BS 2559-3-1973 Specification for screwdrivers - Insulated screwdrivers《螺钉旋具规范 第3部分 绝缘螺钉旋具》.pdf

1、BRITISH STANDARD BS 2559-3: 1973 Incorporating Amendment No.1 Specification for Screwdrivers Part 3: Insulated screwdrivers UDC 621.883.7784.37:621.315.616:678.544.4BS2559-3:1973 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee, was published under

2、 the authorityof the Executive Boardon 26 January1973 BSI09-1999 The following BSI references relate to the work on this standard: Committee reference MEE/120/2 Draft for comment70/30872 ISBN 0 580 07495 1 Co-operating organizations The Mechanical Engineering Industry Standards Committee, under whos

3、e supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and industrial organization marked with an asterisk in the above list, together with the following, were dir

4、ectly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Engineering Equipment Users Association Association of Consulting Engineers Gas Council Association of Hydraulic Equipment Institution of Civil Engineers Manufacturers L

5、td. Institution of Gas Engineers Association of Mining Electrical and Institution of Heating and Ventilating Mechanical Engineers Engineers British Compressed Air Society Institution of Mechanical Engineers British Electrical and Allied Manufacturers Institution of Mechanical Engineers Association (

6、Automobile Division) British Gear Manufacturers Association Institution of Plant Engineers British Internal Combustion Engine Institution of Production Engineers Manufacturers Association Locomotive and Allied Manufacturers British Mechanical Engineering Confederation Association of Great Britain Br

7、itish Pump Manufacturers Association London Transport Executive British Steel Industry Machine Tool Trades Association Crown Agents for Oversea Governments and Ministry of Defence* Administrations Ministry of Defence, Army Department* Department of Employment (H.M. Factory National Coal Board* Inspe

8、ctorate) National Physical Laboratory (Department of Department of the Environment Trade and Industry) Department of Trade and Industry Process Plant Association Department of Trade and Industry National Royal Institute of British Architects Engineering Laboratory Telecommunication Engineering and E

9、lectricity Council, the Central Electricity Manufacturing Association Generating Board and the Area Boards in Water-tube Boilermakers Association England and Wales British Railways Board National Federation of Building Trades British Woodwork Manufacturers Association Employers Engineers Allied Hand

10、 Tool Makers National Union of Furniture Trades Association Operatives Federation of British Hand Tool Post Office Manufacturers Railway Technical Centre Furniture Industry Research Association Rolled Thread Screw Association Furniture, Timber and Allied Trades Union Saw Manufacturers Association In

11、corporated British Institute of Certified Society of British Aerospace Companies Ltd. Carpenters Society of Motor Manufacturers and Traders Light Trades Tool Association Ltd. Ministry of Defence, Navy Department Amendments issued since publication Amd. No. Date of issue Comments 1372 February 1974 I

12、ndicated by a sideline in the marginBS2559-3:1973 BSI 09-1999 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Nomenclature 1 3 General requirements 1 4 Material 1 5 Insulation 1 6 Marking 1 7 Testing 1 8 Range of sizes 1 Figure 1 Typical insulated screwdriver 2

13、Publications referred to 4BS2559-3:1973 ii BSI 09-1999 Foreword This Part of this British Standard has been prepared under the authority of the Mechanical Engineering Industry Standards Committee. On premises subject to the Factories Act, Regulation24 of the Electricity (Factories Act) Special Regul

14、ations1908 and1944 requires that portable insulating stands, screens, boots, gloves, or other suitable means, shall be provided and used when necessary to prevent danger, and shall be periodically examined by an authorized person. “Other suitable means” include insulated hand tools such as spanners,

15、 pliers, cutters, nippers, and screwdrivers, etc. This first standard for the insulation of screwdrivers sets out the material, fitting, insulation thickness and testing of such screwdrivers, where experience has shown that the use of satisfactorily insulated hand tools is required. Part1 of this Br

16、itish Standard deals with screwdrivers for slotted head screws. Other Parts, in course of preparation, will deal with ratchet screwdrivers, spiral ratchet screwdrivers and associated bits. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Sta

17、ndards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 to4, an inside back cover and a back cover. This sta

18、ndard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS2559-3:1973 BSI 09-1999 1 1 Scope This Part of this British Standard relates to screwdrivers of the basic types with plastics handle referre

19、d to in Parts1 and 2 of this standard but which are specially insulated for use on live electrical apparatus up to and including650volts. NOTEThe titles of the British Standards referred to in this Part of this standard are listed on the inside back cover. 2 Nomenclature For the purposes of this Par

20、t of this British Standard, the nomenclature shown in Figure 1 shall apply. The nominal size of a screwdriver shall be the length of the blade. NOTEFigure 1 shows a typical Engineers screwdriver but the terms given also apply to other types. 3 General requirements The insulated screwdrivers shall me

21、et the requirements of Parts1 and2 1)of this standard where applicable. 4 Material WARNING. Plastics such as Nylon11 G.P.E. may be attacked by coming into contact with certain mineral and organic acids resulting in the destruction of their insulation properties. 4.1 Blades. Blades shall be manufactu

22、red from steel conforming to the requirements of Part1 or Part2 1)of this standard. 4.2 Handles. Handles shall be manufactured from plastics material of cellulose acetate to BS1524, cellulose acetate butyrate orNylon11 G.P.E. 4.3 Blade insulation. Blade insulation shall be of a material with physica

23、l and di-electric characteristics equal or superior to those of Nylon11 G.P.E. natural colour. The insulation shall be injection moulded to the blade and collar of the plastics handle in such a manner that an anti-twist and an anti-pull lock is formed at the area of encapsulation. 5 Insulation Where

24、 Nylon11 G.P.E. natural colour is used, the thickness of the insulation shall be: 1) 2.3mm nominal for blades6.3mm diameter and larger; 2) 1.6mm nominal for blades4.8mm diameter and less than6.3mm diameter; 3) 0.8mm nominal for blades less than4.8mm diameter. The length of the encapsulation of the p

25、lastics handle shall not be less than19mm and shall come within13mm from the point (see Figure 1). 6 Marking Each insulated screwdriver shall be plainly and indelibly marked with the following: 1) BS2559-3. 2) The manufacturers name or trademark. 3) The maximum voltage at which it may be used i.e.65

26、0V max. The marking shall be carried out in such a manner that it will not impair the insulation properties. NOTEAttention is drawn to certification facilities offered by BSI; see the inside back cover of this standard. 7 Testing After insulation, screwdrivers shall be capable of passing the torque

27、tests given in Parts1 and2 1)of this standard and subsequently shall be subjected to an electrical insulation test by being immersed in water as near as practicable to the extent of the insulation so as not to allow surface flashover (adistance of25mm has been found to be practicable) and shall with

28、stand a potential of5kV alternating current between the metal and the water for a period of2 minutes. 8 Range of sizes The range of sizes for screwdrivers shall be as given in Parts1 and2 1)of this standard. The type of Engineers screwdriver with tang through handle and capped, as illustrated in Fig

29、ure4 of Part1 of this standard, shall not be insulated for use on live apparatus. 1) In course of preparation.BS2559-3:1973 2 BSI 09-1999 Figure 1 Typical insulated screwdriver3 blankBS2559-3:1973 BSI 09-1999 4 Publications referred to This standard makes reference to the following British Standards

30、: BS 1524, Cellulose acetate moulding material. BS 2559, Screwdrivers. BS 2559-1, Screwdrivers for slotted head screws. BS 2559-2, Screwdrivers and screwdriver bits for recessed head screws 2) . 2) In course of preparation.BS2559-3:1973 BSI 09-1999 BSI Certification Trade Mark The Kitemark The Briti

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