PW Flame Resistant Range

ELECTRIC ARC FLASH

STANDARDS

IEC 61482-2 THERMAL HAZARDS OF AN ELECTRIC ARC

IEC 61482-2 protective clothing against the thermal arc hazards of an electric arc.

THE TEST The standard has 2 test methods, to comply with the standard either or both tests must be carried out.

PS55

MV70

THE RISK An Electric Arc and the resulting Arc Flash is the rapid and dangerous release of energy due to an electrical arcing fault. The extreme heat creates a large amount of thermal radiant energy and produces electrical shock. The risk occurs when working both at low and high voltage.

OPEN ARC METHOD IEC 61482-1-1

The open arc test method is used to determine the thermal insulating properties of a fabric when exposed to the energy of an electric arc. All results are in cal/cm² the higher the value, the greater the protection. There are 3 possible values determined during this test method:: ATPV is the maximum incident energy that protective garment can be exposed to before the wearer would have a 50% probability of 2nd degree burns. EBT is the incident energy on a material that results in a 50% probability of breakopen. ELIM (Incident Energy Limit): This value is the highest incident thermal energy to which the garment can be exposed with a 0% risk of the wearer getting a second-degree burn injury.

WHO IS AT RISK? Those working with and around low and high voltage electricity.

INJURIES Thermal burns, hearing loss, blindness, nerve damage, cardiac arrest, shrapnel injury (blast) and potential death.

BOX TEST METHOD IEC 61482-1-2

MV71

During the test the specimen is exposed to an electric arc, simulating typical exposure conditions for a short circuit current, confined in a box for 0.5 seconds.

• For APC 1, the specimen is exposed to a current of 4 kA (400 V, 168 kJ)

• For APC 2, the specimen is exposed to a current of 7 kA (400V, 320 kJ)

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