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Within factory assembly for motor starter; motor control centers are rather common technique. The MCC's comprise programmable controllers, metering and variable frequency drives. The MCC's are commonly utilized in the electrical service entrance for a building. Motor control centers commonly are used for low voltage, 3-phase alternating current motors that range from 230 volts to 600 volts. 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 attain power control and switching.
In places where very dusty or corrosive processes are happening, the motor control center may be established in a separate air-conditioned room. Normally the MCC will be situated on the factory floor next 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 big controllers can be bolted into place, whereas smaller controllers can be unplugged from the cabinet. Each motor controller has a solid state motor controller or a contractor, overload relays to protect the motor, circuit breaker or fuses to provide short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors allow 3-phase power to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers provide wire ways for power cables and field control.
Every motor controller inside a motor control center can be specified with a range of alternatives. These choices include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many kinds of bi-metal and solid-state overload protection relays. They likewise comprise different classes of types of power fuses and circuit breakers.
