1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21284-1 SANS 60335-2-91:2008 Edition 3 IEC 60335-2-91:2008 Edition 3SOUTH AFRICAN NATIONAL STANDARD Household and similar electrical appli
4、ances Safety Part 2-91: Particular requirements for walk-behind and hand-held lawn trimmers and lawn edge trimmers This national standard is the identical implementation of IEC 60335-2-91:2008 and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be us
5、ed in conjunction with SANS 60335-1. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa This standard may only be used and printed by approved subscript
6、ion and freemailing clients of the SABS.SANS 60335-2-91:2008 Edition 3 IEC 60335-2-91:2008 Edition 3 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee StanSA TC 72, Safety of electrical appliances and electronic equipment, in acco
7、rdance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This SANS document, by reference, forms part of the Compulsory specification for electrical and electronic apparatus, as published by Government Notice No. R. 1079 (Government Gazette 25245) of 1 A
8、ugust 2003. Compliance with the requirements of this SANS document will be deemed to be compliance with the said compulsory specification. This SANS document was published in July 2008. This SANS document supersedes SANS 60335-2-91:2003 (edition 2). This standard may only be used and printed by appr
9、oved subscription and freemailing clients of the SABS. IEC 60335-2-91 Edition 3.0 2008-02 INTERNATIONAL STANDARD Household and similar electrical appliances Safety Part 2-91: Particular requirements for walk-behind and hand-held lawn trimmers and lawn edge trimmers INTERNATIONAL ELECTROTECHNICAL COM
10、MISSION X ICS 65.060.70 PRICE CODE ISBN 2-8318-9572-3SANS 60335-2-91:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 2 60335-2-91 IEC:2008(E) CONTENTS FOREWORD.4 INTRODUCTION.6 1 Scope.7 2 Normative references .7 3 Definitions 8 4 General
11、requirement.9 5 General conditions for the tests 9 6 Classification9 7 Marking and instructions.10 8 Protection against access to live parts11 9 Starting of motor-operated appliances 11 10 Power input and current .11 11 Heating 11 12 Void11 13 Leakage current and electric strength at operating tempe
12、rature11 14 Transient overvoltages .11 15 Moisture resistance 11 16 Leakage current and electric strength.12 17 Overload protection of transformers and associated circuits .12 18 Endurance12 19 Abnormal operation 12 20 Stability and mechanical hazards .12 21 Mechanical strength .14 22 Construction.1
13、5 23 Internal wiring.17 24 Components .17 25 Supply connection and external flexible cords 17 26 Terminals for external conductors.18 27 Provision for earthing .18 28 Screws and connections.18 29 Clearances, creepage distances and solid insulation18 30 Resistance to heat and fire.18 31 Resistance to
14、 rusting18 32 Radiation, toxicity and similar hazards19 Annexes .24 Annex B (normative) Appliances powered by rechargeable batteries24 Annex D (normative) Thermal motor protectors26 Annex I (normative) Motors having basic insulation that is inadequate for the rated voltage of the appliance26 SANS 60
15、335-2-91:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60335-2-91 IEC:2008(E) 3 Annex AA (informative) Safety signs and symbols which may be used on lawn trimmers and lawn edge trimmers .27 Annex BB (informative) Vibration .29 Annex CC (i
16、nformative) Noise test code Engineering method (grade 2) 34 Annex DD (informative) Example of a material and construction fulfilling the requirements for an artificial surface.40 Annex EE (informative) Safety instructions 42 Bibliography44 Figure 101 Guard, lawn trimmer (see 20.101.1) .20 Figure 102
17、 Guard, lawn edge trimmer (see 20.101.2).21 Figure 103 Guard strength test (hand-held appliances)22 Figure 104 Cutting head strength test (see 21.102)22 Figure 105 Cutting means measurement (see 22.103) .23 Figure BB.1 Examples of transducer location/orientation (hand-held trimmers) 32 Figure BB.2 E
18、xamples of transducer location/orientation (walk-behind machines)33 Figure CC.1 Microphone positions on the hemisphere (see Table CC.1) 35 Figure DD.1 Sketch of the measurement surface covered with an artificial surface (not to scale) 41 Table CC.1 Co-ordinates of microphone positions36 Table CC.2 A
19、bsorption coefficients 37 SANS 60335-2-91:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS. 4 60335-2-91 IEC:2008(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES SAFETY Part 2-91: Particular require
20、ments for walk-behind and hand-held lawn trimmers and lawn edge trimmers FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote inte
21、rnational co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereaft
22、er referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also partic
23、ipate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an
24、international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all r
25、easonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply
26、 IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its
27、 approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individ
28、ual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, th
29、is IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of th
30、is IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60335-2-91 has been prepared by IEC subcommittee 61F: Safety of hand-held motor-operated electric tools, of IEC technical committee 61:
31、Safety of household and similar electrical appliances. This third edition cancels and replaces the second edition published in 2002. It constitutes a technical revision. Main changes in this edition include the revised endurance test in Clause 18; Annex B, which allows for battery-powered trimmers;
32、and addition of informative Annexes BB, CC and EE on vibration, noise and safety instructions. SANS 60335-2-91:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60335-2-91 IEC:2008(E) 5 The text of this standard is based on the following docu
33、ments: FDIS Report on voting 61F/710/FDIS 61F/713/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. This part 2 is to be used in
34、conjunction with the latest edition of IEC 60335-1 and its amendments. It was established on the basis of the fourth edition (2001) of that standard. NOTE 1 When “Part 1” is mentioned in this standard, it refers to IEC 60335-1. This part 2 supplements or modifies the corresponding clauses in IEC 603
35、35-1, so as to convert that publication into the IEC standard: Safety requirements for walk-behind and hand- held lawn trimmers and lawn edge trimmers. When a particular subclause of Part 1 is not mentioned in this part 2, that subclause applies as far as is reasonable. When this standard states “ad
36、dition”, “modification” or “replacement”, the relevant text in Part 1 is to be adapted accordingly. NOTE 2 The following numbering system is used: subclauses, tables and figures that are numbered starting from 101 are additional to those in Part 1; unless notes are in a new subclause or involve note
37、s in Part 1, they are numbered starting from 101, including those in a replaced clause or subclause; additional annexes are lettered AA, BB, etc. NOTE 3 The following print types are used: requirements proper: in roman type; test specifications: in italic type; notes: in small roman type. Words in b
38、old in the text are defined in Clause 3. When a definition concerns an adjective, the adjective and the associated noun are also in bold. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under “http:
39、/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. SANS 60335-2-91:2008This standard may only be used and pr
40、inted by approved subscription and freemailing clients of the SABS. 6 60335-2-91 IEC:2008(E) INTRODUCTION It has been assumed in the drafting of this international standard that the execution of its provisions is entrusted to appropriately qualified and experienced persons. This standard recognizes
41、the internationally accepted level of protection against hazards such as electrical, mechanical, thermal, fire and radiation of appliances when operated as in normal use taking into account the manufacturers instructions. It also covers abnormal situations that can be expected in practice and takes
42、into account the way in which electromagnetic phenomena can affect the safe operation of appliances. This standard takes into account the requirements of IEC 60364 as far as possible so that there is compatibility with the wiring rules when the appliance is connected to the supply mains. However, na
43、tional wiring rules may differ. If an appliance within the scope of this standard also incorporates functions that are covered by another part 2 of IEC 60335, the relevant part 2 is applied to each function separately, as far as is reasonable. If applicable, the influence of one function on the othe
44、r is taken into account. This standard is a product family standard dealing with the safety of appliances and takes precedence over horizontal and generic standards covering the same subject. An appliance that complies with the text of this standard will not necessarily be considered to comply with
45、the safety principles of the standard if, when examined and tested, it is found to have other features that impair the level of safety covered by these requirements. An appliance employing materials or having forms of construction differing from those detailed in the requirements of this standard ma
46、y be examined and tested according to the intent of the requirements and, if found to be substantially equivalent, may be considered to comply with the standard. SANS 60335-2-91:2008This standard may only be used and printed by approved subscription and freemailing clients of the SABS.60335-2-91 IEC
47、:2008(E) 7 HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES SAFETY Part 2-91: Particular requirements for walk-behind and hand-held lawn trimmers and lawn edge trimmers 1 Scope This clause of Part 1 is replaced by the following. This International Standard deals with the safety of electric powered walk-b
48、ehind and hand- held lawn trimmers and lawn edge trimmers, with cutting element(s) of non-metallic filament line or freely pivoting non-metallic cutter(s), with a kinetic energy of not more than 10 J each, used by a standing operator for cutting grass, their rated voltage being not more than 250 V f
49、or a.c. or 50 V d.c In this standard, hand-held and walk-behind lawn trimmers and lawn edge trimmers are referred to collectively as trimmer(s). So far as is practicable, this standard deals with the common hazards presented by trimmers which are encountered by all persons in the normal use and reasonably foreseeable misuse of the trimmers. NOTE 101 Attention is drawn to the fact that in many countries additional requirements are specified by the national health authorities, the na
