Electrical unit for a motor control center with improved ventilation protection

摘要

Electrical units for a Motor Control Center (MCC) can be improved to provide ventilation for cooling elements of the unit while also providing better system protection by providing a combination of baffle assemblies and protective layers over openings providing the ventilation in doors of the units. The baffle assemblies can be configured to provide arc flash resistance for containing possible arc blasts within the units, and water intrusion resistance for protecting the units from possible water intrusion, while allowing substantial airflow. The protective layer, which could include a steel mesh and/or dust filter, can be configured to prevent solid objects above a certain size from passing through the opening allowing the airflow. As a result, airflow can be increased to cool elements of the unit while maintaining protections from arc flash, water intrusion and/or solid objects.