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Motor control centers are a modern technique in factory assembly for several motor starters. This machine could include programmable controllers, metering and variable frequency drives. The MCC's are usually used in the electrical service entrance for a building. Motor control centers often are utilized for low voltage, 3-phase alternating current motors that vary from 230 V to 600V. Medium voltage motor control centers are intended for big motors that vary from 2300 volts to 15000 volts. These units use vacuum contractors for switching with separate compartments so as to accomplish power switching and control.
Inside factory area and locations which have dusty or corrosive processing, the MCC can be installed in climate controlled separated locations. Typically the MCC would be situated on the factory floor close to the machinery 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 may be unplugged from the cabinet to complete maintenance or testing, whereas really big controllers can be bolted in place. Every motor controller consists of a solid state motor controller or a contractor, overload relays to be able to protect the motor, circuit breaker or fuses in order to supply short-circuit protection as well as a disconnecting switch in order to isolate the motor circuit. Separate connectors allow 3-phase power to enter the controller. The motor is wired to terminals located within the controller. Motor control centers provide wire ways for power cables and field control.
Inside a motor control center, every motor controller can be specified with numerous various choices. Some of the choices include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and numerous kinds of bi-metal and solid-state overload protection relays. They also have various classes of kinds of circuit breakers and power fuses.
