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MCC's or also known as Motor Control Centersare an assembly of one or more sections that contain a common power bus. These have been used in the vehicle business since the 1950's, because they were utilized lots of electric motors. Now, they are used in other industrial and commercial applications.
Motor control centers are a modern practice in factory assembly for some motor starters. This particular machine could comprise variable frequency drives, programmable controllers and metering. The MCC's are commonly seen in the electrical service entrance for a building. Motor control centers commonly are utilized for low voltage, 3-phase alternating current motors that vary from 230 volts to 600 volts. Medium voltage motor control centers are designed for big motors which range from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments so as to achieve power control and switching.
In locations where very dusty or corrosive processes are happening, the motor control center may be installed in a separate air-conditioned room. Usually 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. In order to complete testing or maintenance, very large controllers can be bolted into place, whereas smaller controllers can 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, circuit breaker or fuses to supply short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors enable 3-phase power to enter the controller. The motor is wired to terminals situated within the controller. Motor control centers provide wire ways for power cables and field control.
Each motor controller inside a motor control center can be specified with a range of options. These alternatives consist of: control switches, pilot lamps, separate control transformers, extra control terminal blocks, and various types of bi-metal and solid-state overload protection relays. They likewise have various classes of types of circuit breakers and power fuses.
Concerning the delivery of motor control centers, there are various options for the consumer. These can be delivered as an engineered assembly with a programmable controller along with internal control or with interlocking wiring to a central control terminal panel board. On the other hand, they can be provided prepared for the customer to connect all field wiring.
MCC's commonly sit on floors that must have a fire-resistance rating. Fire stops could be necessary for cables that penetrate fire-rated floors and walls.
