ECNR 250V/ECSR 600V Class RK5 Dual-Element Time-Delay Fuses


These fuses are recommended for AC power distribution system mains,
feeders and branch circuits having inductive loads (motors, transformers) or
non-inductive loads (lighting, heating) where the available short-circuit
current does not exceed 200,000 RMS symmetrical amps.
These “dual-element, time-delay” fuses have minimum industry standard
time-delay of 10 seconds at 5 times the fuse rating (8 sec. minimum for 250V,
30A and less).
The time-delay characteristics of these fuses typically allows them to be
sized closer to the running ampacity of inductive loads to reduce cost and
provide improved overcurrent protection.
These fuses will override normal equipment current surges to reduce
unnecessary fuse openings.
They are the most popular fuses used in the industry and the most
economical for most applications, especially motors and transformers. They
have moderate current limitation.