1、7-/0-!3 W-P-77bB 51 9779974 0043077 2 W-P-796B April 24, 1974 SUPERSEDING Fed. Spec:W-P-796a May 13; 1960 FEDERAL SPECIFICATION PULLERS, FUSE This specification was approved by the Commissioner, Federal Supply Service, General Services Administration, for the use of all Federal agencies. 1. SCOPE AN
2、D CLASSIFICATION 1.1 Scope. This specification covers pullers for use in removing and inserting cartridge-type fuses, 1/4 inch diameter to 2-1/2 inches diameter in size, that are used in electrical circuits up to 600 volts. 1.1.1 Federal s ecification coverage. Federal Specifications do not include
3、all varietr by the title of the specification or which are commercially available, but are intended to cover only those generally used by the Federal Government. 1.2 Classification. Fuse pullers shall be of the following types and sizes as specified (see 6.2) : Type I - Laminated construction. Size
4、1 - 1/4 inch through 1/2 inch, fuse diameter range. Size 2 - 1/2 inch through 1-1/4 inches, fuse diameter range. Size 3 - 1 inch through 2-1/2 inches, fuse diameter range. Type II - Molded construction. Size 1 - 1/4 inch through 1/2 inch, fuse diameter range. Size 2 - 1/2 inch through 1 inch, fuse d
5、iameter range. Size 3 - 1-1/2 inches through 1-3/4 inches, fuse diameter range. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issues in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein: Federal Specification
6、: -7 PPP-P-40 - Hand Tools, Packaging, Packing, and Marking of. (Activities oqtside the Federal Government may obtain copies of Federal Specifications, standards, and Handbooks as outlined under General Information in the Index of Federal Specifications and Standards and at the prices indicated in t
7、he Index. for sale on a subscription basis by the Superintendent of Documents, U. S. Government Printing Office, Washington, DC 20402. The Index, which includes cumulative monthly supplements as issued, is FSC 5120 b THIS DOCUMENT CONTAINS PAGES. , Provided by IHSNot for ResaleNo reproduction or net
8、working permitted without license from IHS-,-,-W-P-796B (Single copies of this specification and other Federal Specifications required by activities outside the Federal Government for bidding purposes are available without charge from Business Service Centers at the General Services Administration R
9、egional Offices in Boston, New York, Washington, DC, Atlanta, Chicago, Kansas City, MOI Fort Worth, Denver, San Francisco, Los Angeles, and Seattle, WA. (Federal Government activities may obtain copies of Federal Specifications, Standards, and Handbooks and the Index of Federal Specifications and St
10、andards from established distribution points in their agencies.) Military Standards: MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. (Copies of Military Specifications and Standards required by suppliers in connection activity or as directed by the contracting officer.) wi
11、th specific procurement functions should be obtained from the procuring 3. REQUIREMENTS 3.1 Design. suitable for removing (and inserting) cartridge type fuses used in electrical circuits up to 600 volts. (see 1.2 and 6.2) and shall be similar to the puller shown in figure 1 or figure 2, as applicabl
12、e. body during insertion and removal from the fuse holders. Size 1 pullers shall have fuse-gripping surfaces on one end only. which are held in the hand shall be provided with a means to prevent slipping. Fuse pullers in accordance with this specification shall be The pullers shall be of the type an
13、d size specified The fuse-gripping surfaces shall provide a firm grip on the fuse The surfaces of size 2 and size 3 pullers 3.1.1 Type I laminated construction type. Type I pullers shall be similar to figure 1 and comply with the dimensions of table I. alternate fiber or plastic sections riveted tog
14、ether to form a scissors-action puller, The center section or sections shall be shaped to form a rib or barrier to provide a firm surface against the fuse body during insertion in fuseholders. They shall be fabricated from 2 FIGURE 1. Type II Laminated construction. Provided by IHSNot for ResaleNo r
15、eproduction or networking permitted without license from IHS-,-,-3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-W-P-7 96 3.4 Identification marking. The manufacturers name or U. S. registered trademark shall be legibly and permanently marked on th
16、e puller in a conspicuous location in addition to any other markings normally included on the equivalent commercial product to indicate intended use or capacity. 3.5 Workmanship. The pullers shall conform to the requirements of this specification and shall be free from any defects which may impair t
17、heir serviceability or appearance. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specifed in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as otherwise specified, the su
18、pplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that,supplies and services conform to prescribed r
19、equirements. 4.1.1 Sampling procedures. Sampling procedures shall be in accordance with MIL-STD-105. Data for sampling shall be as stated in table II. Gategory Sample Visual examination I 2:h Dimensional One examination each One each Testing 4.2 Examination. TABLF, II. Smpling data I I I II 2.5 Defe
20、cts per 4.2.1 100 units I Defects per 100 units s-3 I 2.5 - Each sample unit shall be examined for any 4.2.1 Visual examination. nonconformance in design, material , finish, coating , construction, workmanship, and marking. nonconformance with dimensional requirements. 4.2.2 Dimensional examination.
21、 Each sample unit shall be examined for any 4.3 Testing. 4.3.1 Dielectric strength. After immersion for 24 hours in a solution containing 20 percent NaC1 by weight, the fuse puller shall be washed in fresh water and then allowed to dry for four hours in still air at a room temperature not exceeding
22、80 F. The puller shall then be subjected to 4,000 volt AC test voltage. This voltage shall be applied for one minute between the points where the fuse is gripped and a point located two inches beyond the pivot of the fuse puller. The requirements of 3.3.1 shaL1 be met during and after this test. 4 P
23、rovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-FIGURE 3. Deflection test. Test to determine deflection at “D“ shall be conducted as follows: (a) Support puller as shown in figure 3 with a 1/2 inch solid bar in location shown. The puller may be notche
24、d as required to prevent movement at points “Pi. inch-pounds. (Example: When d = 3.8 inches, F will equal 19.0/3.8 or 5.0 pounds.) (b) Apply a moment load through points “Pi equal to 19.0 (c) (d) Increase applied moment, as in (b) above, to 57.0 Measure distance ID“ and record as “D1“. inch-pounds.
25、(Example: When d = 3.8 inches, F will equal 57.0/3.8 or 15 pounds, (e) (f) Again measure distance “D“ and record as “D2“. The difference between D1 and D2 shall not exceed .12 inch. 4.3.4 Mechanical strength and performance. At completion of the tests in 4-3-31 the sample puller shall be used to rem
26、ove and install a fuse, or dummy fuse, of the proper size for the puller under test. The test shall consist of ten removals and ten insertions. The puller shall meet all the requirements of 3.3. 4.4 Inspection of preparation for delivery. Preservation, packaging, packing, and marking shall be inspec
27、ted in accordance with PPP-P-40 to verify compliance with the requirements of section 5. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_- _-I_. W-P-7768 51 _ _- W 7797774 0043082 b W W-P-796B 5. PREPARATION FOR DELIVERY 5.1 Preservation, packagin
28、g, packing, and marking. Fuse pullexs shall be preserved, packaged, packed, and marked in accordance with PPP-P-40. Preservation and packaging shall be level A, BI or C, as specified (see 6.1). Packing shall be level A, BI or Cl as specified (see 6.1) and marking shall be for civil agencies or milit
29、ary agencies as specified (see 6.2). 6. NOTES 6.1 Intended use. The electrical ratings of the fuses to be pulled by the . fuse pullers covered by this specification are as follows: - 0-30 ampere, 250 volt. 0-100 ampere, 250 volt, or 0-100 ampere, 600 volt. 60-4O0*!ampereI 600 volt. Size 3 - 100-600
30、ampere, 250 volt, or Type II : Size 1 - 0-30 ampere, 250 volt. Size 2 - 0-100 ampere, 250 volt, or . Size 3 - 110-200 ampere, 250 volt, or 0-60 ampere, 600 volt. 110-200 ampere, 600 volt. 6.2 Ordering data. Purchasers should select the preferred options permitted (a) Title, number, and date of this
31、specification. (b) Size required (see 1.2). (c) Selection of applicable level of preservation, packaging, and packing 6.3 Supersession data. herein, and include the following information in procurement documents: (see 5.1). Type I and type II in this revision are replacement N replacement designatio
32、n is applicable designations for class A in W-P-796A. for class BI but either type I or type II in this specification is an acceptable substitute. The fuse .p uller sizes in W-P-796A are superseded by the identical sizes for type I fuses in this specification, except that size 4 fuse pullers in W-P-
33、796Aare not covered. MILITARY CUSTODIANS: DOD has waived cooxdination on revisions and amendments to this Federal Specification until further notice. Preparing activity: GSA-FSS * U. S. GOVERNMENT PRINTING OFFICE : 1974 O - 544-609/1649 Orders for this publication are to be placed with the General Services Administration, acting as an agent for the Superintendent of Documents. See section 2 of this specification to obtain extra copies and other documents referenced herein. Price 10 cents each. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
