W-F-1814/560
Current carrying capacity: 110 percent of rated current indefinitely with temperature rise on the terminals not to exceed 50°C (90°F) above ambient on the body and the ferrules.
Overload interrupt:
Instantaneous: Shall interrupt within 1 hour at 135 percent of rated current and within
2 minutes at 200 percent of rated current.
Time delay: In addition to the above requirement, the fuse shall not interrupt 500 percent of rated current within 10 seconds.
Interrupting capacity rating: 200,000 amperes rms symmetrical at 250 volts, 48 Hz to 60 Hz and a power factor of 20 percent or less. Closing angle shall be essentially at the zero of the voltage wave (maximum offset) or later, to produce start of arcing within 30 electrical degrees prior to system peak voltage.
Threshold ratio: 30 maximum for RK1; 65 maximum for RK5. Peak let-thru current: See table II.
Maximum clearing I2T: See table II.
Applicable fuseholder: Class R for ferrule type fuses in accordance with UL 4248-12.
Part or Identifying Number (PIN): The Government PIN shall consist of the prefix "WF1814/56-" followed by the PIN designation shown in table I.
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