Aluminium compliance with IEC61439

[Sree_NN]

Good day to all,

Could you please clarify if  IEC 61439 recognizes Aluminium as a conductor?

If yes then what are the temperature rise criteria limits defined for aluminium to aluminium joints?

Thanks!

[NKhare · Accepted solution]

The IEC61439-1; edition 3 was published in May 2020 which recognizes Aluminium as conductor with well defined temperature rise criteria limits - 55K for untreated Aluminium to Aluminium Joints

However there will be no significant impact on the existing solutions that are complying to earlier edition 2 except on the temperature rise criteria's for Aluminium conductor. A maximum temperature-rise of 55 K for bare (uncoated) Aluminium busbars and conductors (Al-Al joint) shall not exceed, to ensure safety & performance of the solution over a prolonged duration of service.

Also attaching excerpts of IEC 61439 Ed. 3, Table 6 - Temperature-rise limits (9.2) for your ready reference.

Thanks,

Nitin Khare

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