Medium Voltage Fuses. Medium Voltage Fuses 64. R Rated Medium Voltage Fuses E Rated Medium Voltage Fuses 69-73

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1 64 R Rated Rated Rated Potential Transformer Fuses 74 Live Parts 75

2,400-38,000 VAC General Information Current-limiting and R rated fuses are equipped with a mechanical indicator or striker pin that protrudes through the fuse cap upon operation of the fuse.

min The terms Medium Voltage and High Voltage have been used interchangeably by many people to describe fuses operating above 600 volts.

2 2,400-38,000 VAC General Information Current-limiting 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: xtension distance 1 /2 min; extension force 2lb. min 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. 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. Littelfuse now offers a complete selection of and R 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. Contact the factory or your local Littelfuse representative for additional fuse ratings or custom mounting configurations. 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 NMA and ANSI standards. Additional application data can be found in the Fuse Application section of this catalog. 24 Hour mergency Service is available. Call Applications Power Transformer Protection Potential Transformer Protection Motor Controller Back-up Protection Fused Switches Feeder Circuits Bolt-in Mount Fuses 64

R Rated Features R rated fuses provide required short-circuit protection for medium voltage motors, motor controllers and associated circuitry.

3 R Rated 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 shortcircuit 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. Characteristics Voltage Rating: Current Range: Options 2,400 volts 8,250 volts 2R 36R Hermitically sealed for use in hazardous locations (add S suffix to part number) Bolt-in mounting configurations NMA Standards for R rated medium voltage power fuses require they operate within 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 System 130-4R-1C-5.5 Max Voltage (KV) Style (C-Cartridge) No. of Barrels Rating (size) Continuous Current Hookeye Feature* * For hookeye attachment; add W suffix to part number 3"DIA 6.38" 9.75" Clip Center D DD DDD R Rated 2.75 KV Old Size Maximum Continuous 40 deg C. Dim. A Dim. B Min. Interrupting Rating RMS Amps Max Interrupting Rating RMS Asym 70-2R-1C-2.75 LCK 2R 2R 70 7" " , R-1C-2.75 LCK 3R 3R 100 7" " , R-1C-2.75 LCK 4R 4R 130 7" " , R-1C-2.75 LCK 5R 5R 150 7" " , R-1C-2.75 LCK 6R 6R 170 7" " , R-1C-2.75 LCK 9R 9R 200 7" " , R-1C-2.75 LCK 12R 12R 230 7" " , R-2C-2.75 LCK 18R 18R 390 7" " , R-2C-2.75 LCK 24R 24R 450 7" " ,000 2 Add w suffix to part number for hookeye attachment. 65

4 R Rated 3"DIA 6.38" 9.75" (Clip Center) R Rated 5.5 KV 5.5 KV 14 Clip Centers Old Size Maximum Continuous 40 Degrees C Dim. A Dim. B Min. Interrupting Rating RMS Amps Max Interrupting 70-2R-1C-5.5 LCL 2R 2R 70 12" " , R-1C-5.5 LCL 3R 3R " " , R-1C-5.5 LCL 4R 4R " " , R-1C-5.5 LCL 5R 5R " " , R-1C-5.5 LCL 6R 6R " " , R-1C-5.5 LCL 9R 9R " " , R-1C-5.5 LCL 12R 12R " " , R-2C-5.5 LCL 18R 18R " " , R-2C-5.5 LCL 24R 24R " " , R-2C R " " , R-2C R " " , R-2C R " " , R-2C R " " , R-3C R " " , R-3C R " " , R-3C-5.5 LCL 36R 36R " " , R-1C-5.5X 2R 70 14" " , R-1C-5.5X 3R " " , R-1C-5.5X 4R " " , R-1C-5.5X 5R " " , R-1C-5.5X 6R " " , R-1C-5.5X 9R " " , R-1C-5.5X 12R " " , R-2C-5.5X 18R " " , R-2C-5.5X 24R " " , R-2C-5.5X 30R ,000 5 R Rated 8.25 KV Old Size Maximum Continuous 40 Degrees C Dim. A Dim. B Min. Interrupting Rating RMS Amps Max Interrupting 70-2R-1C R 70 12" " , R-1C R " " , R-1C R " " , R-1C R " " , R-1C R " " , R-1C R " " , R-1C R " " , R-2C R " " , R-2C R " " ,000 5 Add w suffix to part number for hookeye attachment. 66

R Rated Littelfuse POWR-GARD medium voltage fuses are available in several bolt-in mounting configurations. Contact factory for custom configurations.

5 R Rated Littelfuse POWR-GARD medium voltage fuses are available in several bolt-in mounting configurations. Contact factory for custom configurations. B BI IB Bolt mount Bolt-In mount Inverted-Bolt mount Refer to illustrations for mounting dimensions. Indicator (2).34" X.660 Slots 1.38" Apart 3" Dia. Indicator Indicator 3" Dia. Indicator (2).34" Holes 1.38" Apart Bolt Mount B Inverted-Bolt IB R Rated 2.75 KV Bolt Mount B 2.75 KV Inverted Bolt IB Old Size Maximum Continuous Degrees C Dim. A Dim. B Min. Interrupting Max Interrupting Rating RMS Amps 70-2R-1B R " 13" , R-1B R " 13" , R-1B R " 13" , R-1B R " 13" , R-1B R " 13" , R-1B R " 13" , R-1B R " 13" , R-2B R " 13" , R-2B R " 13" , R-1IB R 70 13" , R-1IB R " , R-1IB R " , R-1IB R " , R-1IB R " , R-1IB R " , R-1IB R " , R-2IB R " , R-2IB R " ,

6 R Rated.44" X.91" Slots (1.53" c.t.c.) 3"Dia. Indicator Indicator Bolt-In Mount BI R Rated 5.5 KV Bolt In Mount BI 5.5 KV Bolt Mount B 5.5 KV Inverted Bolt IB 8.25 KV Bolt-In Mount BI Old Front View Size Maximum Continuous 40 C. Dim. A Dim. B Min. Interrupting Max Interrupting Rating RMS Amps 70-2R-1BI-5.5 2R " , R-1BI-5.5 3R " , R-1BI-5.5 4R " , R-1BI-5.5 5R " , R-1BI-5.5 6R " , R-1BI-5.5 9R " , R-1BI R " , R-2BI R " , R-2BI R " , R-2BI R " , R-2BI R " , R-2BI R " , R-2BI R " , R-3BI R " 80, R-3BI R " 80, R-3BI R " 80, R-3BI R " 80, R-1B-5.5 2R " , R-1B-5.5 3R " , R-1B-5.5 4R " , R-1B-5.5 5R " , R-1B-5.5 6R " , R-1B-5.5 9R " , R-1B R " , R-2B R " , R-2B R " , R-2B R " , R-2B R " , R-2B R " , R-1IB-5.5 2R 70 18" , R-1IB-5.5 3R " , R-1IB-5.5 4R " , R-1IB-5.5 5R " , R-1IB-5.5 6R " , R-1IB-5.5 9R " , R-1IB R " , R-2IB R " , R-2IB R " , R-2IB R " , R-2IB R " , R-2IB R " , R-1BI R " , R-1BI R " , R-1BI R " , R-1BI R " , R-1BI R " , R-1BI R " , R-1BI R " , R-2BI R " , R-2BI R " ,

7 Rated Rated fuses have time current characteristics designed to provide current-limiting protection for power transformers, potential transformers, power centers, feeder centers, and unit sub stations. When properly applied, they can protect against high and low fault currents. NMA Standards for rated medium voltage fuses require that fuses rated 100 or less open within 300 seconds (5 minutes) when subjected to an RMS value of % of the fuse continuous current rating; and fuses with an rating larger than 100 must open within 600 seconds (10 minutes) when subjected to an RMS current of % of the fuse s continuous current rating. These values establish one point on the time-current curve. Characteristics Voltage Rating: 2,400 volts 38,000 volts Current Range: Options Hermetically sealed for use in hazardous locations (add S suffix to part number) Clip-lock (CL) and bolt-in styles available. Application Note: Since these fuses are used for the protection of general purpose circuits which may contain transformers, motors, and other equipment producing in-rush and/or overload currents, fuses should generally be rated at 140% of the normal full load current, and circuits should be analyzed to ensure that system load currents will not exceed the current rating of the fuse. (Clip Center) 3"DIA 6.38" 9.75" Rated Old Size Dim. A Dim. B Max Interrupting 2.75 Max. KV 10-1C-2.75 LCX " " 80, C " " 80, C " " 80, C " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C " " 80, C " " 80, C " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C " " 80, C-2.75 LCX " " 80, C-2.75 LCX " " 80, C " " 80, C-2.75 LCX " " 80, C " " 80,

8 Rated Rated Old Size Dim. A Dim. B Max Interrupting Diagram 10-1C " " 80, C " " 80, C " " 80, C " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C " " 80, C " " 80, C " " 80, C " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C-5.5 LCY " " 80, C " " 80, C " " 80, C " " 80, Max. KV 5.5 Max. KV 5NL " 80, NL " 80, NL " 80, NL " 80, NL-30 LCU " 80, NL-40 LCU " 80, NL-50 LCU " 80, NL-65 LCU " 80, NL-80 LCU " 80, NL-100 LCU " 80, NL-125 LCU " 80, NL-150 LCU " 80, NL-175 LCU " 80, NL-200 LCU " 80, NL " 80, NL2-250 LCU " 80, NL2-300 LCU " 80, NL2-350 LCU " 80, NL2-400 LCU " 80, NL2-450 LCU " 80,

9 Rated Rated Old Size Dim. A Dim. B Max Interrupting Diagram 10-1C " " 80,000, C " " 80, C " " 80, C " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ " " 80, C-8.25 LDZ 350Z " " 80, C " " 80, Max. KV 8.25 Max. KV 8NL " " 80, NL " " 80, NL " " 80, NL " " 80, NL-30 LCZ " " 80, NL-40 LCZ " " 80, NL-50 LCZ " " 80, NL-65 LCZ " " 80, NL-80 LCZ " " 80, NL-100 LCZ " " 80, NL2-100 LCZ " " 80, NL2-125 LCZ " " 80, NL2-150 LCZ " " 80, NL2-200 LCZ " " 80, NL " " 80, Rated Old Size Dim. A Dim. B Max Interrupting 10-1C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C " " 80, C " " 80, C " " 80, C " " 80, C-15.5 LDN " " 80, C-15.5 LDN " " 80, C " " 80, C " " 80, C " " 80, C " " 80, Max. KV 71

10 Rated Rated Old Size Dim. A Dim. B Max Interrupting 15GS " " 60, GS " " 60, GS " " 60, GS " " 60, GS " " 60, GS " " 60, GS " " 60, Max. KV 15.5 Max. KV 15NL " " 60, NL " " 60, NL " " 60, NL " " 60, NL-30 LCN " " 60, NL-40 LCN " " 60, NL-50 LCN " " 60, NL-65 LCN " " 60, NL-80 LCN 80S 80 20" " 60, NL-100 LCN 100S " " 60, NL2-80 LCN " " 60, NL2-100 LCN " " 60, NL2-125 LCN 125X " " 60, NL2-150 LCN " " 60, NL " " 60, NL2-200 LCN 200D " " 60, NL " " 60, NL " " 60, NL " " 60, NL " " 60, Rated Old Size Dim. A Dim. B Max Interrupting 15-1C " " 40, C " " 40, C " " 40, C " " 40, C " " 40, C " " 40, C " " 40, C " " 40, C " " 40, Max. KV Rated Old Size Dim. A Dim. B Max Interrupting 3-1C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, C " " 20, Max. KV 72

11 Rated Clip Lock Design The clip lock type designs ensures a positive contact between the fuse and the connection cam. The fuse s clip lock tab slides in between the clip casting and the cam to prevent the fuse from slipping or blowing out of the holder. This positive contact improves heat dissipation and allows fuses to run cooler. Rated Old Size Dim. A Dim. B Max Interrupting 10-1CL " 15.13" 80, CL " 15.13" 80, C " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 15.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, Max. KV Clip Lock Rated Old Size Dim. A Dim. B Max Interrupting 10-1CL " 16.13" 80, CL " 16.13" 80, C " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, CL " 16.13" 80, Max. KV Clip Lock Rated Old Size Dim. A Dim. B Max Interrupting 10-1CL " 18.1" 60, CL " 18.1" 60, CL " 18.1" 60, CL " 18.1" 60, CL " 18.1" 60, CL " 18.1" 60, CL " 18.1" 60, CL " 21.13" 60, CL " 21.13" 60, CL " 21.13" 60, CL " 19.1" 60, CL " 19.1" 60, CL " 19.1" 60, CL " 19.1" 60, CL " 19.1" 60, CL " 19.1" 60, CL " 19.1" 60, Max. KV Clip Lock A B

12 Rated Potential Transformer Fuses Potential Transformer (PT) fuses are current-limiting fuses with high interrupting ratings designed for the protection of potential transformers. Application Note: When applying fuses for the protection of transformers, the magnetizing current in-rush must be considered. The characteristics of the in-rush, which can be matched with a fuse time-current curve, should be available from the transformer manufacturer. Characteristics Voltage Rating: 600VAC 25,500 VAC Current Range: 1/2 10 B A Rated Old Size Length Dim. A Diameter Dim. B Max Interrupting Rating RMS (Sym) 3-4PT , PT , PT , PT , Volt 2.75 Max. kv 2.75 Max.KV 500-4PT-2.4 1/ , PT-2.4 LCD , PT-2.4 LCD , PT , PT , PT , PT , PT , PT , Max. kv 5.5 Max. kv 8.25 Max. kv 15.5 Max. kv 25.8 Max. kv 1-5PT-4.8 LC , PT-4.8 LC ,000 1/2-6PT-5.5 1/ , PT , PT , PT , PT ,000 1/2-8PT-5.5 LCQ.5 1/ , PT-5.5 LCQ , PT-5.5 LCQ , PT-5.5 LCQ , PT-5.5 LCQ , PT-5.5 LCQ ,000 1/2-8PT / , PT , PT , PT ,000 1/2-11PT-15.5 LCT.5 1/ , PT-15.5 LCT , PT-15.5 LCT , PT-15.5 LCT , PT , PT ,000 1/2-16PT-25.5 LCJ 1-4 1/ , PT-25.5 LCJ ,500 74

Live Parts Live parts are available for mounting, R, and PT single, double, and triple barrel fuses. Mounting clips are available for ferrule type and clip lock style fuses.

13 Live Parts Live parts are available for mounting, 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 : * System : Z For use with 1-9 / 16" to 1-5 /8 (1.625 ) diameter PT fuses. Part : * System : Z For use with 3" diameter fuses Part : * System : Z For use with all 13 / 16" (.8125 ) diameter PT fuses..08 Part : * System : Z For use with all 3" diameter fuses " HOLS Part : CL* System : ZXCL Clip Lock Design (For CL-14) Mounting Details for Clip Lock 3.63 TRIPL BARRL 3.63 DOUBL BARRL Bottom Lever In Closed Position * One Pair. Dimensions for reference only. Blown Fuse Indicator TOP VIW Top Lever in Open Position SINGL BARRL 1.00 A Dia. (2) Holes For Mounting Cable/Bus.44 DIA. (2) HOLS 75

MEDIUM VOLTAGE FUSES. POWR-GARD Fuse Datasheet. 2,400-38,000 VAC Current-Limiting

MEDIUM VOLTAGE FUSES. POWR-GARD Fuse Datasheet. 2,400-38,000 VAC Current-Limiting MEDIUM VOLTAGE FUSES 2,400-38,000 VAC Current-Limiting 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