LENRK/LESRK Class RK1 Dual-Element Time-Delay 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 40% more current limitation and up to 350% more Amps-Squared-Second (I2t) 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 UL equipment listing conditions) and are recommended as a practical, economical way to upgrade systems for many situations.
250 Volt LENRK Data Sheets
Data Sheet # 1310 (70-600 Amps)
600 Volt LESRK Data Sheets
Data Sheet # 1312 (70-600 Amps)
| Catalog Number | LENRK, LESRK |
| Volts | LENRK - 250Vac LESRK - 600Vac |
| Amps | 0.2 - 600 Amps |
| Interrupting Rating | 200kA RMS Sym. |
| Current Limiting | RK1 Fuse |
| Agency Approvals | UL Listed, Class RK1, Guide JDDZ, File E162363 CSA Certified, HRCI-R per C22.2, No. 248.12 |
Features
Self-Certified DC Ratings:
Voltage Rating: LENRK (0-60A) 125Vdc; (70-600A) 250Vdc; LESRK (0.25-600A) 300Vdc
Interrupting Rating: LENRK/LESRK 20,000 Amps DC
Benefits:
- 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.
Applications:
- Recommended for AC power distribution system mains, feeders, and branch circuits.
- Protection of motors and motor branch circuits.
- Type 2 “No Damage” protection for IEC components.
- All general-purpose applications including lighting, heating and other non-inductive loads.
