ISO7741: How higher altitude affect VIOTM /VIMP , other insulation spec.

Amber Si

Part Number: ISO7741

Tool/software:

Hi team,

I found VIOTM /VIMP and other insulation spec don't have been marked altitude info. May I know if higher altitude will affect insulation spec. like VIOTM /VIMP spec.

Amber

5 months ago

0 Saleem Marwat 5 months ago

TI__Genius 11095 points

Hi Amber,

The altitude is <=2000m for VDE, TUV, and CSA certifications while it is <=5000m for CQC certification. So for VDE, TUV, and CSA, VIOTM/VIMP ratings have to be adjusted / corrected if specific application's altitude is higher than 2000m.

Thanks,
Saleem Marwat

0 Amber Si 5 months ago in reply to Saleem Marwat

TI__Intellectual 1720 points

Hi Saleem,

Thanks, so can we offer VIOTM/VIMP ratings on higher altitude >5000m for customer?

Amber

0 Saleem Marwat 5 months ago in reply to Amber Si

TI__Genius 11095 points

Hi Amber,

In the IEC standards, I've seen clearance correction factors for altitudes (up to) <=5000m. I've not seen altitudes >5000; does your application require altitude >5000m?

Thanks,
Saleem Marwat

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ISO7741: How higher altitude affect VIOTM /VIMP , other insulation spec.