Industrial Environmental Atmospheric Conditions

Masterpact MTZ devices have successfully passed the tests defined by IEC 60068-2-52 level 2: salt mist for extreme atmospheric conditions:

Masterpact devices can operate in the industrial environments defined by standard IEC/EN 60947-1 (pollution degree up to 3).

It is nevertheless advised to check that the devices are installed in suitably cooled electrical equipment without excessive dust.



Active Substances

Corrosive industrial atmospheres

Category 3C3 compliant with IEC 60721-3-3


Sea salts

Compliant with IEC 60721-2-5

0.8 to 8 mg/(m2. day)
Average over the year

Mechanically active substances

Category 3S3 compliant with IEC 60721-3-3


Beyond these conditions, Masterpact MTZ devices must be installed inside electrical equipment with an enclosure rating equal to or greater than a NEMA 13 rating.

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