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:
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Dry cold at -40°C (-40°F) (IEC 60068-2-1)
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Dry heat at +85°C (+185°F) (IEC 60068-2-2)
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Damp heat (temperature +55°C (+131°F), relative humidity 95%) (IEC 60068-2-30)
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Masterpact MTZ Circuit Breakers Ambient Temperatures |
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Shipping & Storage |
Installation & Commisioning |
Inside the Electrical Equipment Containing the Circuit Breaker |
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Temperature |
Relative Humidity |
Temperature |
Relative Humidity |
Temperature |
Relative Humidity |
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-40°C / +85°C |
0 to 95% |
-25°C / +70°C |
0 to 95% |
-25°C / +70°C |
0 to 95% |