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Inside factory assembly for motor starter; motor control centers are rather common technique. The MCC's consist of metering, variable frequency drives and programmable controllers. The MCC's are commonly seen in the electrical service entrance for a building. Motor control centers frequently are utilized for low voltage, 3-phase alternating current motors that vary from 230 V to 600V. Medium voltage motor control centers are made for big motors that vary from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments in order to attain power switching and control.
In places where extremely dusty or corrosive processes are taking place, the motor control center can be installed in a separate air-conditioned room. Typically the MCC will be positioned on the factory floor close to 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. So as to complete maintenance or testing, very big controllers can be bolted into place, while smaller controllers may be unplugged from the cabinet. Each and every motor controller consists of a solid state motor controller or a contractor, overload relays In order to protect the motor, circuit breaker or fuses so as to supply short-circuit protection as well as a disconnecting switch so as to isolate the motor circuit. Separate connectors allow 3-phase power so as to enter the controller. The motor is wired to terminals located in the controller. Motor control centers provide wire ways for power cables and field control.
Within a motor control center, every motor controller could be specified with several different choices. Some of the alternatives comprise: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many types of bi-metal and solid-state overload protection relays. They also comprise various classes of types of power fuses and circuit breakers.
