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Motor control centers are a modern practice in factory assembly for some motor starters. This particular machinery can include metering, variable frequency drives and programmable controllers. The MCC's are usually used in the electrical service entrance for a building. Motor control centers commonly are utilized 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 that range from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments to be able to attain power control and switching.
Inside factory area and locations that have dusty or corrosive processing, the MCC could be installed in climate controlled separated locations. Typically the MCC will be situated 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 testing or maintenance, extremely large controllers could be bolted into place, whereas smaller controllers could be unplugged from the cabinet. Each and every motor controller has a contractor or a solid state motor controller, overload relays so as to protect the motor, fuses or circuit breakers to supply short-circuit protection as well as a disconnecting switch in order to isolate the motor circuit. Separate connectors enable 3-phase power to enter the controller. The motor is wired to terminals positioned inside the controller. Motor control centers provide wire ways for field control and power cables.
In a motor control center, each and every motor controller can be specified with numerous different alternatives. Some of the alternatives consist of: 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.
