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Motor control centers are a modern technique in factory assembly for several motor starters. This machinery can comprise programmable controllers, metering and variable frequency drives. The MCC's are normally found in the electrical service entrance for a building. Motor control centers frequently are used for low voltage, 3-phase alternating current motors that range from 230 volts to 600 volts. Medium voltage motor control centers are designed for big motors that vary from 2300 volts to 15000 volts. These units utilize vacuum contractors for switching with separate compartments so as to accomplish power control and switching.
In places where very dusty or corrosive processes are happening, the motor control center can be installed in a separate air-conditioned room. Usually the MCC would be positioned 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, really large controllers can be bolted into place, whereas 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 be able to protect the motor, fuses or circuit breakers to supply short-circuit protection as well as a disconnecting switch to be able to isolate the motor circuit. Separate connectors allow 3-phase power to be able to enter the controller. The motor is wired to terminals located inside the controller. Motor control centers offer wire ways for power cables and field control.
Inside a motor control center, every motor controller could be specified with lots of various choices. Some of the choices comprise: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and numerous types of solid-state and bi-metal overload protection relays. They even have different classes of kinds of circuit breakers and power fuses.
