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Within factory assembly for motor starter; motor control centers are fairly common technique. The MCC's comprise variable frequency drives, programmable controllers and metering. 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 that range from 230 V to 600V. Medium voltage motor control centers are designed for large motors which vary from 2300 volts to 15000 volts. These units make use of vacuum contractors for switching with separate compartments to be able to accomplish power switching and control.
In locations where really dusty or corrosive processes are occurring, the motor control center may be established 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. To complete maintenance or testing, extremely large controllers could be bolted into place, whereas smaller controllers can be unplugged from the cabinet. 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 to provide short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors allow 3-phase power to be able to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers offer wire ways for field control and power cables.
Each motor controller inside a motor control center can be specified with a range of options. These alternatives include: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and various kinds of solid-state and bi-metal overload protection relays. They also comprise various classes of kinds of power fuses and circuit breakers.
