W-F-1814/600
NOTES:
1. 0imensions are in inches.
2. Metric equivalents are given for general information only.
3. Use of screw, pin, or rivet is optional.
4. The dashed line represents the limit of the maximum projection of a screw, rivet head, or the like.
5. Unless otherwise specified, tolerances are ±.02 (0.51 mm) for two-place decimals and ±.005 (0.13 mm) for three-place decimals.
FIGURE 1. Classes RK1 and RK5 fuses, 250 volts, 201-400 amperes - continued.
REQUIREMENTS:
Interface and physical dimensions: See figure 1. Physical: Nonrenewable.
Terminals: Knife blade type.
Material: Copper, or copper alloy.
Strength: 5 inch-pound torque between body and blades. 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 65°C (117°F) on the blades.
Overload interrupt:
Instantaneous: Shall interrupt within 2 hours at 135 percent of rated current and within
10 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.
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