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MCC's or also known as Motor Control Centersare an assembly of one section or more which have a common power bus. These have been used in the vehicle business since the 1950's, since they were utilized lots of electric motors. Now, they are utilized in various commercial and industrial applications.
Motor control centers are a modern practice in factory assembly for several motor starters. This machine can include variable frequency drives, programmable controllers and metering. The MCC's are normally utilized in the electrical service entrance for a building. Motor control centers often are used for low voltage, 3-phase alternating current motors which vary from 230 volts to 600 volts. Medium voltage motor control centers are made for big motors which vary from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments to be able to attain power switching and control.
In areas where very dusty or corrosive methods are taking place, the motor control center can be established in a separate air-conditioned room. Normally the MCC would be situated on the factory floor adjacent to the machines 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 be able to complete testing or maintenance, very big controllers can be bolted into place, whereas smaller controllers can be unplugged from the cabinet. Every motor controller consists of a contractor or a solid state motor controller, overload relays In order to protect the motor, circuit breaker or fuses so as to supply short-circuit protection as well as a disconnecting switch to be able to isolate the motor circuit. Separate connectors allow 3-phase power in order to enter the controller. The motor is wired to terminals located in the controller. Motor control centers supply wire ways for field control and power cables.
Every motor controller within a motor control center can be specified with a range of alternatives. These choices consist of: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and numerous kinds of solid-state and bi-metal overload protection relays. They likewise have various classes of kinds of power fuses and circuit breakers.
There are several choices concerning delivery of MCC's to the customer. They could be delivered as an engineered assembly with interlocking wiring to a central control terminal panel board or programmable controller together with internal control. On the other hand, they could be supplied ready for the customer to connect all field wiring.
MCC's generally sit on floors that should have a fire-resistance rating. Fire stops can be necessary for cables which penetrate fire-rated walls and floors.
