IEC CEI EN 62271-200 Norm

Internal arc

Designation of the classification IAC

In the case where the classification IAC is established from tests, the switchboard will be designated in the following way:

- General: classification IAC (initials for "Internal Arc Classified")

- Accessibility: (A) (B) (C)

- Values Test: Test current in kilo-amperes (kA), duration in seconds (s).

Example 1: the framework tested with a fault current of 12.5 KA, for 0.5 s for installation in a public place (B) and tested with the indicators on the front, sides and back of the picture, will be designated as follows:

classification IAC BFLR, arc 12.5 kA 0,5 s

Example 2: the framework tested with a fault current of 16 KA for 1 s, for installation on a site with access only to authorized personnel (A), tested with indicators on the front and on the sides of the picture, will be designated as follows:

classification IAC AFL, arc 16 kA 1 s

Note: accessibility (C) applies to equipment installed on a pole

example: IAC AFLR 16kA 1s

A = Class of accessibility (in this case for authorized personnel)

FLR =
F = protection on the front

L = lateral protection

R = rear protection

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