Forklift Drive Motor - Motor Control Centers or also called MCC's, are an assembly of one or more enclosed sections, which have a common power bus mostly containing motor control units. They have been utilized since the 1950's by the vehicle industry, since they used a large number of electric motors. Now, they are used in different industrial and commercial applications.
Motor control centers are a modern method in factory assembly for some motor starters. This particular equipment could consist of programmable controllers, metering and variable frequency drives. The MCC's are commonly used in the electrical service entrance for a building. Motor control centers commonly are utilized for low voltage, 3-phase alternating current motors which vary from 230 volts to 600 volts. Medium voltage motor control centers are designed for big motors which range from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments so as to accomplish power control and switching.
In factory area and locations which have dusty or corrosive processing, the MCC could be installed in climate controlled separated locations. Typically the MCC will be located on the factory floor adjacent 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 complete maintenance or testing, really big controllers could be bolted into place, whereas smaller controllers may be unplugged from the cabinet. Each and every motor controller consists of a solid state motor controller or a contractor, overload relays to be able to protect the motor, fuses or circuit breakers in order to supply short-circuit protection and a disconnecting switch in order to isolate the motor circuit. Separate connectors allow 3-phase power to be able to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers offer wire ways for power cables and field control.
Each and every motor controller within a motor control center could be specified with different alternatives. These 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 different classes of types of power fuses and circuit breakers.
There are various alternatives regarding 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 along with internal control. On the other hand, they can be supplied prepared for the client to connect all field wiring.
MCC's usually sit on floors that must have a fire-resistance rating. Fire stops may be needed for cables that penetrate fire-rated walls and floors.
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