Forklift Drive Motor - Motor Control Centers or likewise called MCC's, are an assembly of one enclosed section or more, that have a common power bus mainly containing motor control units. They have been utilized ever since the 1950's by the auto industry, because they used a large number of electric motors. Today, they are utilized in other industrial and commercial applications.
Motor control centers are a modern method in factory assembly for some motor starters. This particular machinery could 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 often are utilized for low voltage, 3-phase alternating current motors that vary from 230 V to 600V. Medium voltage motor control centers are intended for big motors which range from 2300 volts to 15000 volts. These units use vacuum contractors for switching with separate compartments to be able to achieve power switching and control.
Within factory area and locations that have dusty or corrosive processing, the MCC could be installed in climate controlled separated locations. Normally the MCC will be positioned 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. To be able to complete testing or maintenance, very big controllers can be bolted into place, while smaller controllers can be unplugged from the cabinet. Every motor controller has a contractor or a solid state motor controller, overload relays to protect the motor, circuit breaker or fuses to supply short-circuit protection and a disconnecting switch in order to isolate the motor circuit. Separate connectors allow 3-phase power in order to enter the controller. The motor is wired to terminals situated in the controller. Motor control centers offer wire ways for power cables and field control.
Within a motor control center, each and every motor controller could be specified with a lot of different alternatives. Some of the choices consist of: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and many types of solid-state and bi-metal overload protection relays. They also have various classes of types of power fuses and circuit breakers.
There are several choices regarding 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 along with internal control. On the other hand, they can be provided prepared for the client to connect all field wiring.
Motor control centers usually sit on the floor and should have a fire-resistance rating. Fire stops could be needed for cables which go through fire-rated walls and floors.
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