
rated medium voltage fuses for the protection of trans-
formers, potential transformers, feeders, and motor circuits.
Single, double, and triple barrel designs are available to
cover a wide range of current, voltage, and interrupting
ratings. Conventional ferrule type, clip lock, and bolt-in
mounting configurations are now available for virtually any
application. Hermetically sealed fuses for use in hazardous
environments are also offered.
additional fuse ratings or custom mounting configurations.
Call 1-800-227-0029.
Protection
Protection
Protection
used interchangeably by many people to describe fuses
operating above 600 volts. Technically speaking, "medium
voltage" fuses are those intended for the voltage range from
2,400 to 38,000 VAC. "High voltage fuses are for circuits
carrying voltages greater than 38,000 VAC.
and can be used to protect against low and high values of
fault current. "R" rated fuses are designed for back-up pro-
tection. They must be used in series with other devices, such
as motor overload relays, in order to achieve both overload
and short circuit protection.
protection in the same sense as fuses rated 600 volts or
less. Medium voltage fuse current ratings do not have the
same meanings as the ampere ratings of low voltage fuses.
rupt low value overcurrents, especially those between 100%
and 200% of the fuse's continuous current rating. They are
designed to carry their rated current without exceeding the
temperature rise permitted by NEMA and ANSI standards.
Application section of the POWR-GARD Products
catalog (PF101).
rated fuses are equipped with
a mechanical indicator or
striker pin that protrudes
through the fuse cap upon
operation of the fuse. This
provides visual identification
of a blown fuse and can be
used as a trigger for external
devices.

medium voltage motors, motor controllers and associated
circuitry. These components have limited ability to absorb the
energy of large short circuit currents. Medium voltage motor
controllers contain overload relays which provide both over-
load protection and locked rotor protection to the motor. The
controllers are also intended to interrupt low value short cir-
cuits within the capability of the motor controller. This pro-
tects the medium voltage fuse from sustained overcurrents
which are less than their minimum interrupting rating.
require that they operate within 15-35 seconds when sub-
jected to an rms current 100 times the "R" rating. For exam-
ple, a fuse with a 2R rating will open within 15 to 35 seconds
on an applied current of 2 x 100 = 200 amperes.
100-3R-1C-2.75
130-4R-1C-2.75
150-5R-1C-2.75
170-6R-1C-2.75
200-9R-1C-2.75
230-12R-1C-2.75
450-24R-2C-2.75
LCK 3R
LCK 4R
LCK 5R
LCK 6R
LCK 9R
LCK 12R
LCK 24R
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
250
340
390
500
760
1950
80,000
80,000
80,000
80,000
80,000
80,000
80,000
1
1
1
1
1
1
2
(add "S" suffix to part number)
Feature*
to part number

100-3R-1C-5.5
130-4R-1C-5.5
150-5R-1C-5.5
170-6R-1C-5.5
200-9R-1C-5.5
230-12R-1C-5.5
450-24R-2C-5.5
480-26R-2C-5.5
550-30R-2C-5.5
600-32R-2C-5.5
650-36R-2C-5.5
600-32R-3C-5.5
650-36R-3C-5.5
LCL 3R
LCL 4R
LCL 5R
LCL 6R
LCL 9R
LCL 24R
--
--
--
--
3R
4R
5R
6R
9R
24R
26R
30R
32R
36R
32R
36R
130
150
170
200
230
450
480
550
600
650
600
650
250
340
390
500
760
1950
2100
2400
2600
2900
2600
2900
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
4
4
4
4
4
4
5
5
5
5
5
6
6
100-3R-1C-5.5X
130-4R-1C-5.5X
150-5R-1C-5.5X
170-6R-1C-5.5X
200-9R-1C-5.5X
230-12R-1C-5.5X
450-24R-2C-5.5X
--
--
--
--
--
--
--
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
250
340
390
500
760
1950
80,000
80,000
80,000
80,000
80,000
80,000
80,000
4
4
4
4
4
4
5
100-3R-1C-8.25
130-4R-1C-8.25
150-5R-1C-8.25
170-6R-1C-8.25
200-9R-1C-8.25
230-12R-1C-8.25
450-24R-2C-8.25
--
--
--
--
--
--
--
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
225
330
440
500
740
955
1910
80,000
80,000
80,000
80,000
80,000
80,000
80,000
4
4
4
4
4
4
5

1.38" Apart
130-4R-1IB-2.75
150-5R-1IB-2.75
170-6R-1IB-2.75
200-9R-1IB-2.75
230-12R-1IB-2.75
450-24R-2IB-2.75
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
250
340
390
500
760
1950
80,000
80,000
80,000
80,000
80,000
80,000
80,000
9
9
9
9
9
9
10
130-4R-1B-2.75
150-5R-1B-2.75
170-6R-1B-2.75
200-9R-1B-2.75
230-12R-1B-2.75
450-24R-2B-2.75
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
250
240
390
500
760
1950
80,000
80,000
80,000
80,000
80,000
80,000
80,000
7
7
7
7
7
7
8
available in several bolt-in mounting configurations. Contact
factory for custom configurations

100-3R-1BI-5.5
130-4R-1BI-5.5
150-5R-1BI-5.5
170-6R-1BI-5.5
200-9R-1BI-5.5
230-12R-1BI-5.5
450-24R-2BI-5.5
480-26R-2BI-5.5
550-30R-2BI-5.5
600-32R-2BI-5.5
650-36R-2BI-5.5
600-32R-3BI-5.5
650-36R-3BI-5.5
700-38R-3BI-5.5
3R
4R
5R
6R
9R
24R
26R
30R
32R
36R
32R
36R
38R
130
150
170
200
230
450
480
550
600
650
600
650
700
250
340
390
500
760
1950
2200
2400
2650
2900
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
11
11
11
11
11
11
12
12
12
12
12
13
13
13
130-4R-1BI-8.25
150-5R-1BI-8.25
170-6R-1BI-8.25
200-9R-1BI-8.25
230-12R-1BI-8.25
450-24R-2BI-8.25
3R
4R
5R
6R
9R
24R
130
150
170
200
230
450
225
330
400
500
740
955
1910
80,000
80,000
80,000
80,000
80,000
80,000
80,000
11
11
11
11
11
11
12
130-4R-1B-5.5
150-5R-1B-5.5
170-6R-1B-5.5
200-9R-1B-5.5
230-12R-1B-5.5
450-24R-2B-5.5
550-30R-2B-5.5
600-32R-2B-5.5
650-36R-2B-5.5
3R
4R
5R
6R
9R
24R
30R
32R
36R
130
150
170
200
230
450
550
600
650
250
340
390
500
760
1950
2400
2650
2900
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
7
7
7
7
7
7
8
8
8
8
100-3R-1IB-5.5
130-4R-1IB-5.5
150-5R-1IB-5.5
170-6R-1IB-5.5
200-9R-1IB-5.5
230-12R-1IB-5.5
450-24R-2IB-5.5
550-30R-2IB-5.5
600-32R-2IB-5.5
650-36R-2IB-5.5
3R
4R
5R
6R
9R
24R
30R
32R
36R
130
150
170
200
230
450
550
600
650
250
340
390
500
760
1950
2400
2650
2900
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
9
9
9
9
9
9
10
10
10
10