A motor control center (MCC) is an assembly to control some or all electric motors in a central location. It consists of multiple enclosed sections having a common power bus and with each section containing a combination starter, which in turn consists of motor starter, fuses or circuit breaker, and power disconnect.
PCC is power control centre. In simple terms or generally a panel which supplies or received H.T power can be termed as PCC whereas panels which supplies power to L.T motors I.e those running on less than 415 volts are termed as MCC.
Variable frequency drive control panel (also named VFD panel, AC drive electrical control panel) is consisted of inner VFD inside the cabinet with external control, protect, display and other electrical, it's an frequency conversion device to control three phase AC motor (including fans and pumps) in variable speed to save energy.
To step down the 33kV primary voltage to 11kV suitable for distribution purpose. One 33kV/0.415 auxiliary transformer was also needed to supply the substation with reliable AC power.
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