Medium Voltage Fuses
64 www.littelfuse.com
Medium Voltage Fuses
© 2005 Littelfuse • POWR-GARD™ Products Catalog
Medium Voltage Fuses
2,400 - 38,000 VAC • Current-Limiting
Littelfuse now offers a complete selection of “E” and “R” rated
medium voltage fuses for the protection of transformers, 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.
Contact the factory or your local Littelfuse representative for additional
fuse ratings or custom mounting configurations.
24 Hour Emergency Service is available. Call 847 824 1188.
Applications
Power Transformer Protection
Potential Transformer Protection
Motor Controller Back-up Protection
Fused Switches
Feeder Circuits
General Information
The terms “Medium Voltage” and “High Voltage” have been 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.
“E” rated fuses are considered to be general purpose fuses and can be
used to protect against low and high values of fault current. “R” rated
fuses are designed for back-up protection. They must be used in series
with other devices such as motor overload relays in order to achieve
both overload and short-circuit protection.
Medium voltage fuses are not intended to provide overload 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.
All medium voltage fuses are limited in their ability to interrupt 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.
Additional application data can be found in the Fuse Application section
of this catalog.
Current-limiting “E” and “R” 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.
Note: Extension distance 1/2” min; extension
force 2lb. min
Bolt-in Mount Fuses
Medium Voltage Fuses
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Medium Voltage Fuses
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Features
“R” rated fuses provide required short-circuit protection for 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 overload protection and locked rotor
protection to the motor. The controllers are also intended to interrupt
low value short-circuits within the capability of the motor controller. This
protects the medium voltage fuse from sustained overcurrents which
are less than their minimum interrupting rating.
NEMA Standards for “R” rated medium voltage power fuses require
they operate within 15-35 seconds when subjected to an rms current
100 times the “R” rating. For example, a fuse with a 2R rating will open
within 15 to 35 seconds on an applied current of 2 x 100 = 200 amperes.
Part Number System
130-4R-1C-5.5
R Rated Medium Voltage Fuses
Current-Limiting
3"DIA
Dim.A
Clip
Center
6.38"
Dim.B
9.75"
A
D DD DDD
Figure 1 Figure 2 Figure 3
Hookeye Feature*
* For hookeye attach-
ment; add “W” suffix
to part number
Max Voltage (KV)
Style (C-Cartridge)
No. of Barrels
Rating (size)
Continuous Current
Add “w” suffix to part number for hookeye attachment.
Characteristics
Voltage Rating: 2,400 volts – 8,250 volts
Current Range: 2R – 36R
Options
• Hermitically sealed for use in hazardous locations
(add “S” suffix to part number)
• Bolt-in mounting configurations
R
Rated
Catalog
Number
Old
Catalog
Number
Size
Maximum
Continuous Current
@ 40 deg C.
Dim. A
(inches)
Dim. B
(inches)
Min. Interrupting
Rating RMS Amps
Max Interrupting
Rating RMS Asym
Figure
Number
2.75 KV
70-2R-1C-2.75 LCK 2R 2R 70 7" 10.875" 170 80,000 1
100-3R-1C-2.75 LCK 3R 3R 100 7" 10.875" 250 80,000 1
130-4R-1C-2.75 LCK 4R 4R 130 7" 10.875" 340 80,000 1
150-5R-1C-2.75 LCK 5R 5R 150 7" 10.875" 390 80,000 1
170-6R-1C-2.75 LCK 6R 6R 170 7" 10.875" 500 80,000 1
200-9R-1C-2.75 LCK 9R 9R 200 7" 10.875" 760 80,000 1
230-12R-1C-2.75 LCK 12R 12R 230 7" 10.875" 1000 80,000 1
390-18R-2C-2.75 LCK 18R 18R 390 7" 10.875" 1500 80,000 2
450-24R-2C-2.75 LCK 24R 24R 450 7" 10.875" 1950 80,000 2
Medium Voltage Fuses
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Medium Voltage Fuses
© 2005 Littelfuse • POWR-GARD™ Products Catalog
R Rated Medium Voltage Fuses
Current-Limiting
3"DIA
Dim.A
(Clip
Center)
6.38"
Dim.B
9.75"
AA
D DD DDD
R
Rated
Catalog
Number
Old
Catalog
Number
Size
Maximum
Continuous Current
@ 40 Degrees C°
Dim. A
(inches)
Dim. B
(inches)
Min. Interrupting
Rating RMS Amps
Max Interrupting
Rating RMS (Asym)
Figure
Number
5.5 KV
70-2R-1C-5.5 LCL 2R 2R 70 12" 15.875" 170 80,000 4
100-3R-1C-5.5 LCL 3R 3R 100 12" 15.875" 250 80,000 4
130-4R-1C-5.5 LCL 4R 4R 130 12" 15.875" 340 80,000 4
150-5R-1C-5.5 LCL 5R 5R 150 12" 15.875" 390 80,000 4
170-6R-1C-5.5 LCL 6R 6R 170 12" 15.875" 500 80,000 4
200-9R-1C-5.5 LCL 9R 9R 200 12" 15.875" 760 80,000 4
230-12R-1C-5.5 LCL 12R 12R 230 12" 15.875" 1000 80,000 4
390-18R-2C-5.5 LCL 18R 18R 390 12" 15.875" 1500 80,000 5
450-24R-2C-5.5 LCL 24R 24R 450 12" 15.875" 1950 80,000 5
480-26R-2C-5.5 — 26R 480 12" 15.875" 2100 80,000 5
550-30R-2C-5.5 — 30R 550 12" 15.875" 2400 80,000 5
600-32R-2C-5.5 — 32R 600 12" 15.875" 2600 80,000 5
650-36R-2C-5.5 — 36R 650 12" 15.875" 2900 80,000 5
550-30R-3C-5.5 — 30R 550 12" 15.875" 2400 80,000 6
600-32R-3C-5.5 — 32R 600 12" 15.875" 2600 80,000 6
650-36R-3C-5.5 LCL 36R 36R 650 12" 15.875" 2900 80,000 6
5.5 KV
14”Clip Centers
70-2R-1C-5.5X —2R 70 14" 17.875" 170 80,000 4
100-3R-1C-5.5X —3R 100 14" 17.875" 250 80,000 4
130-4R-1C-5.5X —4R 130 14" 17.875" 340 80,000 4
150-5R-1C-5.5X —5R 150 14" 17.875" 390 80,000 4
170-6R-1C-5.5X —6R 170 14" 17.875" 500 80,000 4
200-9R-1C-5.5X —9R 200 14" 17.875" 760 80,000 4
230-12R-1C-5.5X —12R 230 14" 17.875" 1000 80,000 4
390-18R-2C-5.5X —18R 390 14" 17.875" 1500 80,000 5
450-24R-2C-5.5X —24R 450 14" 17.875" 1950 80,000 5
550-30R-2C-5.5X —30R 550 14” 17.875” 2400 80,000 5
R
Rated
Catalog
Number
Old
Catalog
Number
Size
Maximum
Continuous Current
@ 40 Degrees C°
Dim. A
(inches)
Dim. B
(inches)
Min. Interrupting
Rating RMS Amps
Max Interrupting
Rating RMS (Asym)
Figure
Number
8.25 KV
70-2R-1C-8.25 — 2R 70 12" 15.875" 190 80,000 4
100-3R-1C-8.25 — 3R 100 12" 15.875" 225 80,000 4
130-4R-1C-8.25 — 4R 130 12" 15.875" 330 80,000 4
150-5R-1C-8.25 — 5R 150 12" 15.875" 440 80,000 4
170-6R-1C-8.25 — 6R 170 12" 15.875" 500 80,000 4
200-9R-1C-8.25 — 9R 200 12" 15.875" 740 80,000 4
230-12R-1C-8.25 — 12R 230 12" 15.875" 955 80,000 4
390-18R-2C-8.25 — 18R 390 12" 15.875" 1440 80,000 5
450-24R-2C-8.25 — 24R 450 12" 15.875" 1910 80,000 5
Add “w” suffix to part number for hookeye attachment.
Figure 4 Figure 5 Figure 6
Medium Voltage Fuses
67
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Medium Voltage Fuses
© 2005 Littelfuse • POWR-GARD™ Products Catalog
R Rated Medium Voltage Fuses
Current-Limiting
R
Rated
Catalog
Number
Old
Catalog
Number
Size
Maximum
Continuous Current
@ Degrees C°
Dim. A
(inches)
Dim. B
(inches)
Min. Interrupting
Rating RMS Amps
Max Interrupting
Rating RMS (Asym)
Figure
Number
2.75 KV
Bolt Mount “B”
70-2R-1B-2.75 —2R 70 4.6" 13" 170 80,000 7
00-3R-1B-2.75 —3R 100 4.6" 13" 250 80,000 7
30-4R-1B-2.75 —4R 130 4.6" 13" 240 80,000 7
150-5R-1B-2.75 —5R 150 4.6" 13" 390 80,000 7
170-6R-1B-2.75 —6R 170 4.6" 13" 500 80,000 7
200-9R-1B-2.75 —9R 200 4.6" 13" 760 80,000 7
230-12R-1B-2.75 —12R 230 4.6" 13" 1000 80,000 7
390-18R-2B-2.75 —18R 390 7.4" 13" 1500 80,000 8
450-24R-2B-2.75 —24R 450 7.4" 13" 1950 80,000 8
2.75 KV
Inverted Bolt “IB”
70-2R-1IB-2.75 —2R 70 — 13" 170 80,000 9
100-3R-1IB-2.75 —3R 100 — 13" 250 80,000 9
130-4R-1IB-2.75 —4R 130 — 13" 340 80,000 9
150-5R-1IB-2.75 —5R 150 — 13" 390 80,000 9
170-6R-1IB-2.75 —6R 170 — 13" 500 80,000 9
200-9R-1IB-2.75 —9R 200 — 13" 760 80,000 9
230-12R-1IB-2.75 —12R 230 — 13" 1000 80,000 9
390-18R-2IB-2.75 —18R 390 — 13" 1500 80,000 10
450-24R-2IB-2.75 —24R 450 — 13" 1950 80,000 10
Dim.B
Dim.ADim.A
(2) .34" X .660 Slots
1.38" Apart
3" Dia.
(2) .34" Holes
1.38" Apart
Indicator
Indicator
Dim.BDim.B
3" Dia. Indicator
Indicator
Bolt Mount “B” Inverted-Bolt “IB”
Figure 7 Figure 8 Figure 9 Figure 10
Littelfuse POWR-GARD™ medium voltage fuses are available in
several bolt-in mounting configurations. Contact factory for custom
configurations.
“B” Bolt mount
“BI” Bolt-In mount
“IB” Inverted-Bolt mount
Refer to illustrations for mounting dimensions.
Medium Voltage Fuses
68 www.littelfuse.com
Medium Voltage Fuses
© 2005 Littelfuse • POWR-GARD™ Products Catalog
R Rated Medium Voltage Fuses
Current-Limiting
R
Rated
Catalog
Number
Old
Catalog
Number
Size
Maximum
Continuous Current
@ 40˚ C.
Dim. A
(inches)
Dim. B
(inches)
Min. Interrupting
Rating RMS Amps
Max Interrupting
Rating RMS (Asym)
Figure
Number
5.5 KV
Bolt In Mount “BI”
70-2R-1BI-5.5 — 2R 70 3.6” 18" 170 80,000 11
100-3R-1BI-5.5 — 3R 100 3.6” 18" 250 80,000 11
130-4R-1BI-5.5 — 4R 130 3.6” 18" 340 80,000 11
150-5R-1BI-5.5 — 5R 150 3.6” 18" 390 80,000 11
170-6R-1BI-5.5 — 6R 170 3.6” 18" 500 80,000 11
200-9R-1BI-5.5 — 9R 200 3.6” 18" 760 80,000 11
230-12R-1BI-5.5 — 12R 230 3.6” 18" 1000 80,000 11
390-18R-2BI-5.5 — 18R 390 7.6” 18" 1500 80,000 12
450-24R-2BI-5.5 — 24R 450 7.6” 18" 1950 80,000 12
480-26R-2BI-5.5 — 26R 480 7.6” 18" 2200 80,000 12
550-30R-2BI-5.5 — 30R 550 7.6” 18" 2400 80,000 12
600-32R-2BI-5.5 — 32R 600 7.6” 18" 2650 80,000 12
650-36R-2BI-5.5 — 36R 650 7.6” 18" 2900 80,000 12
550-30R-3BI-5.5 — 30R 550 — 18" — 80,000 13
600-32R-3BI-5.5 — 32R 600 — 18" — 80,000 13
650-36R-3BI-5.5 — 36R 650 — 18" — 80,000 13
700-38R-3BI-5.5 — 38R 700 — 18" — 80,000 13
5.5 KV
Bolt Mount “B”
70-2R-1B-5.5 — 2R 70 4.6” 18" 170 80,000 7
100-3R-1B-5.5 — 3R 100 4.6” 18" 250 80,000 7
130-4R-1B-5.5 — 4R 130 4.6” 18" 340 80,000 7
150-5R-1B-5.5 — 5R 150 4.6” 18" 390 80,000 7
170-6R-1B-5.5 — 6R 170 4.6” 18" 500 80,000 7
200-9R-1B-5.5 — 9R 200 4.6” 18" 760 80,000 7
230-12R-1B-5.5 — 12R 230 4.6” 18" 1000 80,000 7
390-18R-2B-5.5 — 18R 390 7.4” 18" 1500 80,000 8
450-24R-2B-5.5 — 24R 450 7.4” 18" 1950 80,000 8
550-30R-2B-5.5 — 30R 550 8.4” 18" 2400 80,000 8
600-32R-2B-5.5 — 32R 600 8.4” 18" 2650 80,000 8
650-36R-2B-5.5 — 36R 650 8.4” 18" 2900 80,000 8
5.5 KV
Inverted Bolt “IB”
70-2R-1IB-5.5 — 2R 70 — 18" 170 80,000 9
100-3R-1IB-5.5 — 3R 100 — 18" 250 80,000 9
130-4R-1IB-5.5 — 4R 130 — 18" 340 80,000 9
150-5R-1IB-5.5 — 5R 150 — 18" 390 80,000 9
170-6R-1IB-5.5 — 6R 170 — 18" 500 80,000 9
200-9R-1IB-5.5 — 9R 200 — 18" 760 80,000 9
230-12R-1IB-5.5 — 12R 230 — 18" 1000 80,000 9
390-18R-2IB-5.5 — 18R 390 — 18" 1500 80,000 10
450-24R-2IB-5.5 — 24R 450 — 18" 1950 80,000 10
550-30R-2IB-5.5 — 30R 550 — 18" 2400 80,000 10
600-32R-2IB-5.5 — 32R 600 — 18" 2650 80,000 10
650-36R-2IB-5.5 — 36R 650 — 18" 2900 80,000 10
8.25 KV
Bolt-In Mount “BI”
70-2R-1BI-8.25 — 2R 70 3.6” 18" 190 80,000 11
100-3R-1BI-8.25 — 3R 100 3.6” 18" 225 80,000 11
130-4R-1BI-8.25 — 4R 130 3.6” 18" 330 80,000 11
150-5R-1BI-8.25 — 5R 150 3.6” 18" 400 80,000 11
170-6R-1BI-8.25 — 6R 170 3.6” 18" 500 80,000 11
200-9R-1BI-8.25 — 9R 200 3.6” 18" 740 80,000 11
230-12R-1BI-8.25 — 12R 230 3.6” 18" 955 80,000 11
390-18R-2BI-8.25 — 18R 390 7.6” 18" 1440 80,000 12
450-24R-2BI-8.25 — 24R 450 7.6” 18" 1910 80,000 12
Dim.B
Dim.A
Dim.B
Dim.A
Dim.A
3"Dia.
Front View
.44" X .91" Slots (1.53" c.t.c.) Indicator Indicator
Bolt-In Mount “BI”
Figure 11 Figure 12 Figure 13
Medium Voltage Fuses
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Medium Voltage Fuses
© 2005 Littelfuse • POWR-GARD™ Products Catalog
Live Parts
TRIPLE BARREL
Bottom Lever In
Closed Position
.56 Dia. (2) Holes
For Mounting
Cable/Bus
.44 DIA. (2) HOLES
DOUBLE BARREL
SINGLE BARREL
1.75
1.00
2.00
2.00
2.00
4.9
4.85
3.63
3.63
3.75
Top Lever in
Open Position
A
Blown Fuse
Indicator
TOP
VIEW
4.50
3.08
1.50
4.16
.038" HOLES
.78 .63
.08
.30
.31
.08
.71
1.15 .05
.78
Live parts are available for mounting “E”, “R”, and “PT” single, double, and triple barrel fuses.
Mounting clips are available for ferrule type and clip lock style fuses. All clips are sold in pairs.
Contact factory for additional live parts.
Part Number: 700-520-CL*
System Number: 0700520.ZXCL
Clip Lock Design (For CL-14)
Part Number: 700-530*
System Number: 0700530.Z
For use with all 3" diameter fuses.
* One Pair. Dimensions for reference only.
Part Number: 700-500*
System Number: 0700500.Z
For use with all 13/16" (.8125”)
diameter PT fuses.
Mounting Details for Clip Lock
Part Number: 700-156*
System Number: 0700156.Z
For use with 1-9/16" to 1-5/8” (1.625”) diameter PT fuses.
Part Number: 700-300*
System Number: 0700300.Z
For use with 3" diameter fuses.
2.85
2.00
3.74
