BS EN 60745-1:2009+A11:2010:2011 Edition
$215.11
Hand-held motor-operated electric tools. Safety – General requirements
| Published By | Publication Date | Number of Pages |
| BSI | 2011 | 166 |
This part of IEC 60745 deals with the safety of hand-held motor-operated or magnetically driven electric tools, the rated voltage of the tools being not more than 250 V for single-phase a.c. or d.c. tools, and 440 V for three-phase a.c. tools.
So far as is practicable, this standard deals with the common hazards presented by hand-held tools which are encountered by all persons in the normal use and reasonably foreseeable misuse of the tools.
Tools with an electric heating element are within the scope of this standard. They should also comply with relevant parts of IEC 60335.
Requirements for motors not isolated from the supply, and having basic insulation not designed for the rated voltage of the tools, are given in Annex B. Requirements for rechargeable battery-powered motor-operated or magnetically driven tools and the battery packs for such tools are given in Annex K. Those for such tools that are also operated and/or charged directly from the mains or a non-isolated source are given in Annex L.
Hand-held electric tools, hereinafter referred to as tools, which can be mounted on a support or working stand for use as fixed tools without any alteration of the tool itself, are within the scope of this standard. Requirements for such supports or working stands are given in Annex M.
This standard does not apply to:
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hand-held tools intended to be used in the presence of explosive atmosphere (dust, vapour or gas);
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hand-held tools used for preparing and processing food;
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hand-held tools for medical purposes (IEC 60601);
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heating tools which are covered by IEC 60335-2-45;
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tools intended to be used with cosmetics or pharmaceutical products.
For hand-held tools intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary.
For hand-held tools intended to be used in tropical countries, special requirements may be necessary.
NOTE Attention is drawn to the fact that in many countries, additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour, the national water supply authorities, etc.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 7 | CONTENTS |
| 10 | INTRODUCTION |
| 11 | 1 Scope |
| 12 | 2 Normative references |
| 14 | 3 Terms and definitions |
| 21 | 4 General requirements 5 General conditions for the tests |
| 23 | 6 Void 7 Classification |
| 35 | 8 Marking and instructions |
| 44 | 9 Protection against access to live parts |
| 46 | 10 Starting 11 Input and current 12 Heating |
| 48 | Table 1 – Maximum normal temperature rises |
| 50 | 13 Leakage current |
| 51 | 14 Moisture resistance |
| 54 | 15 Electric strength |
| 55 | Table 2 – Test voltages |
| 56 | 16 Overload protection of transformers and associated circuits |
| 57 | 17 Endurance |
| 58 | 18 Abnormal operation |
| 63 | 19 Mechanical hazards |
| 64 | 20 Mechanical strength |
| 65 | Table 4 – Impact energies Table 5 – Test torques |
| 66 | 21 Construction |
| 74 | 22 Internal wiring |
| 75 | 23 Components |
| 78 | 24 Supply connection and external flexible cords |
| 79 | Table 6 – Minimum cross-sectional area of supply cord |
| 82 | Table 7 – Pull and torque value |
| 85 | 25 Terminals for external conductors |
| 86 | Table 8 – Nominal cross-sectional area of conductors |
| 88 | 26 Provision for earthing |
| 90 | 27 Screws and connections |
| 91 | Table 9 – Torque for testing screws and nuts |
| 92 | 28 Creepage distances, clearances and distances through insulation |
| 93 | Table 10 – Minimum creepage distances and clearances |
| 96 | 29 Resistance to heat, fire and tracking |
| 97 | 30 Resistance to rusting |
| 98 | 31 Radiation, toxicity and similar hazards |
| 99 | Figure 1 – Standard test finger |
| 100 | Figure 2 – Test pin Figure 3 – Diagram for leakage current measurement at operating temperature for single-phase connection and three-phase tools suitable for single-phase supply |
| 101 | Figure 4 – Diagram for leakage current measurement at operating temperature for three-phase connection Figure 5 – Ball-pressure test apparatus |
| 102 | Figure 6 – Schematic representation of cord anchorages |
| 103 | Figure 7 – Test fingernail |
| 104 | Figure 8 – Examples of parts of earthing terminals |
| 105 | Figure 9 – Flexing test apparatus |
| 106 | Figure 10 – Circuit for measuring leakage currents Figure 11 – Example of an electronic circuit with low-power points |
| 109 | Annex A (normative) Measurement of creepage distances and clearances |
| 110 | Figure A.1a – Clearance gap for parallel sided and V-shaped groove |
| 111 | Figure A. 1b – Clearance gap for rib and uncemented joint with groove |
| 112 | Figure A.1c – Clearance gap for uncemented joint and diverging-sided groove |
| 113 | Figure A.1d – Clearance gap between wall and screw |
| 114 | Annex B (normative) Motors not isolated from the supply mains and having basic insulation not designed for the rated voltage of the tool |
| 115 | Figure B.1 – Simulation of defects |
| 116 | Annex C Void |
| 117 | Annex D Void |
| 118 | Annex E Void |
| 119 | Annex F (normative) Needle-flame test |
| 120 | Annex G (normative) Proof tracking test |
| 121 | Annex H Void |
| 122 | Annex I (normative) Switches |
| 125 | Annex J (informative) Selection and sequence of the tests of Clause 29 |
| 126 | Annex K (normative) Battery tools and battery packs |
| 130 | Table K.1 – Maximum normal temperature rises for battery tools |
| 135 | Table K.2 – Minimum creepage distances and clearances between parts of opposite polarity |
| 136 | Figure K.1 – Measurement of clearances |
| 137 | Annex L (normative) Battery tools and battery packs provided with mains connection or non-isolated sources |
| 146 | Table L.1 – Minimum creepage distances and clearances between parts of opposite polarity |
| 148 | Figure L.1 – Measurement of clearances |
| 149 | Annex M (normative) Safety of working stands for operation with hand-held motor-operated electric tools |
| 156 | Annex N (informative) Rules for routine tests |
| 157 | Table N.1 – Test voltages for the electric strength test |
| 163 | Bibliography |
