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Motor control centers are a modern method in factory assembly for several motor starters. This equipment could comprise variable frequency drives, programmable controllers and metering. The MCC's are commonly utilized in the electrical service entrance for a building. Motor control centers frequently are used for low voltage, 3-phase alternating current motors that vary from 230 V to 600V. Medium voltage motor control centers are designed for big motors that range from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments in order to attain power switching and control.
In areas where extremely corrosive or dusty methods are occurring, the motor control center can be established in a separate air-conditioned room. Typically the MCC will be located on the factory floor near the machinery 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 complete testing or maintenance, extremely large controllers could be bolted into place, whereas smaller controllers may be unplugged from the cabinet. Each motor controller consists of a contractor or a solid state motor controller, overload relays so as to protect the motor, fuses or circuit breakers to provide 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 offer wire ways for power cables and field control.
Inside a motor control center, each and every motor controller can be specified with a lot of various alternatives. Some of the choices 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 circuit breakers and power fuses.
