W-F-1814/570
REQUIREMENTS:
Interface and physical dimensions: See figure 1. Physical: Nonrenewable.
Terminals: Ferrule type. The ferrules shall be approximately circular in cross-section.
Material: Brass, copper, or copper alloy.
Strength: 5 inch-pound torque between body and ferrules.
Alignment: The inside diameter of tubular gauge shall be not more than .823 inch (20.90 mm). Body:
Insulating material: Fiber, ceramic, melamine-impregnated glass fiber, or other suitable material. Electrical:
Voltage: 250 volts or less. Frequency: 48 Hz to 60 Hz. Current: See table I.
Current carrying capacity: 110 percent of rated current indefinitely with temperature rise 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
4 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 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.
3
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business