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Motor control centers are a modern practice in factory assembly for several motor starters. This particular equipment can consist of programmable controllers, metering and variable frequency drives. The MCC's are normally seen 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 volts to 600 volts. Medium voltage motor control centers are intended for big motors which range from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments in order to accomplish power control and switching.
Within factory area and locations that have corrosive or dusty processing, the MCC could be installed in climate controlled separated locations. Normally the MCC would be located 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. To be able to complete maintenance or testing, extremely big controllers can be bolted into place, while smaller controllers may be unplugged from the cabinet. Every motor controller consists of a contractor or a solid state motor controller, overload relays to protect the motor, circuit breaker or fuses so as to supply short-circuit protection as well as a disconnecting switch in order to isolate the motor circuit. Separate connectors enable 3-phase power to enter the controller. The motor is wired to terminals located inside the controller. Motor control centers provide wire ways for field control and power cables.
In a motor control center, each motor controller could be specified with numerous different choices. Some of the alternatives consist of: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and numerous kinds of bi-metal and solid-state overload protection relays. They likewise comprise different classes of kinds of power fuses and circuit breakers.
