Forklift Drive Motor - Motor Control Centers or likewise called MCC's, are an assembly of one or more enclosed sections, which have a common power bus mostly consisting of motor control units. They have been utilized since the 1950's by the automobile trade, because they used lots of electric motors. These days, they are utilized in various commercial and industrial applications.
Motor control centers are a modern technique in factory assembly for some motor starters. This machine can consist of metering, variable frequency drives and programmable controllers. The MCC's are commonly used in the electrical service entrance for a building. Motor control centers often are used for low voltage, 3-phase alternating current motors which range from 230 V to 600V. Medium voltage motor control centers are intended for large motors which vary from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments to be able to accomplish power switching and control.
Inside factory locations and area which have corrosive or dusty processing, the MCC can be installed in climate controlled separated locations. Typically the MCC will be situated on the factory floor adjacent 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 can be unplugged from the cabinet so as to complete testing or maintenance, while very large controllers could be bolted in place. Each motor controller consists of a contractor or a solid state motor controller, overload relays to be able to protect the motor, fuses or circuit breakers in order to supply short-circuit protection as well as a disconnecting switch in order to isolate the motor circuit. Separate connectors enable 3-phase power to enter the controller. The motor is wired to terminals situated inside the controller. Motor control centers offer wire ways for field control and power cables.
Within a motor control center, each and every motor controller can be specified with many various choices. Some of the options comprise: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many types of solid-state and bi-metal overload protection relays. They likewise comprise various classes of types of circuit breakers and power fuses.
Concerning the delivery of motor control centers, there are lots of options for the consumer. These could 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 supplied ready for the customer to connect all field wiring.
Motor control centers usually sit on the floor and should have a fire-resistance rating. Fire stops could be required for cables which go through fire-rated floors and walls.
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