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Within factory assembly for motor starter; motor control centers are quite common technique. The MCC's comprise programmable controllers, metering and variable frequency drives. The MCC's are commonly seen 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 made for large motors which range from 2300 volts to 15000 volts. These units utilize vacuum contractors for switching with separate compartments to be able to accomplish power switching and control.
In areas where very dusty or corrosive processes are happening, the motor control center can be installed in a separate air-conditioned room. Normally the MCC would be positioned on the factory floor close to the machines 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. So as to complete testing or maintenance, very big controllers could be bolted into place, while smaller controllers could be unplugged from the cabinet. Every motor controller has a solid state motor controller or a contractor, overload relays In order to protect the motor, circuit breaker or fuses so as to provide short-circuit protection and a disconnecting switch in order to isolate the motor circuit. Separate connectors enable 3-phase power so as to enter the controller. The motor is wired to terminals situated inside the controller. Motor control centers supply wire ways for field control and power cables.
Within a motor control center, each motor controller can be specified with numerous various options. Some of the choices comprise: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and numerous kinds of solid-state and bi-metal overload protection relays. They even have various classes of types of circuit breakers and power fuses.
