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Motor control centers are a modern technique in factory assembly for several motor starters. This equipment can include metering, variable frequency drives and programmable controllers. The MCC's are normally utilized 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 designed for big motors that range from 2300 volts to 15000 volts. These units utilize vacuum contractors for switching with separate compartments in order to achieve power switching and control.
In locations where very dusty or corrosive processes are taking place, the motor control center may be installed in a separate air-conditioned room. Usually the MCC will be situated on the factory floor next 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. To be able to complete testing or maintenance, extremely large controllers could 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, fuses or circuit breakers in order 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 positioned in the controller. Motor control centers supply wire ways for field control and power cables.
Inside a motor control center, every motor controller could be specified with several different options. Some of the choices comprise: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and various kinds of bi-metal and solid-state overload protection relays. They likewise comprise various classes of types of power fuses and circuit breakers.
