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MCC's or otherwise known as Motor Control Centersare an assembly of one or more sections which have a common power bus. These have been utilized in the vehicle industry ever since the 1950's, because they were made use of lots of electric motors. Nowadays, they are used in different commercial and industrial applications.
In factory assembly for motor starter; motor control centers are somewhat common practice. The MCC's consist of metering, variable frequency drives and programmable controllers. The MCC's are normally utilized in the electrical service entrance for a building. Motor control centers commonly are utilized for low voltage, 3-phase alternating current motors which range from 230 V to 600V. 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 to be able to achieve power control and switching.
In factory area and locations that have corrosive or dusty processing, the MCC can be installed in climate controlled separated locations. Usually the MCC will be located on the factory floor adjacent 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 be able to complete maintenance or testing, really large controllers can be bolted into place, whereas smaller controllers could be unplugged from the cabinet. Every motor controller has a solid state motor controller or a contractor, overload relays In order to protect the motor, fuses or circuit breakers to supply short-circuit protection as well as 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 positioned inside the controller. Motor control centers supply wire ways for power cables and field control.
Each motor controller inside a motor control center can be specified with various options. These options include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, as well as various kinds of bi-metal and solid-state overload protection relays. They likewise have different classes of kinds of power fuses and circuit breakers.
Concerning the delivery of motor control centers, there are numerous alternatives for the customer. 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 set for the customer to connect all field wiring.
MCC's usually sit on floors that should have a fire-resistance rating. Fire stops may be necessary for cables that go through fire-rated floors and walls.