LENRK/LESRK CLASS RK Catalog Number LENRK (. - 0A) 50 Volts AC or Less Catalog Number LESRK (.5-0A) 0 Volts AC or Less S LENRK 50V 0..5 75 0..5 5 0..5 9 50 5 0.5 50 0.. 70 0 0..5 5 0 50 7.5 90 0..5 0 50. 5 5 500. 5. 5 0. 5 50 LESRK 0V 0.5.5.5 5 50 0.5.5 7 75 0.. 5 9 50 5.. 50.5.5 70 0. 5 0 50.5.5 7.5 90 0. 5 0 50. 5. 5 500 5 0 LENRK/LESRK SPECIFICATIONS Dual-Element Time-Delay Voltage Rating: Ampere Rating: Interrupting Rating: LENRK - 50VAC, LESRK - 0VAC. - 0 Amps Self-Certified Interrupting Rating: 0,000 RMS Symmetrical Amps Current Limiting:,000 RMS Symmetrical Amps RK Fuse Agency Approvals: UL Listed, Class RK, Guide JDDZ, File E CSA Certified HRCI-R per C., No.. Self-Certified DC Ratings: Voltage Rating: LENRK (.-0) 5VDC LESRK (.5-) VDC; (5-0) 0VDC Interrupting Rating: LENRK/LESRK 0,000 Amperes DC BENEFITS: True dual - element spring - trigger construction allows sizing of 5% FLA for motor backup protection. Superior overload and cycling capabilities. Extremely current limiting; provides superior short circuit component protection. APPLICATIONS: Recommended for AC power distribution system mains, feeders, and branch circuits. Protection of motors and motor branch circuits. Type protection for IEC components. All general - purpose applications including lighting, heating and other non-inductive loads. RECOMMENDED FUSEBLOCKS: Refer to page in this catalog. RECOMMENDED UPGRADE: None. CROSS REFERENCE VOLTS EDISON BUSSMANN GOULD LITTELFUSE 50 LENRK LPN-RK-SP ADR LLNRK 0 LESRK LPS-RK-SP ADR* LLSRK *Not dual element - 0 Amp
LENRK/LESRK CLASS RK LENRK/LESRK dual element FUSES The application recommended for these fuses is exactly the same as for the Edison ECNR/ECSR fuses except for the advantages of greater current limitation. The Edison LENRK/LESRK fuses have up to % more current limitation and up to 50% more Amps-Squared-Second (I t) limitation under fault conditions than Edison ECNR/ECSR fuses to reduce potential for damage. In addition, LENRK/LESRK fuses allow better selectivity for electrical power system designers and better short circuit protection for breakers having inadequate interrupting ratings. ECNR/ECSR and LENRK/LESRK fuse lines are physically interchangeable (and electrically interchangeable per U.L. equipment listing conditions) and are recommended as a practical, economical way to upgrade systems for many situations. True Dual-Element Construction Short-Circuit Element Current Limiting,000 Amps Interrupting Rating. (0,000 amps selfcertified.) Type protection for IEC Components. Overload Element Time-delay permits 5% FLA sizing for back-up, motor running protection. Can protect motors from burnout due to single-phasing. Design of heat absorber reduces watts loss. New PTP Fuse Tube Upgrades resistance to arcing, moisture, and flame. Specification Grade from Edison. CLASS R FUSES WILL FIT CLASS H, K AND R FUSE CLIPS. CLASS R FUSE CLIPS WILL ONLY ACCEPT CLASS R FUSES. FUSES RATED 0 VOLTS AC OR LESS MAY BE APPLIED AT ANY LOWER VOLTAGE. CONTACT EDISON FUSEGEAR FOR SPECIAL PRODUCTS OR APPLICATIONS. DIMENSIONS () Ferrule Design 0 through Amperes Knife Blade 70 through 0 Amperes Overall Max Catalog Length Diameter Number Amps A B 0-.5 5-. LENRK 70-5.. 50V - 7.. 5-0.. 50-0.. 0-5. 5-5.5.0 LESRK 70-7.. 0V - 9.. 5-0.. 50-0.. 7
LENRK/LESRK CLASS RK AVERAGE TIME/CURRENT CURVES LENRK (AMP) 50 VAC LESRK (AMP) 0 VAC 0 / 5/ / / / / / / -/ -/ -/ -/ 5 -/ 0 / 5/ / / / / / / -/ -/ -/ -/ 5 -/ 0 0 0 0............0.0.0..0.0.0.0.0.0.0.0...... 0 0 RMS SYMMETRICAL CURRENT IN S 0 0 0 00.0...... 0 0 RMS SYMMETRICAL CURRENT IN S 0 0 0 00
LENRK/LESRK CLASS RK AVERAGE TIME/CURRENT CURVES LENRK (50V) LESRK (0V) 0 0A A A A A 0A 0A 0 5A 0A A A A A 0A 0A 0 0 0 0............0..0.0.0.0.0.0.0.0.0.0 0 0 0 0 00,000,000 RMS SYMMETRICAL CURRENT IN S,000,000,000 0,000.0 0 0 0 0 0 00,000 RMS SYMMETRICAL CURRENT IN S,000,000,000,000 9
PEAK LET-THROUGH CURRENT CURVES* LENRK/LESRK CLASS RK LENRK (50V) LESRK (0V) 0,000 B 0,000 B 0,000 0,000 INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS,000,000 0,000,000,000,000 0,000,000,000,000,000 A,000 0 0 INSTANTANEOUS PEAK LET-THRU CURRENT IN AMPS,000,000 0,000,000,000,000 0,000,000,000,000,000 A,000 0 0,000,000,000,000,000 0,000,000,000,000 0,000,000 RMS SYMMETRICAL CURRENTS IN S A B=ASYMMETRICAL AVAILABLE PEAK (. X SYMM RMS AMPS),000,000,000,000,000,000 0,000,000,000,000 0,000,000 RMS SYMMETRICAL CURRENTS IN S A B=ASYMMETRICAL AVAILABLE PEAK (. X SYMM RMS AMPS),000 *Curves test data obtained at 5% short-circuit power factor when possible. CURRENT LIMITATION TABLES LENRK (50V)* RMS & Peak Let-Thru Currents (ka) Available Fault Apparent Effective Let-Thru Amperes (ka) current 0 0 RMS Amps I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p,000 5 5 5 7 7 5 7 5 5,000 9 7 5 9 5 7 7 0,000 7 5 9 5 7 5 9 0 7,000 5 9 9 7,000 7 9 7 9,000 7 5 5 5 70,000 7 7 0,000 5 5 7 7 90,000 5 9 5 7 7 9 7 9,000 5 9 5 7 5 9 0,000 5 9 50 LESRK (0V)* RMS & Peak Let-Thru Currents (ka) Available Fault Apparent Effective Let-Thru Amperes (ka) current 0 0 RMS Amps I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p I RMS I p,000 7 7 5 7 5 5,000 5 9 7 9 5 7 5 0,000 7 5 9 5 9,000 7 9,000 7 9 5 7 5 5 5,000 5 7 7 70,000 5 5 7 7 9 7 9 0,000 5 9 5 7 90,000 5 9 5,000 9 5 9 9 5 9 50,000 7 5 7 5 7 5 Note: For I p and I RMS values at 0,000 amperes, consult Factory. *"Apparent Let-Thru Amperes" values are read from "Peak Let-Through Current Curves" and the peak current value divided by. Asymmetry Factor.