Page 191 - PortWest

INTERNATIONAL
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.

FR706
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.

BOX TEST METHOD IEC
61482-1-2

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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