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Motor control centers are a modern technique in factory assembly for some motor starters. This particular equipment could comprise metering, variable frequency drives and programmable controllers. The MCC's are usually found in the electrical service entrance for a building. Motor control centers frequently are utilized for low voltage, 3-phase alternating current motors which vary from 230 V to 600V. Medium voltage motor control centers are intended for large motors which range from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments so as to accomplish power control and switching.
In locations where extremely corrosive or dusty methods are taking place, the motor control center may be installed in a separate air-conditioned room. Normally the MCC will be positioned on the factory floor adjacent 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 testing or maintenance, really big controllers could be bolted into place, while smaller controllers can be unplugged from the cabinet. Each motor controller has a solid state motor controller or a contractor, overload relays In order to protect the motor, fuses or circuit breakers to supply short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors enable 3-phase power to be able to enter the controller. The motor is wired to terminals situated in the controller. Motor control centers offer wire ways for power cables and field control.
Each motor controller inside a motor control center could be specified with different options. These alternatives include: pilot lamps, separate control transformers, extra control terminal blocks, control switches, as well as many kinds of bi-metal and solid-state overload protection relays. They also comprise various classes of kinds of power fuses and circuit breakers.
