IEC 61482-2 Standard | Arc Flash & Protective Clothing Standards
Published 09 Sep 2021
Arc Flash & Protective Clothing Standards
IEC 61482-2 Standard is an International Electrotechnical Commission standard regarding live working – protective clothing against the thermal hazards of an electric arc. Arc flash protection garment style is carefully designed to offer the maximum protection in regards to IEC 61482 standards whilst ensuring comfort and outstanding durability.
As arc flash garments come under the requirements of Category 3 Protective Clothing, these garments are manufactured under Article 11B Quality Control Procedures.
View further information about Arc Flash Clothing Standards.
What is an electric arc?
Electric Arc and the Arc Flash created is an extremely dangerous and least understood hazard of electricity. It occurs as a result of extreme discharges of voltage or electrical current from equipment including switchgear, transformers and heavy electrical equipment. The Arc generates a high level of energy for a very short span of time (up to 1 second). The intense heat can create temperatures as high as 19,000°C and it also produces electric shock, force and large quantities of thermal radiant energy.
What is the risk?
In any situation where your employees are working with electricity, an Arc Flash can occur and as such the maximum energy of default circuits in any electrical installation must be able to be determined. The risks of an electric Arc exposure are:
- Electrocution – potentially fatal
- Extremely high levels of Radiant Heat
- 1st, 2nd or 3rd Degree burns – 3rd Degree burns cause permanent damage
IEC 61482-2:2018 PERFORMANCE & DESIGN REQUIREMENTS
Performance requirements for materials and design requirements for garments, plus Marking and User Information.
This part of IEC 61482 is applicable to protective clothing used in work if there is an electric Arc hazard. This standard specifies requirements and test methods applicable to materials and garments for protective clothing worn by electrical workers to protect them against the thermal hazards of electric Arc based on relevant general properties of the textiles, tested with selected textile test methods, and one of the Test Methods as defined below.
IEC 61482-1-1:2019 ‘OPEN ARC’ TEST METHOD
‘Open Arc’ test method (ATPV test and garment test). This replaces IEC 61482-1:2002. The ‘Open Arc’ test method is the same as the original North American method for measuring the Arc Thermal Performance Value (ATPV), as used in ASTM F1959. Materials or assemblies are given an ATPV/EBT/ELIM value, expressed in kilojoules per square metre (kJ/m2), which can be converted into the familiar cal/cm². To learn more about the classification of cal ratings read our guide on the updated standard here.
IEC 61482-1-2:2007 ‘BOX ARC’ TEST METHOD
‘Box Arc’ test method (Fabric classification and garment test). The ‘Box Arc’ test method is based on the original European method described in ENV 50354, with a heat transfer measurement. Materials or assemblies are classified as Arc Protection Class (APC) 1 (4 kA) or APC 2 (7kA). During this test, a fabric sample is exposed to an electric Arc produced by a 4kA or 7kA short circuit. In the test, the Arc does not last any longer than 500ms. The amount of heat transmitted through the sample is measured during and after the test. On the basis of the resulting data and a Stoll curve, the length of time it would take to cause the onset of second-degree burns is subsequently determined. Samples are also assessed for after-flaming, hole formation, melting, etc.
GARMENT TESTING & FABRIC TESTING
It is important to note that not only the fabric should be tested for conformance to the Arc Flash Standard, but also the complete garment or garment assembly itself. The garment test is not testing for energetic value but is testing to ensure that the garment structure remains intact after the Arc exposure and that components such as zippers and buttons are still functional and do not contribute further injury to the wearer by melting or heat transfer.
IEC 61482-2 | Standard Overview
Protective Clothing. Thermal Hazards. Electric Arc & Arc Thermal Protection.
IEC 61482-2:2018 is applicable to protective clothing used in work where there is the risk of exposure to an electric arc hazard. This document specifies requirements and test methods applicable to materials and garments for protective clothing for electrical workers against the thermal hazards of an electric arc.
Electric shock hazard is not covered by this document, which is applicable in combination with standards covering such hazards. 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. Protection of eyes, face, head, hands and feet against electric arc hazard is not covered by this document.
Requirements and tests to cover electric arc hazards to these parts of the body are under development. 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: new definition for ELIM, ATPV and EBT as used in accordance with IEC 61482-1-1:–; new requirements for the thermal stability of the intermediate layers; additional material requirement for volume resistance; new test procedure for the thermal resistance of sewing threads and a new symbol for marking.
Standard Status | Current
Published | 2018
IEC 61482-2:2009 is applicable to protective clothing used in work if there is an electric arc hazard. Specifies requirements and test methods applicable to materials and garments for protective clothing for electrical workers against the thermal hazards of an electric arc based on:
– relevant general properties of the textiles, tested with selected textile test methods, and
– arc thermal resistance properties, such as:
- the arc rating of materials (ATPV or EBT50), when tested with an open electric arc under defined laboratory conditions according to IEC 61482-1-1, or
- the arc protection class of materials and garments (Class 1 or Class 2), when tested with a directed and constrained electric arc under defined laboratory conditions according to IEC 61482-1-2.
Clothing & Garments
Protecting Workers Against the Dangers of Arc Flash
Thorne & Derrick stock and supply the most extensive range of Arc Flash PPE, Clothing & Protective Garments – should you require any further information, sample garments for field test and trial or a quotation please do not hesitate to contact us.
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Thorne & Derrick International supply arc flash clothing and protection equipment including coveralls, gloves, helmets, face shields and general head-to-toe PPE is used to protect against flashover – complete range of insulating matting is also available for worker protection when exposed to energised electrical switchgear and transformers.
Typical applications include LV, HV & EHV cable jointing and terminating, fuse pulling, switchgear commissioning, racking circuit breakers, electrical switching and live working on medium and high voltage electricity networks.
T&D are national distributors LV, MV & HV Cable Installation, Jointing, Substation & Electrical Equipment – we service UK and global businesses involved in cable installations, cable cleating, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.
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