39018R2C2.75W Littelfuse Inc, 39018R2C2.75W Datasheet

BULK / FUS 2.75KV MV R-RATED 18R HOOKEYE

39018R2C2.75W

Manufacturer Part Number
39018R2C2.75W
Description
BULK / FUS 2.75KV MV R-RATED 18R HOOKEYE
Manufacturer
Littelfuse Inc
Datasheet

Specifications of 39018R2C2.75W

Current Rating
390 Amps
Voltage Rating
2.75 KVolts
Fuse Size / Group
18R
Termination Style
Clip
Product
Medium Voltage Fuse
Interrupt Rating
80 KAmps at 2.75 KVoltsAC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
64
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
Medium Voltage Fuses
w w w . l i t t e l f u s e . c o m
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.
Bolt-in Mount Fuses
© 2005 Littelfuse
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
force 2lb. min
POWR-GARD
1
/
2
” min; extension
Products Catalog

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39018R2C2.75W Summary of contents

Page 1

... 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 ...

Page 2

... R Rated Medium Voltage Fuses Current-Limiting 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 ...

Page 3

R Rated Medium Voltage Fuses Current-Limiting Dim.A (Clip Center) R Old Catalog Catalog Number Rated Number 70-2R-1C-5.5 LCL 2R 100-3R-1C-5.5 LCL 3R 130-4R-1C-5.5 LCL 4R 150-5R-1C-5.5 LCL 5R 170-6R-1C-5.5 LCL 6R 200-9R-1C-5.5 LCL 9R 230-12R-1C-5.5 LCL 12R 390-18R-2C-5.5 LCL 18R ...

Page 4

R Rated Medium Voltage Fuses Current-Limiting (2) .34" X .660 Slots 1.38" Apart 3" Dia. Indicator (2) .34" Holes 1.38" Apart Dim.A Figure 7 Bolt Mount “B” Old R Catalog Catalog Number Rated Number — 70-2R-1B-2.75 — 00-3R-1B-2.75 — 30-4R-1B-2.75 ...

Page 5

R Rated Medium Voltage Fuses Current-Limiting .44" X .91" Slots (1.53" c.t.c.) Bolt-In Mount “BI” Old R Catalog Catalog Number Rated Number 70-2R-1BI-5.5 — 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 — 390-18R-2BI-5.5 — 450-24R-2BI-5.5 — ...

Page 6

Live Parts Part Number: 700-156* System Number: 0700156.Z For use with 1- / " ” (1.625”) diameter PT fuses Part Number: 700-500* System Number: 0700500.Z For use with all / " (.8125”) 13 ...

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