Forklift Drive Motor - Motor Control Centers or likewise called MCC's, are an assembly of one enclosed section or more, which have a common power bus mostly comprising motor control units. They have been utilized ever since the 1950's by the auto business, as they made use of lots of electric motors. Now, they are used in other commercial and industrial applications.
Motor control centers are a modern practice in factory assembly for several 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 used for low voltage, 3-phase alternating current motors that range from 230 V to 600V. Medium voltage motor control centers are intended for big motors that vary from 2300V to 15000 V. These units utilize vacuum contractors for switching with separate compartments in order to attain power switching and control.
Within factory locations and area which have dusty or corrosive processing, the MCC could be installed in climate controlled separated locations. Typically the MCC will be situated on the factory floor near the machines 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 to complete testing or maintenance, while really big controllers can be bolted in place. Each and every motor controller has a contractor or a solid state motor controller, overload relays so as to protect the motor, fuses or circuit breakers to be able to supply short-circuit protection as well as a disconnecting switch in order to isolate the motor circuit. Separate connectors allow 3-phase power to enter the controller. The motor is wired to terminals positioned within the controller. Motor control centers offer wire ways for field control and power cables.
Within a motor control center, each motor controller can be specified with a lot of various choices. Some of the choices consist of: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and various kinds of solid-state and bi-metal overload protection relays. They even 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 customer. These can 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. Conversely, they could be supplied prepared for the customer to connect all field wiring.
MCC's usually sit on floors which should have a fire-resistance rating. Fire stops could be needed for cables that penetrate fire-rated floors and walls.
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