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Motor control centers are a modern practice in factory assembly for some motor starters. This particular machinery could include programmable controllers, metering and variable frequency drives. The MCC's are normally found in the electrical service entrance for a building. Motor control centers commonly are utilized for low voltage, 3-phase alternating current motors which range from 230 V to 600V. Medium voltage motor control centers are intended for big motors that vary from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments so as to achieve power switching and control.
In factory area and locations that have dusty or corrosive processing, the MCC can be installed in climate controlled separated locations. Usually the MCC would be situated on the factory floor near the equipment it is controlling.
For plug-in mounting of individual motor controls, A motor control center has one or more vertical metal cabinet sections with power bus. So as to complete testing or maintenance, really large controllers could be bolted into place, while smaller controllers may be unplugged from the cabinet. Each and every motor controller has a contractor or a solid state motor controller, overload relays to protect the motor, fuses or circuit breakers to supply short-circuit protection as well as a disconnecting switch so as to isolate the motor circuit. Separate connectors allow 3-phase power so as to enter the controller. The motor is wired to terminals situated inside the controller. Motor control centers offer wire ways for field control and power cables.
Every motor controller inside a motor control center can be specified with several options. These choices consist of: control switches, pilot lamps, separate control transformers, extra control terminal blocks, as well as various types of bi-metal and solid-state overload protection relays. They even comprise different classes of types of power fuses and circuit breakers.
