medium voltage fuses 64 w w w . l i t t e l f u s e . c o m 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 tran s 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. 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 fuses 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 65 w w w . l i t t e l f u s e . c o m medium voltage fuses ? 2005 littelfuse ? powr-gard ? products catalog 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 d d 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 C 8,250 volts current range: 2r C 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 66 w w w . l i t t e l f u s e . c o m 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 d d 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 14clip 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 w w w . l i t t e l f u s e . c o m 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.a dim.a (2) .34" x .660 slots 1.38" apart 3" dia. (2) .34" holes 1.38" apart indicator indicator dim.b dim.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 w w w . l i t t e l f u s e . c o m 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 75 w w w . l i t t e l f u s e . c o m 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
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