BS EN IEC 61482-1-1:2019
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Live working. Protective clothing against the thermal hazards of an electric arc – Test methods. Method 1: Determination of the arc rating (ELIM, ATPV and/or EBT) of clothing materials and of protective clothing using an open arc
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 70 |
This part of IEC 61482 specifies test method procedures to determine the arc rating of flame resistant clothing materials and garments or assemblies of garments intended for use in clothing for workers if there is an electric arc hazard.
An open arc under controlled laboratory conditions is used to determine the values of ELIM, ATPV or EBT of materials, garments or assemblies of garments.
NOTE 1 The user can, if he desires, classify the arc protective performance into arc rating protection levels based on ELIM, ATPV and/or EBT values which correspond best to the different hazard and risks levels that can result from the user’s risk analysis.
NOTE 2 This document is not dedicated to classifying the arc protective performance of the material and clothing into arc protection classes. Procedures determining these arc protection classes APC1 and APC2 are specified in IEC 61482-1-2, which uses a constrained arc for testing.
NOTE 3 This test method is not intended and not appropriate to evaluate whether materials or garments are flame resistant or not, as this is covered in IEC 61482-2.
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 document.
Protective clothing for work intentionally using an electric arc, e.g. arc welding, plasma torch, is not covered by this document.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 6 | English CONTENTS |
| 9 | FOREWORD |
| 11 | 1 Scope 2 Normative references |
| 12 | 3 Terms, definitions, symbols and units 3.1 Terms and definitions |
| 17 | 3.2 Symbols and units 4 Principle of test procedures A and B 4.1 Procedure A – Material open arc test procedure |
| 18 | 4.2 Procedure B – Garment open arc test procedure 5 Significance and use of the test procedures A and B 5.1 General |
| 19 | 5.2 Procedure A – Material open arc test procedure 5.3 Procedure B – Garment open arc test procedure 6 Test apparatus 6.1 General 6.2 Calorimetric sensors 6.2.1 Calorimeter construction |
| 21 | 6.2.2 Panel sensor construction Figures Figure 1 – Example of calorimeter construction |
| 22 | Figure 2 – Example of the panel sensor construction |
| 23 | 6.2.3 Monitor sensor construction and positioning Figure 3 – Example of monitor sensor construction, with optional cover plate |
| 24 | 6.3 Panel construction Tables Table 1 – Positioning of monitor sensors depending on incident energy exposure |
| 25 | Figure 4 – Panel |
| 26 | 6.4 Mannequin construction Figure 5 – Example of material clamping assembly of a panel |
| 27 | 6.5 Arrangement of panels and monitor sensors for testing according to Procedure A |
| 28 | 6.6 Arrangement of mannequin(s) and monitor sensors for testing according to Procedure B Figure 6 – Arrangement of three two-sensor panelswith monitoring sensors (top view) for testing according to Procedure A |
| 29 | Figure 7 – Relative positioning of arc electrodes and ofmannequin(s) and monitor sensors for testing according to Procedure B |
| 31 | Figure 8 – Examples of mannequin configuration |
| 32 | 6.7 Supply bus and electrodes 6.7.1 General 6.7.2 Structural cage arrangement |
| 33 | Figure 9 – Example of cage arrangement (supply bus, bus tubes and arc electrodes) shown together with three panels for testing according to Procedure A (monitor sensors are not shown) |
| 34 | 6.7.3 Electrodes 6.7.4 Fuse wire 6.8 Electric supply Figure 10 – Relative positioning of cage arrangement (supply bus, bus tubes and arc electrodes) and of one torso mannequin and its monitor sensors for testing according to Procedure B |
| 35 | 6.9 Test-circuit control 6.10 Data acquisition and data processing system 6.10.1 General 6.10.2 Data acquisition |
| 36 | 6.10.3 Signal synchronization 7 Operator safety |
| 37 | 8 Specimen preparation 8.1 Description of the test specimens 8.1.1 Test specimens for Procedure A 8.1.2 Test specimens for Procedure B |
| 38 | 8.2 Pre-treatment of test specimens by cleaning 8.3 Pre-conditioning of the test specimens 9 Calibration and verification 9.1 Data acquisition system pre-calibration 9.2 Verification of calorimeters |
| 39 | 9.3 Arc exposure and apparatus verification for the two-sensor panels and the monitoring sensors 9.3.1 Set-up of electrodes and fuse wire 9.3.2 Positioning of the two-sensor panels, mannequins and monitor sensors 9.3.3 Verification bare shot |
| 40 | 9.3.4 Verification bare shot test protocol 10 Test apparatus care and maintenance 10.1 Surface reconditioning |
| 41 | 10.2 Care of panels, mannequins and sensors 10.3 Care of electrodes 11 Test procedures 11.1 Procedure A – testing with panels 11.1.1 Test parameter and settings 11.1.2 Sequence of tests with test specimens of material or material assembly |
| 42 | 11.1.3 Criteria for set of data obtained from iterative process of test shots |
| 43 | 11.2 Procedure B – testing with mannequins 11.2.1 Test parameters and settings 11.2.2 Single test or sequence of tests with test specimen(s) of garment or garment assembly |
| 44 | 11.3 Air ventilation and initial temperature of sensors 11.4 Specimen mounting 11.4.1 Procedure A – testing with panels 11.4.2 Procedure B – testing with mannequins |
| 46 | 11.5 Specimen description 11.6 Test protocol |
| 47 | 12 Test results 12.1 Heat calculation 12.1.1 General 12.1.2 Copper heat capacity 12.1.3 Incident and transmitted energy |
| 48 | 12.1.4 Panel sensor response (transmitted energy (Et) comparison with Stoll curve) |
| 49 | 12.1.5 Monitor sensor responses (incident energy (Ei)) Figure 11 – Typical average transmitted energy curves Qt,avg (i.e. average response of the two sensors of same panel) for test specimens |
| 50 | 12.2 Determination of arc thermal performance value (ATPV) 12.3 Determination of breakopen threshold energy (EBT) |
| 51 | 12.4 Determination of the incident energy limit (ELIM) 12.5 Visual inspection Table 2 – Reporting requirements and rating of visual inspection performance in case of testing clothing material(s) according to Procedure A and garment(s) or an assembly of garments according to Procedure B |
| 53 | 12.6 Arc rating 12.6.1 Arc rating of a material or material assembly 12.6.2 Arc rating of a garment or garment assembly |
| 54 | 13 Test report 13.1 Reporting requirements common for tests according to Procedures A and B Table 3 – Visual assessment criteria in case of testing garment(s) or a garment assembly according to Procedure B |
| 55 | 13.2 Reporting requirements specific for tests according to Procedure A |
| 56 | 13.3 Reporting requirements specific for tests according to Procedure B |
| 58 | Annex A (informative)Logistic regression technique |
| 60 | Annex B (informative)95 % confidence intervals of ATPV and EBT Figure B.1 – Probability density function (PDF) |
| 61 | Figure B.2 – Cumulative density (CDF) |
| 62 | Table B.1 – Example of incident energy X and binary response Y (fulfillment of Stoll criteria) for 21 test shots |
| 63 | Figure B.3 – Graph with probability, lower and upper limits |
| 64 | Annex C (informative)Iterative process of test shots of Procedure A |
| 65 | Annex D (informative)Example materials for insulating and mounting boards D.1 General D.2 Materials for use as thermally insulating mounting board (6.2) |
| 66 | D.3 Materials for use as mounting board, but not sufficiently thermally insulating for use as insulating board (6.3) |
| 67 | Annex E (informative)Recommended provisions for use of the test methodfor accident replication and for research |
| 68 | Bibliography |
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BS EN IEC 61482-1-1:2019
Live working. Protective clothing against the thermal hazards of an electric arc – Test methods.…
