Masterpact MTZ—Industrial Environments

Masterpact MTZ devices can operate in the industrial environments defined by IEC 60947 (pollution degree up to 3).

Check that devices are installed in suitably cooled switchboards without excessive dust.



Corrosive industrial atmospheres

Category 3C3 compliant with IEC 60721-3-3

Sea salts 0.8 to 8 mg/m² day average over the year

Compliant with IEC 60721-2-5

Mechanically active substances

Category 3S3 compliant with IEC 60721-3-3

Beyond these conditions, Masterpact MTZ devices must be installed inside switchboards with an IP rating equal to or greater than IP54.

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