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Inside factory assembly for motor starter; motor control centers are rather common technique. The MCC's consist of variable frequency drives, programmable controllers and metering. The MCC's are normally found in the electrical service entrance for a building. Motor control centers often are utilized for low voltage, 3-phase alternating current motors which range from 230 volts to 600 volts. Medium voltage motor control centers are designed for big motors that range from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments to be able to accomplish power control and switching.
In areas where extremely dusty or corrosive methods are happening, the motor control center could be installed in a separate air-conditioned room. Normally the MCC will be positioned on the factory floor near 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. In order to complete maintenance or testing, very big controllers could be bolted into place, whereas smaller controllers can be unplugged from the cabinet. Each and every 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 enable 3-phase power so as to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers supply wire ways for power cables and field control.
Every motor controller in a motor control center can be specified with a range of alternatives. These options include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many types of bi-metal and solid-state overload protection relays. They also have different classes of kinds of circuit breakers and power fuses.
