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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARDBS EN 50144-2-2 : 1996 The Eur
2、opean Standard EN 50144-2-2 : 1995 has the status of a British Standard ICS 25.040.20 N No o c co op py yi in ng g w wi it th ho ou ut t B BS SI I p pe er rmmi is ss si io on n e ex xc ce ep pt t a as s p pe er rmmi it tt te ed d b by y C Co op py yr ri ig gh ht t L La aw w Safety of hand-held elect
3、ric motor operated tools Part 2-2. Particular requirements for screwdrivers and impact wrenches Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having been prepared under the direction of the Electrotechnical Sector Bo
4、ard, was published under the authority of the Standards Board and comes into effect on 15 August 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reference CPL/61/6 Draft for comment 92/33573 DC ISBN 0 580 24914 X BS EN 50144-2-2 : 1996 Amendments issued sinc
5、e publication Amd. No.DateText affected Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee CPL/61, Safety of electrical appliances, to Subcommittee CPL/61/6, Portable motor-operated tools, upon which the following bodies wer
6、e represented: Agricultural Engineers Association Association of Control Manufacturers (TACMA (BEAMA Ltd.) Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances Consumer Policy Committee of BSI Consum
7、ers Association Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Health and Safety Executive Hire Association Europe Institution of Incorporated Executive Engineers Portable Electric Tool Manufacturers Association Rotating Electrical Machines Association (
8、BEAMA Ltd.) Co-opted members Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1996i BS EN 50144-2-2 : 1996 Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 50144-2-23 Licensed Copy: sheffield
9、un sheffieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1996 BS EN 50144-2-2 : 1996 National foreword This British Standard has been prepared by Subcommittee CPL/61/6 and is the English language version of EN 50144-2-2 : 1995 Safety of hand-held electric motor opera
10、ted tools Part 2-2: Particular requirements for screwdrivers and impact wrenches, incorporating corrigendum March 1996, published by the European Committee for Electrotechnical Standardization (CENELEC). It is to be read in conjunction with BS EN 50144-1 : 1996 General requirements, which it supplem
11、ents or modifies. The many references to Part 1 should be read as references to BS EN 50144-1 : 1996 which is the English language version of EN 50144-1 : 1995. The foreword of EN 50144-2-2 makes reference to the Date of withdrawal, dow, of the relevant national standard. In this case the relevant n
12、ational standard is BS 2769 : Section 2.2 : 1984 which will be withdrawn on 1 December 1996 in accordance with the CENELEC Internal Regulations. Reference is also made to the application of CENELEC Memorandum 6 with regard to certification. Attention is drawn to Note 7 to Memorandum 6 which states:
13、The use of the certificate or mark licence in the running production may not go on for more than 60 months after dow. This should allow necessary changes in the production line and to use up supplies. Within the established period after dow the certificates and mark licences will have to be reconsid
14、ered and cancelled or reissued. For tools intended to be used in locations where special conditions prevail, as in ships and vehicles, and in hazardous locations, for example, where explosions are liable to occur, requirements additional to those specified in the standard may be necessary. WARNING.
15、This standard calls for test procedures that may be injurious to safety or health if adequate precautions are not taken when conducting tests. Product certification. Attention is drawn to the fact that products conforming to this British Standard may be approved by BSI Product Certification, and tha
16、t such certification may be used for the purposes of participation in the CENELEC Certification Agreement. (Details of the BSI certification mark are given on the inside back cover.) Compliance with a British Standard does not of itself confer immunity from legal obligations. Licensed Copy: sheffiel
17、dun sheffieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CENELEC European Committee for Electrotechnical Standardization Comite Europe en de Normalisation Electrotechnique Europa isches Komitee fu r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050
18、Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN 50144-2-2 : 1995 E EUROPEAN STANDARDEN 50144-2-2 NORME EUROPE ENNE EUROPA ISCHE NORM April 1995 ICS 25.140.20Supersedes HD 400.2B S1 : 1980 Incorporates corrigendum March 1996 Descriptors: Hand-held electric motor operated tools, screwd
19、rivers, impact wrenches, safety requirements, protection against electric shocks, fire protection, protection against mechanical hazards English version Safety of hand-held electric motor operated tools Part2-2: Particular requirements for screwdrivers and impact wrenches Se curite des outils e lect
20、roportatifs a moteur Partie 2-2: Re gles particulie res pour les visseuses Sicherheit von handgefu hrten motorbetriebenen Elektrowerkzeugen Teil 2-2: Besondere Anforderungen fu r Schrauber und Schlagschrauber This European Standard was approved by CENELEC on 1994-10-04. CENELEC members are bound to
21、comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central
22、 Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same statu
23、s as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheff
24、ieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 50144-2-2 : 1995 BSI 1996 Foreword This European Standard has been prepared by Technical Committee CENELEC TC 61F, Hand-held and transportable electric motor operated tools. The text of the draft was submitted to th
25、e Unique Acceptance Procedure (UAP) in December 1993 and was approved by CENELEC as EN 50144-2-2 on 1994-10-04. A draft for an amendment was submitted to the Unique Acceptance Procedure in April 1994 and was approved by CENELEC on 1994-10-04 for inclusion into the European Standard. This European St
26、andard replaces HD 400.2B S1 : 1980. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1995-10-01 latest date by which the national standards conflicting with the EN have to be w
27、ithdrawn(dow) 1996-12-01 As far as certification is concerned, CENELEC Memorandum 6 applies. This standard is divided into two parts: Part 1: General requirements, comprising clauses of a general character. Part 2: Particular requirements, dealing with particular types of appliances. The clauses of
28、these particular requirements supplement or modify the corresponding clauses in Part 1. Where the text of Part 2 indicates addition or replacement, the relevant text of Part 1 is to be adapted accordingly. Where no change is necessary, the words This clause of Part 1 is applicable are used. Subclaus
29、es and figures which are additional to those in Part 1 are numbered starting from 101. NOTE. In this standard the following print types are used: Requirements proper: in roman type; Test specifications: in italic type; Explanatory matter: in smaller roman type. Contents Page 1Scope3 2Definitions3 3G
30、eneral requirements3 4General conditions for the tests3 5Rating3 6Classification3 7Marking3 8Protection against electric shock3 9Starting3 10Input and current3 11Heating3 12Leakage current3 13Environmental requirements4 14Moisture resistance4 15Insulation resistance and electric strength4 16Enduranc
31、e4 17Abnormal operation4 18Mechanical hazards4 19Mechanical strength4 20Construction4 21Components4 22Internal wiring4 23Supply connection and external flexible cables and cords4 24Terminals for external conductors4 25Provision for earthing4 26Screws and connections4 27Creepage distances, clearances
32、 and distances through insulation4 28Resistance to heat, fire and tracking4 29Resistance to rusting4 30Radiation4 Figures 101 Loading device5 102 Details of loading device6 Annexes7 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 5
33、0144-2-2 : 1995 BSI 1996 1 Scope This clause of Part 1 is applicable except as follows: 1.1 Addition: This standard applies to screwdrivers and impact wrenches. 2 Definitions This clause of Part 1 is applicable except as follows: 2.2 Replacement: 18 normal load The load obtained when the tool is ope
34、rated intermittently, each cycle comprising a period of operation of 10 min and a rest period of 10 min with the tool switched off, the load during the periods of operation being such that the input, in watts, is equal to: P0+ 0,3P1 for screwdrivers marked with the symbol M and for impact wrenches;
35、P03 300 3+ 1,3 3 1 + P2 P0 (n0+ n2) 550 + n0+ n2 for other screwdrivers; where: P0is the input, in watts, under no-load conditions, measured after the tool has been operating for a period of 30 min with no load; P1is the input, in watts, measured when the clutch, adjusted at maximum torque, is slipp
36、ing or when the impact gear operates; if no clutch is provided, P1is 0,7 times the input, in watts, measured under locked-rotor conditions; P2is the input, in watts, measured immediately before the clutch slips when the load is applied gradually, the clutch being adjusted at maximum torque; if no cl
37、utch is provided or if the clutch is not adjustable or does not slip, P2 is 0,7 times the input, in watts, measured under locked-rotor conditions; n0is the speed, in revolutions per minute, of the spindle, after the tool has been operating for a period of 30 min with no load; n2is the speed, in revo
38、lutions per minute, of the spindle, corresponding with P2; NOTE. Inputs and speeds are those obtained at rated voltage or at the upper limit of the rated voltage range. 3 General requirements This clause of Part 1 is applicable. 4 General conditions for the tests This clause of Part 1 is applicable.
39、 5 Rating This clause of Part 1 is applicable. 6 Classification This clause of Part 1 is applicable except as follows: 6.1 Addition: 3) According to purpose: Screwdrivers for screwing into metal only; Screwdrivers for screwing into wood and metal. 7 Marking This clause of Part 1 is applicable except
40、 as follows: 7.1 Addition: Screwdrivers for screwing into metal only shall be marked with: Symbol indicating their purpose. 7.6 Addition: MSymbol indicating the purpose of screwdrivers for screwing into metal only 8 Protection against electric shock This clause of Part 1 is applicable. 9 Starting Th
41、is clause of Part 1 is applicable. 10 Input and current This clause of Part 1 is applicable except as follows: 10.1 Replacement: Compliance is checked by measuring the input after the tool has been operating for a period of 30 min, at rated voltage or at the upper limit of the rated voltage range, u
42、nder normal load. 11 Heating This clause of Part 1 is applicable except as follows: 11.5 Replacement: Temperature rises are determined at the end of the sixth period of operation. 12 Leakage current This clause of Part 1 is applicable. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:06
43、GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 50144-2-2 : 1995 BSI 1996 13 Environmental requirements This clause of Part 1 is applicable except as follows: 13.2.3 Replacement of paragraphs 1, 2 and 3: Screwdrivers are tested at no-load. Impact wrenches are tested under load using the loading
44、 device shown in figure 101 which is supported on resilient material and mounted on the bench. The details of the loading device are shown in figure 102. Before the test speed is adjusted to 45 r/min5 r/min by means of the nuts number 12 on the loading device. The feed force should be just sufficien
45、t to obtain stable operation. Each test shall be no more than 10 seconds duration. 13.2.4 Addition: For screwdrivers the bit holder shall be horizontal. 13.3 Addition: Screwdrivers are not tested. The vibration level to be quoted being less than 2,5 m/s2. 13.3.3 Replacement of paragraph 1: Measureme
46、nts shall be made in the direction of the reaction torque. 13.3.7 Replacement of paragraph 1: Impact wrenches are tested under the conditions specified in 13.2.3. Paragraph 3 is not applicable. 14 Moisture resistance This clause of Part 1 is applicable. 15 Insulation resistance and electric strength
47、 This clause of Part 1 is applicable. 16 Endurance This clause of Part 1 is applicable except as follows: 16.2 Replacement: The tool is operated under normal load, at rated voltage or at the upper limit of the rated voltage range, for four periods of 6 h each, the interval between these periods bein
48、g at least 30 min. During the test, the tool shall be placed in three different positions, the operating time, at each test voltage, being approximately 8 h for each position. If the temperature rise of any part of the tool exceeds the temperature rise determined during the test of subclause 11.1, f
49、orced cooling or rest periods are applied, the rest periods being excluded for the specified operating time. NOTES The tool may be switched on and off by means of a switch other than incorporated in the tool. The change of position is made to prevent abnormal accumulation of carbon dust in any particular place. The three positions are, in general, horizontal, vertically up and vertically down. During this test, replacement of the carbon brushes is allowed and the tool is oiled and greased as in normal use. 17 Abnormal operation This
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