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Motor control centers are a modern technique in factory assembly for several motor starters. This particular machine can consist of programmable controllers, metering and variable frequency drives. The MCC's are usually utilized in the electrical service entrance for a building. Motor control centers often are used for low voltage, 3-phase alternating current motors that vary from 230 V to 600V. Medium voltage motor control centers are made for large motors that vary from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments to be able to attain power switching and control.
Inside factory locations and area which have dusty or corrosive processing, the MCC can be installed in climate controlled separated locations. Usually the MCC will be situated on the factory floor near the machinery it is controlling.
A MCC has one or more vertical metal cabinet sections with power bus and provisions for plug-in mounting of individual motor controllers. Smaller controllers could be unplugged from the cabinet to complete maintenance or testing, whereas really large controllers can be bolted in place. Every motor controller has a contractor or a solid state motor controller, overload relays to protect the motor, circuit breaker or fuses to supply short-circuit protection as well as a disconnecting switch so as to isolate the motor circuit. Separate connectors enable 3-phase power to enter the controller. The motor is wired to terminals situated within the controller. Motor control centers provide wire ways for power cables and field control.
Every motor controller within a motor control center could be specified with several choices. These alternatives comprise: separate control transformers, extra control terminal blocks, control switches, pilot lamps, as well as many types of bi-metal and solid-state overload protection relays. They likewise comprise various classes of types of power fuses and circuit breakers.
