1、 AMSC N/A FSC 5920 W-F-1814/3C 21 July 2009 SUPERSEDING W-F-1814/3B 24 June 2004 FEDERAL SPECIFICATION SHEET FUSE, CARTRIDGE, HIGH INTERRUPTING CAPACITY, CLASS G (CURRENT-LIMITING) 480 VOLTS, 21-30 AMPERES The General Services Administration has authorized the use of this federal specification sheet
2、 by all federal agencies. The complete requirements for procuring the fuses described herein shall consist of this document and the latest issue in effect of W-F-1814. Inches mm .006 .15 .03 .76 .281 7.14 .375 9.53 .406 10.31 1.62 41.15 NOTES: 1. Dimensions are in inches. 2. Metric equivalents are g
3、iven for general information only. 3. Minimum acceptable thickness of ferrule side wall .025 (.64 mm). 4. Unless otherwise specified, tolerances are .02 (0.51 mm) for two-place decimals and .005 (0.13 mm) for three-place decimals. FIGURE 1. Configuration and dimensions. INCH-POUND Provided by IHSNot
4、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-F-1814/3C 2 REQUIREMENTS: Interface and physical dimensions: See figure 1. Physical: Nonrenewable. Terminals: Ferrule type. Material: Brass, copper, or copper alloy. Strength: 2 pound-inches torque between body and fer
5、rules. Body: Insulating material: Fiber, ceramic, melamine-impregnated glass fiber, or other suitable material. Electrical: Voltage: 480 volts or less. Frequency: 48 Hz to 60 Hz. Current: See table l. Current carrying capacity: 100 percent indefinitely with temperature rise not to exceed 75C above a
6、mbient on the ferrules. Overload interrupt: Time delay: Shall interrupt within 1 hour at 135 percent of rated current and at 200 percent of rated current shall interrupt in not less than 12 seconds nor more than 4 minutes. Watts loss: Average not to exceed 4 watts. Interrupting capacity rating: 100,
7、000 amperes rms symmetrical at 480 volts, 60 Hz, and power factor of 20 percent or less. Threshold ratio: 60 maximum. Peak let-thru current: 7,000 amperes maximum. Maximum clearing: I2T - 7x103 ampere2seconds. Applicable fuseholders: Class G in accordance with UL 4248-5. Part or Identifying Number (
8、PIN): See table l. TABLE l. Electrical characteristics. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-F-1814/3C 3 Government PIN Current rating (amps) WF1814/03-001 WF1814/03-002 25 30 Referenced documents. In addition to W-F-1814, this document
9、references the following: UL 4248-5 The margins of this specification sheet are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidd
10、ers and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITY: Custodians: GSA - FSS Army - CR Navy - YD Preparing
11、activity: Air Force - 85 DLA - CC DLA - CC Review activities: (Project 5920-2009-007) Army - AT, CR4 Navy - OS NSA - NS NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
