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1、BRITISH STANDARD BS EN 50144-2-5:1996 Safety of hand held electric motor operated tools Part 2-5: Particular requirements for circular saws and circular knives The European Standard EN 50144-2-5:1996 has the status of a British Standard ICS 25.080.60; 25.140.20 Licensed Copy: sheffieldun sheffieldun
2、, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50144-2-5:1996 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1996 BSI 11-199
3、8 The following BSI references relate to the work on this standard: Committee reference CPL/61/6 Draft for comment 92/33575 DC ISBN 0 580 26213 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee CPL/61, Safety of electrica
4、l appliances, to Subcommittee CPL/61/6, Portable motor-operated tools, upon which the following bodies were represented: Agricultural Engineers Association Association of Control Manufacturers (TACMA (BEAMA Ltd.) Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Lt
5、d.) Association of Manufacturers of Domestic Electrical Appliances Consumer Policy Committee of BSI Consumers Association Department of Trade and Industry (Consumer Safety Unit, CA Division) Electricity Association Health and Safety Executive Hire Association Europe Institution of Incorporated Execu
6、tive Engineers Portable Electric Tool Manufacturers Association Rotating Electrical Machines Association (BEAMA Ltd.) Co-opted members Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI B
7、S EN 50144-2-5:1996 BSI 11-1998i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 50144-2-53 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50144-2-5:1996 ii BSI 11-1998 National foreword
8、 This British Standard has been prepared by Technical Committee CPL/61 and is the English language version of EN 50144-2-5 Safety of hand held electric motor operated tools Part 2-5:1996 Particular requirements for circular saws and circular knives, published by the European Committee for Electrotec
9、hnical Standardization (CENELEC). It is to be read in conjunction with BS EN 50144-1:1996 General requirements which it supplements 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
10、EN 50144-2-5 makes reference to the “Date of withdrawal”, dow, of the relevant national standard. In this case the relevant national standard is BS 2769-2.5:1991 which will be withdrawn on 1 December 1996 in accordance with the CENELEC Internal Regulations. Reference is also made to the application
11、of CENELEC Memorandum No. 6 with regard to certification. Attention is drawn to Note 7 to Memorandum No. 6 which states: “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 a
12、nd to the use up supplies. Within the established period after dow the certificates and mark licences will have to be reconsidered and cancelled or re-issued”. For tools intended to be used in locations where special conditions prevail, as in ships and vehicles, and in hazardous locations, for examp
13、le, where explosions are liable to occur, requirements additional to those specified in the standard may be necessary. WARNING. 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 Attenti
14、on is drawn to the fact that products conforming with this British Standard may be approved by BSI Product Certification, and that such certification may be used for the purposes of participation in the CENELEC Certification Agreement. (Details of the BSI certification marks are given on the inside
15、back cover). A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This docume
16、nt comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 16, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front
17、cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50144-2-5 February 1996 ICS 25.080.60; 25.140.20Supersedes IID 400.2E S2:1988 and its amendment Descriptors: Hand-held electric motor
18、 operated tools, circular saws, circular knives, safety requirements, protection against electric shocks, fire protection, protection against mechanical hazards English version Safety of hand-held electric motor operated tools Part 2-5: Particular requirements for circular saws and circular knives S
19、curit des outils lectroportatifs moteur Partie 2-5: Rgles particulires pour les scies circulaires et les couteaux circulaires Sicherheit von handgefhrten motorbetriebenen Elektrowerkzeugen Teil 2-5: Besondere Anforderungen fr Kreissgen und Rundmesser This European Standard was approved by CENELEC on
20、 1995-03-06. CENELEC members are bound to 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
21、 be obtained on application to the Central 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
22、the Central Secretariat has the same status 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
23、 Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 50144-2-5:1996 E
24、Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50144-2-5:1996 2 BSI 11-1998 Foreword This European Standard has been prepared by the Technical Committee 61F, Hand-held and transportable electric motor operated tools. The text of the draf
25、t was submitted to the Unique Acceptance Procedure (UAP) in April 1994 and was approved by CENELEC as EN 50144-2-5 on 1995-03-06. A draft for an amendment was submitted to the Unique Acceptance Procedure in April 1994 and was approved by CENELEC on 1995-03-06 for inclusion into the European Standard
26、. This European Standard replaces HD 400.2E S2:1988 + A1:1991. The following dates were fixed: 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 requ
27、irements, dealing with particular types of appliances. The clauses of these particular requirements supplement or modify the corresponding clauses in Part 1. Where the text of Part 2 indicates an “addition” to or a “replacement” of the relevant requirement, test specification or explanation of Part
28、1, these changes are made to the relevant text of Part 1, which then becomes part of the standard. Where no change is necessary, the words “This clause of Part 1 is applicable” are used in Part 2. Subclauses, tables and figures which are additional to those in Part 1 are numbered starting from 101.
29、NOTEIn this standard the following print types are used: Requirements proper: in roman type; Test specification: in italic type; Explanatory matter: in smaller roman type. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endor
30、sement(dop) 1996-09-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1996-12-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50144-2-5:1996 BSI 11-19983 Contents Page Foreword2 1Scope5 2D
31、efinitions5 3General requirements5 4General conditions for the tests5 5Rating5 6Classification5 7Marking5 8Protection against electric shock6 9Starting6 10Input and current6 11Heating6 12Leakage current6 13Environmental requirements6 14Moisture resistance7 15Insulation resistance and electric streng
32、th7 16Endurance7 17Abnormal operation7 18Mechanical hazards7 19Mechanical strength9 20Construction9 21Components10 22Internal wiring10 23Supply connection and external flexible cables and cords10 24Terminals and external conductors10 25Provision for earthing10 26Screws and connections10 27Creepage d
33、istances, clearances and distances through insulation10 28Resistance to heat, fire and tracking10 29Resistance to rusting10 30Radiation10 Table 101 Test conditions for circular saws7 Figure 101 Circular saw with outer pendulum guard11 Figure 102 Circular saw with inner pendulum guard11 Figure 103 Ci
34、rcular saw with tow guard11 Figure 104 Plunge type saw11 Figure 105 Test probe “a”12 Figure 106 Test probe “b”12 Figure 107 Circular saw with inclinable guide plate13 Figure 108 Aperture in movable guard13 Figure 109 Riving knife adjustment14 Figure 110 Parameters of the guide plate14 Annexes15 Lice
35、nsed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50144-2-5:1996 BSI 11-19985 1 Scope This clause of Part 1 is applicable except
36、as follows: 1.1 Addition: This standard applies to all types of circular saws for cutting wood and similar materials, and to circular knives. These requirements do not cover circular saws when mounted in a support for use as fixed tools. 2 Definitions This clause of Part 1 is applicable except as fo
37、llows: 2.2.18 Addition: normal load for circular saws intended to cut materials other than metal The load obtained when the circular saw is operated continuously with the saw blade in the vertical position, the load being such that the input, in watts, is equal to: where s is the maximum cutting dep
38、th, in millimetres, and n the no-load speed of the saw blade, in revolutions per minute, after the tool has been operating for a period of 15 mm at no-load, at rated voltage or at the upper limit of the rated voltage range. NOTEDefinitions for normal load for metal cutting circular saws and normal l
39、oad for circular knives are under consideration. 2.2 Additions: 101 circular saw with outer pendulum guard A tool the lower guard of which, for operation, swings around the upper fixed guard (see Figure 101). 102 circular saw with inner pendulum guard A tool the lower guard of which, for operation,
40、swings inside the upper fixed guard (see Figure 102). 103 circular saw with tow guard A tool the lower guard of which, for operation, slides along the upper fixed guard (see Figure 103). 104 plunge type circular saw A tool having only a fixed upper guard into which the saw blade retracts when not in
41、 use (see Figure 104). 105 guide plate Part constituting the plane of reference on the material to be cut. 106 fixed guard Cover linked to the motor unit which prevents access to the part of the blade situated above the guide plate. 107 movable guard Cover which, in the rest position, prevents acces
42、s to the part of the blade which is not covered by the fixed guard and which, in most cases, is situated below the guide plate. Plunge type circular saws have only one guard into which the saw blade retracts at the end of the sawing operation. 108 riving knife Metal part placed in the plane of the s
43、aw blade which prevents the wood from tightening onto the rear part of the saw blade and thus prevents the backward movement of the tool or jamming of the saw blade. 3 General requirements This clause of Part 1 is applicable. 4 General conditions for the tests This clause of Part 1 is applicable. 5
44、Rating This clause of Part 1 is applicable. 6 Classification This clause of Part 1 is applicable. 7 Marking This clause of Part 1 is applicable except as follows: 7.1 Addition: Circular saws and circular knives shall be marked with the indication of direction of rotation. This shall be clearly indic
45、ated by a raised or sunk arrow on the fixed guard or by any other means no less visible and indelible. 0,25s for saws with a.c. asynchronous induction motors. 0,2s for other saws designed for cutting depths exceeding 55 mm. 0,13s for other saws designed for cutting depths not exceeding 55 mm, and fo
46、r multi-purpose tools which can be fitted with circular-saw accessories. n n n Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 06:41:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50144-2-5:1996 6 BSI 11-1998 7.13.1 Addition: For circular saws, the instruction sheet shall also include: how
47、to connect the external dust collection equipment where applicable; the maximum and minimum diameter, the thickness range and other characteristics of the blades which can be fitted to the tool; the rated no-load speed of the working spindle. 7.13.2 Addition: Instructions shall also include the subs
48、tance of the following: Do not use blades which are deformed or cracked. Do not use blades made of high speed steel. Do not use blades which do not comply with the characteristics specified in these instructions. Do not stop the blades by lateral pressure on the disc. Ensure that movable guards oper
49、ate freely without jamming. Do not lock the moving guard in the open position. Ensure that any retraction mechanism of the guard system operates correctly. Remove plug from the mains supply before replacement of the blade, making adjustments, or other maintenance work. Using manufacturer data ensure that the diameter, thickness and other characteristics of the saw blade are suitable for the tool; ensure that the saw blade is suitable for the spindle speed of the tool. Do not use saw blades t
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