Forklift Drive Motor - Motor Control Centers or also called MCC's, are an assembly of one or more enclosed sections, that have a common power bus principally consisting of motor control units. They have been used since the 1950's by the automobile industry, because they made use of a lot of electric motors. Nowadays, they are utilized in various commercial and industrial applications.
Motor control centers are a modern practice in factory assembly for some motor starters. This particular equipment could comprise programmable controllers, metering and variable frequency drives. The MCC's are commonly 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 made for large motors that range from 2300 volts to 15000 volts. These units utilize vacuum contractors for switching with separate compartments so as to achieve power control and switching.
In places where extremely corrosive or dusty methods are happening, the motor control center can be installed in a separate air-conditioned room. Usually the MCC will be positioned on the factory floor next to the equipment 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, very big controllers can be bolted into place, while smaller controllers could 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 provide short-circuit protection as well as 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 positioned in the controller. Motor control centers supply wire ways for power cables and field control.
In a motor control center, each and every motor controller could be specified with a lot of various alternatives. Some of the choices comprise: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and various types of bi-metal and solid-state overload protection relays. They likewise comprise various classes of kinds of circuit breakers and power fuses.
There are a lot of options concerning delivery of MCC's to the client. They could 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 customer to connect all field wiring.
MCC's generally sit on floors which should have a fire-resistance rating. Fire stops can be required for cables that go through fire-rated walls and floors.
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