User manual 09/2009 - Schneider Electric

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User manual 09/2009 - Schneider Electric

The Protection FunctionThermal MemoryMicrologic 6 E-M trip units incorporate a thermal memory which ensures that the conductors are cooledeven after tripping: cooling lasts for 20 minutes before or after tripping.Cooling FanBy default, the motor’s thermal image is calculated taking account of the fact that the motor is self-cooled(fan mounted on the shaft end).If the motor is force-cooled (forced ventilation), the calculation of the thermal image takes account of theshortest time constants for the cooling calculation.The cooling ventilation parameters (Auto or moto position) are set on the Micrologic trip unit keypad orusing the RSU software.LV434104 09/2009 61

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