Live working - Protective clothing against the thermal hazards of an electric arc - Part 1-1: 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

IEC 61482-1-1:2019 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.
This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- addition of the Incident energy limit (ELIM) as a further arc rating performance property value;
- replacement of char length requirement in the scope by indication that Procedure A is applicable for testing of materials meeting the limited flame spread requirements of IEC 61482-2;
- clarification of the definition and the meaning of the Stoll curve;
- modification of specification of positioning of monitor sensors with respect to the electric arc as function of intended high incident energy exposure of test specimens;
- modification of specifications of monitor sensor construction;
- specification of black paint;
- elimination of calorimeters from the chest of the mannequin;
- specification for possible positioning of mannequin(s) at a height different from the centre of the electric arc and possible turning in order to adequately expose all parts of the garment or clothing which would affect performance;
- more explicit description of requirements for data acquisition system;
- preconditioning of the samples;
- modification of requirements for apparatus and arc exposure verification by bare shots;
- more explicit description of test procedures A and B, in particular the subclauses dealing with “sequence of test”, “test parameter” and “test criteria”;
- addition of determination of arc rating values of garments and/or garmet assemblies.
Key words: Protective Clothing, Thermal Hazards, Open Arc, Arc Rating

Travaux sous tension - Vêtements de protection contre les dangers thermiques d'un arc électrique - Partie 1-1: Méthodes d’essai - Méthode 1: Détermination de la valeur assignée d’arc (ELIM, ATPV et/ou EBT) des matériaux pour vêtements et des vêtements de protection utilisant un arc ouvert

IEC 61482-1-1: 2019 définit des procédures d’essai permettant de déterminer la valeur assignée d’arc des matériaux pour vêtements et des articles d’habillement ou assemblages d’articles d’habillement résistant à la flamme, destinés à être utilisés dans les vêtements pour travailleurs en cas de danger d’arc électrique.
Un arc ouvert dans des conditions de laboratoire contrôlées permet de déterminer les valeurs de l’ELIM, de l’ATPV ou de l’EBT des matériaux, articles d’habillement ou assemblages d’articles d’habillement.
NOTE 1 L’utilisateur peut, s’il le souhaite, classer les performances de protection d’arc en niveaux de protection des valeurs assignées d’arc sur la base des valeurs ELIM, ATPV et/ou EBT qui correspondent le mieux aux différents niveaux de danger et de risque, que l’analyse du risque par l'utilisateur peut produire.
NOTE 2 Le présent document n’a pas pour objet la répartition des performances de protection d’arc des matériaux et des vêtements en classes de protection d’arc. L’IEC 61482 1-2, qui utilise un arc contraint pour les essais, spécifie des procédures de détermination de ces classes de protection d’arc APC1 et APC2.
NOTE 3 Cette méthode d’essai n’est ni destinée ni appropriée à l'évaluation du caractère de résistance à la flamme ou non des matériaux ou des articles d’habillement puisque cela est couvert par l’IEC 61482-2.
Le présent document ne couvre pas les effets autres que thermiques d’un arc électrique, comme le bruit, les émissions lumineuses, l’augmentation de la pression, l’huile chaude, le choc électrique, les conséquences d’un choc physique ou mental ou des effets toxiques.
Le présent document ne couvre pas les vêtements de protection utilisés pour réaliser des travaux utilisant intentionnellement un arc électrique, par exemple un soudage à l’arc, une torche à plasma.
Cette deuxième édition annule et remplace la première édition parue en 2009. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout de la limite d’énergie incidente (ELIM – Energy Limit) comme valeur de propriété supplémentaire relative à l’application de la valeur assignée d’arc;
- remplacement dans le domaine d’application de l’exigence concernant la longueur de carbonisation par une indication de l’applicabilité de la procédure A pour l'essai des matériaux satisfaisant aux exigences concernant la propagation limitée de flamme spécifiées dans l’IEC 61482-2;
- clarification de la définition et de la signification de la courbe de Stoll;
- modification de la spécification de placement des capteurs de surveillance par rapport à l’arc électrique en fonction de l’exposition des éprouvettes d'essai à une énergie incidente élevée;
- modification des spécifications de constitution des capteurs de surveillance;
- spécification de la peinture noire;
- suppression des calorimètres de la poitrine du mannequin;
- spécification du placement possible du ou des mannequins à une hauteur différente par rapport au centre de l’arc électrique et de la rotation possible permettant une exposition appropriée de toutes les parties de l’article d’habillement ou du vêtement qui altèrent les performances;
- description plus explicite des exigences concernant le système d'acquisition de données;
- préconditionnement des échantillons;
- modification des exigences concernant la vérification de l’appareil et de l’exposition à l’arc par des tirs à blanc;
- description plus explicite des procédures d'essai A et B, notamment les paragraphes qui traitent de la «séquence d’essai», du «paramètre d'essai» et des «critères d’essai»;
- ajout de la détermination des valeurs assignées d’arc des articles d’habillement et/ou des assemblages d'articles d’habillement.
Mots clés: Vêtements de protection, dangers thermiques, arc ouvert, valeur assignée d’arc

General Information

Status
Published
Publication Date
02-Jul-2019
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
03-Jul-2019
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IEC 61482-1-1:2019 - Live working - Protective clothing against the thermal hazards of an electric arc - Part 1-1: 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
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IEC 61482-1-1
Edition 2.0 2019-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside

Live working – Protective clothing against the thermal hazards of an electric arc –

Part 1-1: 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
Travaux sous tension – Vêtements de protection contre les dangers thermiques
d’un arc électrique –
Partie 1-1: Méthodes d’essai – Méthode 1: Détermination de la valeur assignée
d’arc (ELIM, ATPV et/ou EBT) des matériaux pour vêtements et des vêtements de
protection utilisant un arc ouvert
IEC 61482-1-1:2019-07(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61482-1-1
Edition 2.0 2019-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside

Live working – Protective clothing against the thermal hazards of an electric arc –

Part 1-1: 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
Travaux sous tension – Vêtements de protection contre les dangers thermiques
d’un arc électrique –
Partie 1-1: Méthodes d’essai – Méthode 1: Détermination de la valeur assignée
d’arc (ELIM, ATPV et/ou EBT) des matériaux pour vêtements et des vêtements de
protection utilisant un arc ouvert
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 13.220.40; 29.260.99 ISBN 978-2-8322-6921-3

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61482-1-1:2019 © IEC 2019
CONTENTS

FOREWORD ........................................................................................................................... 5

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms, definitions, symbols and units .............................................................................. 8

3.1 Terms and definitions .............................................................................................. 8

3.2 Symbols and units................................................................................................. 13

4 Principle of test procedures A and B .............................................................................. 13

4.1 Procedure A – Material open arc test procedure ................................................... 13

4.2 Procedure B – Garment open arc test procedure................................................... 14

5 Significance and use of the test procedures A and B ..................................................... 14

5.1 General ................................................................................................................. 14

5.2 Procedure A – Material open arc test procedure ................................................... 15

5.3 Procedure B – Garment open arc test procedure................................................... 15

6 Test apparatus .............................................................................................................. 15

6.1 General ................................................................................................................. 15

6.2 Calorimetric sensors ............................................................................................. 15

6.2.1 Calorimeter construction ................................................................................ 15

6.2.2 Panel sensor construction.............................................................................. 17

6.2.3 Monitor sensor construction and positioning .................................................. 19

6.3 Panel construction ................................................................................................ 20

6.4 Mannequin construction ........................................................................................ 22

6.5 Arrangement of panels and monitor sensors for testing according to

Procedure A .......................................................................................................... 23

6.6 Arrangement of mannequin(s) and monitor sensors for testing according to

Procedure B .......................................................................................................... 24

6.7 Supply bus and electrodes .................................................................................... 28

6.7.1 General ......................................................................................................... 28

6.7.2 Structural cage arrangement .......................................................................... 28

6.7.3 Electrodes ..................................................................................................... 30

6.7.4 Fuse wire ....................................................................................................... 30

6.8 Electric supply ...................................................................................................... 30

6.9 Test-circuit control ................................................................................................ 31

6.10 Data acquisition and data processing system ........................................................ 31

6.10.1 General ......................................................................................................... 31

6.10.2 Data acquisition ............................................................................................. 31

6.10.3 Signal synchronization ................................................................................... 32

7 Operator safety .............................................................................................................. 32

8 Specimen preparation .................................................................................................... 33

8.1 Description of the test specimens ......................................................................... 33

8.1.1 Test specimens for Procedure A .................................................................... 33

8.1.2 Test specimens for Procedure B .................................................................... 33

8.2 Pre-treatment of test specimens by cleaning ......................................................... 34

8.3 Pre-conditioning of the test specimens .................................................................. 34

9 Calibration and verification ............................................................................................ 34

9.1 Data acquisition system pre-calibration ................................................................. 34

9.2 Verification of calorimeters .................................................................................... 34

---------------------- Page: 4 ----------------------
IEC 61482-1-1:2019 © IEC 2019 – 3 –
9.3 Arc exposure and apparatus verification for the two-sensor panels and the

monitoring sensors................................................................................................ 35

9.3.1 Set-up of electrodes and fuse wire ................................................................. 35

9.3.2 Positioning of the two-sensor panels, mannequins and monitor sensors ........ 35

9.3.3 Verification bare shot ..................................................................................... 35

9.3.4 Verification bare shot test protocol ................................................................. 36

10 Test apparatus care and maintenance ........................................................................... 36

10.1 Surface reconditioning .......................................................................................... 36

10.2 Care of panels, mannequins and sensors .............................................................. 37

10.3 Care of electrodes ................................................................................................ 37

11 Test procedures ............................................................................................................ 37

11.1 Procedure A – testing with panels ......................................................................... 37

11.1.1 Test parameter and settings .......................................................................... 37

11.1.2 Sequence of tests with test specimens of material or material assembly ........ 37

11.1.3 Criteria for set of data obtained from iterative process of test shots ............... 38

11.2 Procedure B – testing with mannequins ................................................................ 39

11.2.1 Test parameters and settings ......................................................................... 39

11.2.2 Single test or sequence of tests with test specimen(s) of garment or

garment assembly ......................................................................................... 39

11.3 Air ventilation and initial temperature of sensors ................................................... 40

11.4 Specimen mounting .............................................................................................. 40

11.4.1 Procedure A – testing with panels .................................................................. 40

11.4.2 Procedure B – testing with mannequins ......................................................... 40

11.5 Specimen description ............................................................................................ 42

11.6 Test protocol ......................................................................................................... 42

12 Test results ................................................................................................................... 43

12.1 Heat calculation .................................................................................................... 43

12.1.1 General ......................................................................................................... 43

12.1.2 Copper heat capacity ..................................................................................... 43

12.1.3 Incident and transmitted energy ..................................................................... 43

12.1.4 Panel sensor response (transmitted energy (E ) comparison with Stoll

curve) ............................................................................................................ 44

12.1.5 Monitor sensor responses (incident energy (E )) ............................................ 45

12.2 Determination of arc thermal performance value (ATPV) ........................................ 46

12.3 Determination of breakopen threshold energy (EBT) .............................................. 46

12.4 Determination of the incident energy limit (ELIM) .................................................. 47

12.5 Visual inspection ................................................................................................... 47

12.6 Arc rating .............................................................................................................. 49

12.6.1 Arc rating of a material or material assembly ................................................. 49

12.6.2 Arc rating of a garment or garment assembly ................................................. 49

13 Test report ..................................................................................................................... 50

13.1 Reporting requirements common for tests according to Procedures A and B ......... 50

13.2 Reporting requirements specific for tests according to Procedure A ...................... 51

13.3 Reporting requirements specific for tests according to Procedure B ...................... 52

Annex A (informative) Logistic regression technique ............................................................ 54

Annex B (informative) 95 % confidence intervals of ATPV and EBT ....................................... 56

Annex C (informative) Iterative process of test shots of Procedure A ................................... 60

Annex D (informative) Example materials for insulating and mounting boards ...................... 61

---------------------- Page: 5 ----------------------
– 4 – IEC 61482-1-1:2019 © IEC 2019

D.1 General ................................................................................................................. 61

D.2 Materials for use as thermally insulating mounting board (6.2) .............................. 61

D.3 Materials for use as mounting board, but not sufficiently thermally insulating

for use as insulating board (6.3) ............................................................................ 62

Annex E (informative) Recommended provisions for use of the test method for

accident replication and for research .................................................................................... 63

Bibliography .......................................................................................................................... 64

Figure 1 – Example of calorimeter construction ..................................................................... 17

Figure 2 – Example of the panel sensor construction ............................................................ 18

Figure 3 – Example of monitor sensor construction, with optional cover plate ....................... 19

Figure 4 – Panel ................................................................................................................... 21

Figure 5 – Example of material clamping assembly of a panel .............................................. 22

Figure 6 – Arrangement of three two-sensor panels with monitoring sensors (top view)

for testing according to Procedure A ..................................................................................... 24

Figure 7 – Relative positioning of arc electrodes and of mannequin(s) and monitor

sensors for testing according to Procedure B ........................................................................ 25

Figure 8 – Examples of mannequin configuration .................................................................. 27

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) ......................................................................................................... 29

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 ...................................................................................................................... 30

Figure 11 – Typical average transmitted energy curves Q (i.e. average response
t,avg

of the two sensors of same panel) for test specimens ........................................................... 45

Figure B.1 – Probability density function (PDF) ..................................................................... 56

Figure B.2 – Cumulative density (CDF) ................................................................................. 57

Figure B.3 – Graph with probability, lower and upper limits ................................................... 59

Table 1 – Positioning of monitor sensors depending on incident energy exposure ................. 20

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 ................................................................... 47

Table 3 – Visual assessment criteria in case of testing garment(s) or a garment

assembly according to Procedure B ...................................................................................... 50

Table B.1 – Example of incident energy X and binary response Y (fulfillment of Stoll

criteria) for 21 test shots ....................................................................................................... 58

---------------------- Page: 6 ----------------------
IEC 61482-1-1:2019 © IEC 2019 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LIVE WORKING –
PROTECTIVE CLOTHING AGAINST
THE THERMAL HAZARDS OF AN ELECTRIC ARC –
Part 1-1: 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
FOREWORD

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indispensable for the correct application of this publication.

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rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61482-1-1 has been prepared by IEC technical committee 78: Live

working.

This second edition cancels and replaces the first edition published in 2009. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

– addition of the Incident energy limit (ELIM) as a further arc rating performance property

value;

– replacement of char length requirement in the scope by indication that Procedure A is

applicable for testing of materials meeting the limited flame spread requirements of

IEC 61482-2;
---------------------- Page: 7 ----------------------
– 6 – IEC 61482-1-1:2019 © IEC 2019
– clarification of the definition and the meaning of the Stoll curve;

– modification of specification of positioning of monitor sensors with respect to the electric arc

as function of intended high incident energy exposure of test specimens;
– modification of specifications of monitor sensor construction;
– specification of black paint;
– elimination of calorimeters from the chest of the mannequin;

– specification for possible positioning of mannequin(s) at a height different from the centre

of the electric arc and possible turning in order to adequately expose all parts of the garment

or clothing which would affect performance;
– more explicit description of requirements for data acquisition system;
– preconditioning of the samples;

– modification of requirements for apparatus and arc exposure verification by bare shots;

– more explicit description of test procedures A and B, in particular the subclauses dealing

with “sequence of test”, “test parameter” and “test criteria”;

– addition of determination of arc rating values of garments and/or garment assemblies.

The text of this International Standard is based on the following documents:
FDIS Report on voting
78/1256/FDIS 78/1262/RVD

Full information on the voting for the approval of this International Standard can be found in the

report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

In this standard terms defined in Clause 3 appear in italics.

A list of all parts in the IEC 61482 series, published under the general title Live working –

Protective clothing against the thermal hazards of an electric arc, can be found on the IEC

website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct understanding

of its contents. Users should therefore print this document using a colour printer.

---------------------- Page: 8 ----------------------
IEC 61482-1-1:2019 © IEC 2019 – 7 –
LIVE WORKING –
PROTECTIVE CLOTHING AGAINST
THE THERMAL HAZARDS OF AN ELECTRIC ARC –
Part 1-1: 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
1 Scope

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 ele
...

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