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Motor control centers are a modern technique in factory assembly for some motor starters. This 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 range from 230 V to 600V. Medium voltage motor control centers are intended for large motors which range from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments to be able to achieve power switching and control.
Inside factory locations and area that have corrosive or dusty processing, the MCC can be installed in climate controlled separated locations. Usually the MCC would be positioned on the factory floor adjacent to the machines it is controlling.
A MCC has one or more vertical metallic cabinet sections with power bus and provisions for plug-in mounting of individual motor controllers. Smaller controllers could be unplugged from the cabinet so as to complete maintenance or testing, whereas really big controllers can be bolted in place. Every motor controller has a contractor or a solid state motor controller, overload relays In order to protect the motor, circuit breaker or fuses to provide short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors enable 3-phase power to be able to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers provide wire ways for power cables and field control.
Within a motor control center, each and every motor controller could be specified with many various alternatives. Some of the options comprise: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many kinds of bi-metal and solid-state overload protection relays. They likewise comprise various classes of types of power fuses and circuit breakers.
