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Dual Element Time-Delay Fuses Class Rk5 and Rk1
ECNR/ECSR/LENRK/LESRK Fuses
PLACE ORDER - True Dual - Element Spring - Trigger Construction Allows Sizing of 125% FLA for Motor Backup Protection
- Superior Overload and Cycling Capabilities
- Extremely Current Limiting; Provides Superior Short Circuit Component Protection
Description
Description
RK5 Dual Element Time-Delay Fuses
These fuses are recommended for AC powerdistribution system mains, feeders andbranch circuits having inductive loads(motors, transformers) or non-inductiveloads (lighting, heating) where the availableshort-circuit current does not exceed200,000 RMS symmetrical amperes. These "dual element, time-delay" fuses haveminimum industry standard time-delay of10 seconds at 5 times the fuse rating (8 sec.minimum for 250V, 30A and less). The timedelaycharacteristics of these fuses typicallyallows them to be sized closer to the runningampacity of inductive loads to reduce costand provide improved overcurrentprotection. These fuses will override normalequipment current surges to reduceunnecessary fuse openings. They are themost popular fuses used in the industry andthe most economical for most applications,especially motors and transformers. Theyhave moderate current limitation.
CLASS R FUSES WILL FIT CLASS H, K ANDR FUSE CLIPS. CLASS R FUSE CLIPS WILLONLY ACCEPT CLASS R FUSES. FUSESRATED 600 VOLTS AC OR LESS MAY BEAPPLIED AT ANY LOWER VOLTAGE.
RK1 Dual Element Time-Delay FusesThe application recommended for thesefuses is exactly the same as for the EdisonECNR/ECSR fuses except for the advantagesof greater current limitation. The EdisonLENRK/LESRK fuses have up to 40% morecurrent limitation and up to 350% moreAmps-Squared-Second (I2t) limitation underfault conditions than Edison ECNR/ECSRfuses to reduce potential for damage. Inaddition, LENRK/LESRK fuses allow betterselectivity for electrical power systemdesigners and better short circuit protectionfor breakers having inadequate interruptingratings. ECNR/ECSR and LENRK/LESRK fuselines are physically interchangeable (andelectrically interchangeable per U.L.equipment listing conditions) and arerecommended as a practical, economicalway to upgrade systems for many situations.
SPECIFICATIONS
Voltage Rating:
ECNR and LENRK: 250 Vac
ECSR and LESRK: 600 Vac
Ampere Rating:
ECNR and ECSR: 0.1 to 600 A
LENRK and LESRK: 0.2 to 600 A
Interrupting Rating: 200,000 RMSsymmetrical amps
LENRK and LESRK Self-CertifiedInterrupting Rating: 300,000 RMSsymmetrical amps
Current Limiting:
ECNR and ECSR: RK5 fuse
LENRK and LESRK: RK1 fuse
Agency Approvals: UL Listed, Class RK5and RK1, Guide JDDZ, File E162363; CSACertified HRCI-R per C22.2, No. 248.12
Self-Certified DC Ratings:
Voltage Rating: ECNR (0.1 to 600)125 Vdc; ECSR (0.1 to 600) 300 Vdc;LENRK (0.2 to 600) 125 Vdc; LESRK(0.25 to 30) 200 Vdc; (35 to 600)300 Vdc
Interrupting Rating:
ECNR and ECSR: 20,000 amperes DC
LENRK and LESRK: 20,000 amperes DC Anemometer | Automation | Accelerometers | Calibrator | Cartridge Heaters | Chart Recorders | Cryogenics | Custom Pressure Transducers | Data Loggers | Data Acquisition | Dial Thermometers | Fiber Optics | Fiber Optic Temperature Measurement | Flexible Heaters | Flow Meters | Glass Bulb Thermometers | Grippers | Heaters | Humidity Measurement | Integrated Circuit Sensors | Immersion Heaters | Infrared Thermometers | Level Measurement | Load Cells | M12 Temperature Connectors | Magnetic Flow Meter | Panel Meter | PID Controllers | pH meter | Pressure Gauges | Pressure Transducers | Pressure Transmitters | Rotameters | RTD | Remote Process Monitoring | Sanitary Sensors | Signal Conditioners | Stepper Motors | Strain Gages | Strip Heaters | Temperature Controllers | Temperature Labels | Temperature Measurement | Temperature Sensor Manufacturing | Temperature Sensors | Temperature Transmitters | Thermal Imagers | Thermistors | Thermocouple | Thermocouple Wire | Thermowell | Ultrasonic Flow Meters | Vortex Flow Meter | Wireless Sensors
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