0614CT1701

Ambient Temperature

Masterpact MTZ devices are designed to operate in ambient temperature between -25°C (-13°F) and +70°C (+158°F), providing that the temperature around the circuit breaker inside the enclosure does not exceed +70°C (+158°F). If this condition cannot be fulfilled, dedicated measures such as HVAC must be taken.

Masterpact MTZ devices have successfully passed the tests defined by the following standards for extreme atmospheric conditions:

  • Dry cold at -40°C (-40°F) (IEC 60068-2-1)

  • Dry heat at +85°C (+185°F) (IEC 60068-2-2)

  • Damp heat (temperature +55°C (+131°F), relative humidity 95%) (IEC 60068-2-30)

Masterpact MTZ Circuit Breakers Ambient Temperatures

Shipping & Storage

Installation & Commisioning

Inside the Electrical Equipment Containing the Circuit Breaker

Temperature

Relative Humidity

Temperature

Relative Humidity

Temperature

Relative Humidity

-40°C / +85°C
(-40°F / +185°F)

0 to 95%

-25°C / +70°C
(-13°F / +158°F)

0 to 95%

-25°C / +70°C
(-13°F / +158°F)*

0 to 95%

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