39018R2C2.75W Littelfuse Inc, 39018R2C2.75W Datasheet - Page 2

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

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

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. 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
© 2005 Littelfuse
Add “w” suffix to part number for hookeye attachment.
Rated
R
390-18R-2C-2.75
450-24R-2C-2.75
230-12R-1C-2.75
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
70-2R-1C-2.75
•
POWR-GARD
Number
Catalog
130-4R-1C-5.5
™
Products Catalog
Catalog
Number
LCK 2R
LCK 3R
LCK 4R
LCK 5R
LCK 6R
LCK 9R
LCK 12R
LCK 18R
LCK 24R
Center
Dim.A
Old
Clip
Figure 1
3"DIA
D
Size
12R
18R
24R
2R
3R
4R
5R
6R
9R
Dim.B
Max Voltage (KV)
Style (C-Cartridge)
No. of Barrels
Rating (size)
Continuous Current
Continuous Current
@ 40 deg C.
w w w . l i t t e l f u s e . c o m
Maximum
Medium Voltage Fuses
100
130
150
170
200
230
390
450
70
Figure 2
6.38"
DD
Characteristics
Voltage Rating:
Current Range:
Options
• Hermitically sealed for use in hazardous locations
• Bolt-in mounting configurations
A
(inches)
Dim. A
(add “S” suffix to part number)
7"
7"
7"
7"
7"
7"
7"
7"
7"
(inches)
Dim. B
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
10.875"
2,400 volts – 8,250 volts
2R – 36R
Rating RMS Amps
Min. Interrupting
Figure 3
DDD
9.75"
1000
1500
1950
250
340
390
500
760
170
Rating RMS Asym
Max Interrupting
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
80,000
Hookeye Feature*
* For hookeye attach-
ment; add “W” suffix
to part number
Number
Figure
1
1
1
1
1
1
1
2
2
65