Powered by Google www.ChineseStandard.net Database: 189760 (18 May 2024)

GB 4943-2001 PDF in English


GB 4943-2001 (GB4943-2001) PDF English
Standard IDContents [version]USDSTEP2[PDF] delivered inName of Chinese StandardStatus
GB 4943-2001English770 Add to Cart 0-9 seconds. Auto-delivery. Safety of information technology equipment Obsolete


Standards related to: GB 4943-2001

GB 4943-2001: PDF in English

GB 4943-2001 (Replaced by GB 4943.1-2011)
GB4943-2001 (Replaced by GB4943.1-2011)
ICS 35.020
L 09
GB
National Standard
of The People’s Republic of China
GB 4943-2001 (Replaced by. GB 4943.1-2011)
Eqv. IEC 60950. 1999
Safety of Information Technology
Equipment
ISSUED ON. NOVEMBER 12, 2001
IMPLEMENTED ON. MAY 1, 2002
Issued by. State Administration of Quality Supervision, Inspection and
Quarantine, PRC
Table of Contents
Preface ... 14
IEC Foreword ... 15
INTRODUCTION ... 16
0 Principles of safety ... 16
0.1 General principles of safety ... 16
0.2 Hazards ... 18
0.2.1 Electric shock ... 18
0.2.2 Energy related hazards ... 20
0.2.3 Fire ... 21
0.2.4 Heat related hazards ... 21
0.2.5 Mechanical hazards ... 22
0.2.6 Radiation ... 22
0.2.7 Chemical hazards ... 23
0.3 Materials and components ... 23
1 General ... 24
1.1 Scope ... 24
1.1.1 Equipment covered by this Standard ... 24
1.1.2 Additional requirements ... 25
1.1.3 Exclusions ... 26
1.2 Definitions ... 26
1.2.1 Equipment electrical ratings ... 26
1.2.2 Operating conditions ... 27
1.2.3 Equipment mobility ... 28
1.2.3.2 HAND-HELD EQUIPMENT ... 28
1.2.4 Classes of equipment – Protection against electric shock ... 29
1.2.5 Connection to the supply ... 30
1.2.6 Enclosures ... 31
1.2.7 Accessibility ... 32
1.2.8 Circuits and circuit characteristics ... 33
1.2.9 Insulation ... 37
1.2.10 CLEARANCE & CREEPAGE DISTANCE ... 38
1.2.11 Components ... 39
1.2.12 Flammability ... 40
1.2.13 Miscellaneous ... 42
1.3 General requirements ... 44
1.3.1 Application of requirements ... 44
1.3.2 Equipment design and construction ... 45
1.3.3 Supply voltage ... 45
1.3.4 Constructions not specifically covered ... 45
1.3.5 Equivalent materials ... 45
1.3.6 Orientation during transport and use ... 46
1.3.7 Choice of criteria ... 46
1.3.8 Examples mentioned in this Standard ... 46
1.3.9 Conductive liquids ... 46
1.4 General conditions for tests ... 46
1.4.1 Application of tests ... 46
1.4.2 Type tests ... 47
1.4.3 Test samples... 47
1.4.4 Operating parameters for tests ... 48
1.4.5 Supply voltage for tests ... 48
1.4.6 Supply frequency for tests ... 49
1.4.7 Electrical measuring instruments... 49
1.4.8 Normal operating voltages ... 49
1.4.9 Measurement of voltage to earth ... 50
1.4.10 Loading configuration of the EUT ... 50
1.4.11 Power from a telecommunication network ... 51
1.4.12 Temperature measurement conditions ... 51
1.4.13 Temperature measurement methods ... 51
1.4.14 Simulated faults and abnormal conditions ... 52
1.5 Components... 53
1.5.1 General ... 53
1.5.2 Evaluation and testing of components ... 53
1.5.3 Thermal controls ... 54
1.5.4 Transformers ... 54
1.5.5 Interconnecting cables ... 54
1.5.6 Capacitor of PRIMARY CIRCUIT ... 54
1.5.7 Components bridging double insulation or reinforced insulation ... 55
1.5.7.1 Bridging Capacitor ...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.