MCC CUM AC Drives Panel

A few plants may not be able to keep separate lines up with respect to motor control and speed control. There are also fixed cable routes, limited room, and both types of operation are in one place. Our MCC CUM AC Drives Panels are designed to meet the combined requirement of a conventional motor feeder and a variable frequency drive located within the same enclosure without creating either thermal or electrical problems with wiring.

When designing and constructing the feeders, we review the motor list, load profile, ventilation, and harmonic impact prior to arranging the feeders. Fixed speed starters and motors controlled by variable frequency drives are separated within the cabinet to prevent the heat from the variable frequency drives from affecting other contactor sections. Busbars are sized to allow for the simultaneous operation of multiple motors or motors driven by variable frequency drives coupled with the input current from the VFDs. Adequate space will also be provided for the termination of the VFD cables and the proper bending radius for the insulated (shielded) motor cables will be adhered to.

Designing the layout for Control Supply Distribution, Access for Drive Bypass (or as necessary), and Interlocking Between Local and Remote Commands is part of the design stage. Indications have been installed to allow all operators to determine if a motor is being powered by either Direct Start or through the Drive without opening any of the compartments.

Our test procedures include checking each feeder operation, the Drive Communication, the Speed Reference Response, and Protection Coordination. These MCC CUM AC Drives Panels are supplied to projects across the US for projects with a range of motors in which compact installations, controlled starting, energy-saving operations, and easy access for maintenance within a single vertical line-up are essential components.