 50kA Sym
Definitions:
R-Rating:
R-Rated fuses are back-up fuses that operate as follows (Per ANSI
C37.46-2000): An R-Rated fuse will melt in the range of 15 to 35 seconds at a value of
current equal to 100 times the “R” rating.
Back-up Current-Limiting Fuses:
A back-up current-limiting fuse is a fuse that can
interrupt any current between its rated minimum interrupting current and its maximum
interrupting current. Back-up fuses are not designed or intended to open under
overload conditions.
Continuous Ampere Rating at 40°C:
The continuous amp rating defines the thermal
capability of the fuse per ANSI C37.46 and should not be the sole factor in fuse
selection.
Approvals:
•
Amp-Trap: UL File E93367
•
9F60: UL File E191980
E21
E
•
The Amp-Trap and 9F60 R-Rated fuses are UL Recognized.
Motor Protection
Amp-Trap
®
and 9F60 Series
2.4kV R-Rated Amp-Trap Series
7.5” (191 mm) Clip Centers – Barrel diameter size D (3”)
Minimum
Interrupting
Rating
RMS Amp
100
170
250
340
420
500
760
1000
1500
2000
2900
2
3
B
C
1
A
Yes
10.88 (276)
65kA at 2.6kV
65kA at 2.6kV
Dimension
Fig.
Indicating
L
Inches
(mm)
Recognition
Max IR RMS Sym
1 Phase interrupting rating
UL Component
Max Voltage Tested
Max IR RMS Sym
Continuous
Catalog No.
Size
Amp rating
at 40°C
A240R1R
A240R2R
A240R3R
A240R4R
A240R5R
A240R6R
A240R9R
A240R12R
A240R18R
A240R24R
A240R36R
1R
2R
3R
4R
5R
6R
9R
12R
18R
24R
36R**
35
70
100
130
150
170
200
230
390
450
650
No
of
Barrels
** Not recommended for use in fuse clips which grasp only one barrel.
2.4kV / 2.54kV Ferrule mounted fuses:
Indicator Flush with Surface
2 Lb. Force (Tripped)
0.5
(12.7)
3
(76)
3.312
(84.1)
0.5
(12.7)
3.312
(84.1)
3.312
(84.1)
0.5
.5 (12.7)
(12.7)
L
L
L
3
(76)
3
(76)
3
(76)
3
(76)
3
(76)
3
(76)
Figure A
Figure B
Figure C
E22
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