Forklift Drive Motor - MCC's or Motor Control Centersare an assembly of one or more sections that include a common power bus. These have been utilized in the automobile business since the 1950's, since they were made use of a large number of electric motors. Now, they are used in various industrial and commercial applications.
Inside factory assembly for motor starter; motor control centers are fairly common practice. The MCC's include variable frequency drives, programmable controllers and metering. The MCC's are normally seen in the electrical service entrance for a building. Motor control centers frequently are used for low voltage, 3-phase alternating current motors that vary from 230 volts to 600 volts. Medium voltage motor control centers are made for large motors which range from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments to be able to achieve power control and switching.
In places where very dusty or corrosive methods are occurring, the motor control center can be installed in a separate air-conditioned room. Usually the MCC would be positioned 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 could be unplugged from the cabinet so as to complete testing or maintenance, whereas extremely big controllers could be bolted in place. Every motor controller consists of a contractor or a solid state motor controller, overload relays In order to protect the motor, fuses or circuit breakers to provide short-circuit protection as well as a disconnecting switch so as to isolate the motor circuit. Separate connectors enable 3-phase power so as to enter the controller. The motor is wired to terminals positioned in the controller. Motor control centers provide wire ways for field control and power cables.
Each motor controller within a motor control center can be specified with a range of alternatives. These options include: control switches, pilot lamps, separate control transformers, extra control terminal blocks, as well as many kinds of solid-state and bi-metal overload protection relays. They likewise comprise different classes of kinds of power fuses and circuit breakers.
There are many options concerning delivery of MCC's to the customer. 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. On the other hand, they can be provided set for the customer to connect all field wiring.
MCC's generally sit on floors that must have a fire-resistance rating. Fire stops can be necessary for cables that go through fire-rated floors and walls.
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