Forklift Drive Motor - Motor Control Centers or MCC's, are an assembly of one or more enclosed sections, which have a common power bus mainly consisting of motor control units. They have been utilized since the 1950's by the auto business, in view of the fact that they used a lot of electric motors. Today, they are used in a variety of commercial and industrial applications.
Motor control centers are a modern practice in factory assembly for several motor starters. This particular machinery could include programmable controllers, metering and variable frequency drives. The MCC's are normally used in the electrical service entrance for a building. Motor control centers frequently are utilized for low voltage, 3-phase alternating current motors which vary from 230 V to 600V. 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 achieve power switching and control.
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 situated on the factory floor close to the equipment it is controlling.
A MCC has one or more vertical metal cabinet sections with power bus and provisions for plug-in mounting of individual motor controllers. Smaller controllers could be unplugged from the cabinet to be able to complete maintenance or testing, whereas very large controllers can be bolted in place. Every motor controller has a solid state motor controller or a contractor, overload relays to protect the motor, fuses or circuit breakers in order to provide short-circuit protection and a disconnecting switch so as 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 supply wire ways for field control and power cables.
Every motor controller in a motor control center could be specified with different choices. These options include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, as well as many types of bi-metal and solid-state overload protection relays. They even have different classes of types of circuit breakers and power fuses.
There are a lot of choices concerning delivery of MCC's to the client. They can be delivered as an engineered assembly with interlocking wiring to a central control terminal panel board or programmable controller together with internal control. Conversely, they can be supplied prepared for the client to connect all field wiring.
MCC's commonly sit on floors that are required to have a fire-resistance rating. Fire stops can be needed for cables which go through fire-rated walls and floors.
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