SZNS IEC 60335- 1: 2010 Household and similar electrical appliances- Safety- Part 1: General requirements

E1,115.65

This International Standard deals with safety of electrical appliances for house hold and similar purposes their rated voltage being none more than 250V for single phase appliances and 480V for other appliances

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Description

This International Standard deals with safety of electrical appliances for house hold and similar purposes their rated voltage being none more than 250V for single phase appliances and 480V for other appliances

TABLE OF CONTENTS

Content Page
Foreword 5
INTRODUCTION 8
1 Scope 9
2 Normative references 9
3 Terms and definitions 13
4 General requirement 20
5 General conditions for the tests 21
6 Classification 24
7 Marking and instructions 24
8 Protection against access to live parts 31
9 Starting of motor-operated appliances 32
10 Power input and current 33
11 Heating 34
12 Void 39
13 Leakage current and electric strength at operating temperature 39
14 Transient overvoltages 42
15 Moisture resistance 43
16 Leakage current and electric strength 45
17 Overload protection of transformers and associated circuits 47
18 Endurance 47
19 Abnormal operation 47
20 Stability and mechanical hazards 55
21 Mechanical strength 56
22 Construction 58
23 Internal wiring 68
24 Components 70
25 Supply connection and external flexible cords 74
26 Terminals for external conductors 82
27 Provision for earthing 84
28 Screws and connections 86
29 Clearances, creepage distances and solid insulation 88
30 Resistance to heat and fire 97
31 Resistance to rusting 102
32 Radiation, toxicity and similar hazards 102
Annex A (informative) Routine tests 115
Annex B (normative) Appliances powered by rechargeable batteries 117
Annex C (normative) Ageing test on motors 120
Annex D (normative) Thermal motor protectors 121
Annex E (normative) Needle-flame test 122
Annex F (normative) Capacitors 123
Annex G (normative) Safety isolating transformers 125
COPYRIGHT © IEC. NOT FOR COMMERCIAL USE OR REPRODUCTION  60335-1 © IEC:2010 – 3 –
Annex H (normative) Switches 126
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance 128
Annex J (normative) Coated printed circuit boards 130
Annex K (normative) Overvoltage categories 131
Annex L (informative) Guidance for the measurement of clearances and creepage
distances 132
Annex M (normative) Pollution degree 136
Annex N (normative) Proof tracking test 137
Annex O (informative) Selection and sequence of the tests of Clause 138
Annex P (informative) Guidance for the application of this standard to appliances
used in warm damp equable climates 144
Annex Q (informative) Sequence of tests for the evaluation of electronic circuits 146
Annex R (normative) Software evaluation 148
Bibliography 162
Index of defined words 164
Figure 1 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of class II appliances 103
Figure 2 – Circuit diagram for leakage current measurement at operating temperature
for single-phase connection of appliances, other than those of class II 104
Figure 3 – Circuit diagram for leakage current measurement at operating temperature
for three-phase connection of class II appliances 105
Figure 4 – Circuit diagram for leakage current measurement at operating temperature
for three-phase connection of appliances other than those of class II 106
Figure 5 – Small part 107
Figure 6 – Example of an electronic circuit with low-power points 108
Figure 7 – Test finger nail 109
Figure 8 – Flexing test apparatus 110
Figure 9 – Constructions of cord anchorages 111
Figure 10 – An example of parts of an earthing terminal 112
Figure 11 – Examples of clearances 113
Figure 12 – Example of the placement of the cylinder 114
Figure I.1 – Simulation of faults 129
Figure L.1 – Sequence for the determination of clearances 133
Figure L.2 – Sequence for the determination of creepage distances 135
Figure O.1 – Tests for resistance to heat 138
Figure O.2 – Selection and sequence of tests for resistance to fire in hand-held
appliances 139
Figure O.3 – Selection and sequence of tests for resistance to fire in attended
appliances 140
Figure O.4 – Selection and sequence of tests for resistance to fire in unattended
appliances 141
Figure O.5 – Some applications of the term “within a distance of 3 mm” 143
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– 4 – 60335-1 © IEC:2010
Table 1 – Power input deviation 33
Table 2 – Current deviation 34
Table 3 – Maximum normal temperature rises 37
Table 4 – Voltage for electric strength test 41
Table 5 – Characteristics of high-voltage sources 42
Table 6 – Impulse test voltage 42
Table 7 – Test voltages 46
Table 8 – Maximum winding temperature 49
Table 9 – Maximum abnormal temperature rise 54
Table 10 – Dimensions of cables and conduits 75
Table 11 – Minimum cross-sectional area of conductors 77
Table 12 – Pull force and torque 79
Table 13 – Nominal cross-sectional area of conductors 83
Table 14 – Torque for testing screws and nuts 87
Table 15 – Rated impulse voltage 89
Table 16 – Minimum clearances 90
Table 17 – Minimum creepage distances for basic insulation 94
Table 18 – Minimum creepage distances for functional insulation 95
Table 19 – Minimum thickness for accessible parts of reinforced insulation consisting
of a single layer 96
Table A.1 – Test voltages 116
Table C.1 – Test conditions 120
Table R.1 e – General fault/error conditions 150
Table R.2 e – Specific fault/error conditions 153
Table R.3 – Semi-formal methods 159
Table R.4 – Software architecture specification 159
Table R.5 – Module design specification 160
Table R.6 – Design and coding standards 160
Table R.7 – Software safety validation 161

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