IEC 61482-1-2:2014 specifies procedures to test material and garments intended for use in heat and flame-resistant clothing for workers if there is an electric arc hazard. A directed and constrained electric arc in a test circuit is used to classify material and clothing in two defined arc protection classes. This International Standard is not dedicated toward measuring the arc rating values (ATPV, ELIM, or EBT). Procedures determining these arc rating values are prescribed in IEC 61482-1-1, using an open arc for testing. Other effects than the thermal effects of an electric arc like noise, light emissions, pressure rise, hot oil, electric shock, the consequences of physical and mental shock or toxic influences are not covered by this standard. Protective clothing for work intentionally using an electric arc, e.g. arc welding, plasma torch, is not covered by this standard. This second edition cancels and replaces the first edition, published in 2007. This edition constitutes a technical revision which includes the following significant technical changes with regard to the previous edition: – new mean values of main control parameters arc energy and incident energy based on an extended statistical database consisting of parameter values measured in four laboratories; – reduction of validity check ranges of main control parameters; – determination of the incident energy by averaging the two sensor values of a test (instead of considering each single sensor value); – determination of the heat curves of transmitted incident energy and an amendment to the heat flux acceptance criterion; – clarification of the scope; – and selection of the arc protection classes (test classes) by the amount of the arc energy and incident energy instead of the short-circuit current.<\/p>\n
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| 45<\/td>\n | Foreword Endorsement notice <\/td>\n<\/tr>\n | ||||||
| 46<\/td>\n | Annex ZA (normative) Normative references to international publications with their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 54<\/td>\n | 3.2 Symbols and units used in this document 4 Principle of the test method 4.1 Material box test procedure 4.2 Garment box test procedure <\/td>\n<\/tr>\n | ||||||
| 55<\/td>\n | 5 Significance and use of the test method 6 Test apparatus 6.1 Test apparatus and test box <\/td>\n<\/tr>\n | ||||||
| 57<\/td>\n | Figures Figure\u00a01 \u2013 Test box <\/td>\n<\/tr>\n | ||||||
| 58<\/td>\n | 6.2 Material box test procedure 6.2.1 Arrangement of the material box test procedure Figure\u00a02 \u2013 Test set-up <\/td>\n<\/tr>\n | ||||||
| 59<\/td>\n | 6.2.2 Test plate (panel) construction Figure\u00a03 \u2013 Test plate with sensors (calorimeters in mounting boards) <\/td>\n<\/tr>\n | ||||||
| 60<\/td>\n | 6.2.3 Sensor construction 6.2.4 Sensor response 6.3 Garment box test procedure 6.3.1 Arrangement of the garment box test procedure 6.3.2 Mannequin construction <\/td>\n<\/tr>\n | ||||||
| 61<\/td>\n | 6.4 Electric supply and electrodes 6.4.1 Test circuit 6.4.2 Test circuit control 6.4.3 Electrodes 6.4.4 Fuse wire <\/td>\n<\/tr>\n | ||||||
| 62<\/td>\n | 6.5 Electric test arc characteristics 6.6 Measurement and data acquisition system 7 Operator safety <\/td>\n<\/tr>\n | ||||||
| 63<\/td>\n | 8 Specimen preparation 8.1 Description of the test specimens 8.1.1 Test specimens for material box test procedure 8.1.2 Test specimens for garment box test procedure 8.2 Pre-treatment by cleaning 8.3 Pre-conditioning of the test specimens 9 Calibration 9.1 Data acquisition system pre-calibration 9.2 Calorimeter calibration check <\/td>\n<\/tr>\n | ||||||
| 64<\/td>\n | 9.3 Arc exposure calibration 9.4 Calibration of the electric test circuit and testing Tables Table\u00a01 \u2013 Test validity check range of direct exposure incident energy (permissible direct exposure incident energy range) <\/td>\n<\/tr>\n | ||||||
| 65<\/td>\n | 9.5 Confirmation of test apparatus setting 9.6 Preparing and conditioning of the box 10 Apparatus care and maintenance 10.1 Surface reconditioning of the sensors Table\u00a02 \u2013 Test validity check range of arc energy (permissible arc energy range) <\/td>\n<\/tr>\n | ||||||
| 66<\/td>\n | 10.2 Care of test plate and mannequin 10.3 Care of electrodes 11 Test procedures 11.1 Test parameters 11.2 Number of tests Table\u00a03 \u2013 Test parameters for Classes 1 and 2 <\/td>\n<\/tr>\n | ||||||
| 67<\/td>\n | 11.3 Test conditions and initial temperature 11.4 Specimen mounting 11.4.1 Material box test procedure 11.4.2 Garment box test procedure 11.5 Specimen description <\/td>\n<\/tr>\n | ||||||
| 68<\/td>\n | 12 Interpretation of results 12.1 Heat transfer 12.1.1 Determining time zero 12.1.2 Plotting sensor response 12.1.3 Incident energy Ei 12.1.4 Sensor response versus Stoll curve 12.2 Visual inspection <\/td>\n<\/tr>\n | ||||||
| 69<\/td>\n | 12.3 Test result 12.3.1 Acceptance criteria of material box test procedure 12.3.2 Acceptance criteria of garment box test procedure Table\u00a04 \u2013 Acceptance criteria for tests on materials Table\u00a05 \u2013 Acceptance criteria for tests on garments <\/td>\n<\/tr>\n | ||||||
| 70<\/td>\n | 13 Test report <\/td>\n<\/tr>\n | ||||||
| 71<\/td>\n | Annex A (informative) Precision of the test method Table\u00a0A.1 \u2013 Repeatability and reproducibility values of test procedure <\/td>\n<\/tr>\n | ||||||
| 72<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Tracked Changes. Live working. Protective clothing against the thermal hazards of an electric arc – Test methods. Method 2: Determination of arc protection class of material and clothing by using a constrained and directed arc (box test)<\/b><\/p>\n |