| IEC 61482-1-2: Protection against the Thermal Hazards of an Electric Arc (Box Test) |
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This standard sets out the specifications for materials and clothing designed to protect the wearer from the risks associated with electric arcs.
Two categories of protection are available:
Class 1:
Electric arc lasting time = 0.5 second, applied current = 4kA
Class 2:
Electric arc lasting time = 0.5 second, applied current = 7kA |
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| Only when fulfill all the requirements below can claim to be in compliance with ENIEC 61482-1-2 |
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| Applied electric arc current |
4kA (Class 1) |
| Arc duration |
500ms |
| Voltage of open test circuit |
400V |
| Copper/aluminium electrodes |
Electrodes gap 30mm |
| Electrodes distance to sample |
300mm |
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EN IEC61482-1-2 規定
Assessment: |
| EN 61482-1-2 Requirements |
sample 1 |
sample 2 |
sample 3 |
sample 4 |
| Burning time ≤ 5s |
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| No melting through to the inner side |
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| No hole bigger than 5mm in any direction (in the innermost layer) |
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| All eight heat flux results below corresponding Stoll values |
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| Property |
sample 1 |
sample 2 |
sample 3 |
sample 4 |
| Burning time, s |
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| Melting through to the inner side |
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| Hole formation > 5mm |
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| Embrittlement |
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| Embrittlement on the outside |
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| Charring on the outside |
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| Dripping |
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| Shrinkage |
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| Transmitted incident energy Eit (both calorimeters), kJ/m2 |
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Time to maximum temp rise
Tmax(both calorimeters), s(s) |
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| Comparison: Maximum incident energy allowed to avoid second- degree burn (both calorimeters), kJ/m2 |
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| Maximum temperature rise ∆ Tp (both calorimeters), °C |
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| Comparison: Maximum temperature rise allowed to avoid second-degree burn (both calorimeters), °C |
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