Forklift Drive Motor - Motor Control Centers or otherwise called MCC's, are an assembly of one enclosed section or more, which have a common power bus principally comprising motor control units. They have been utilized since the 1950's by the vehicle trade, in view of the fact that they used a lot of electric motors. Today, they are used in various commercial and industrial applications.
Motor control centers are a modern method in factory assembly for several motor starters. This machinery can include variable frequency drives, programmable controllers and metering. The MCC's are commonly used in the electrical service entrance for a building. Motor control centers commonly are used for low voltage, 3-phase alternating current motors which vary from 230 V to 600V. Medium voltage motor control centers are designed for big motors which range from 2300 volts to 15000 volts. These units utilize vacuum contractors for switching with separate compartments to be able to attain power switching and control.
In locations where really dusty or corrosive methods are taking place, the motor control center may be established in a separate air-conditioned room. Typically the MCC will be situated on the factory floor close 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 complete testing or maintenance, extremely large controllers could be bolted into place, while smaller controllers may be unplugged from the cabinet. Each motor controller consists of a contractor or a solid state motor controller, overload relays to protect the motor, fuses or circuit breakers to be able to supply short-circuit protection and a disconnecting switch so as to isolate the motor circuit. Separate connectors enable 3-phase power in order to enter the controller. The motor is wired to terminals positioned inside the controller. Motor control centers supply wire ways for power cables and field control.
Each and every motor controller inside a motor control center could be specified with different alternatives. These choices comprise: separate control transformers, extra control terminal blocks, control switches, pilot lamps, as well as numerous kinds of solid-state and bi-metal overload protection relays. They even have various classes of types of power fuses and circuit breakers.
There are several 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 along with internal control. Conversely, they can be provided ready for the client to connect all field wiring.
MCC's usually sit on floors that should have a fire-resistance rating. Fire stops may be needed for cables which go through fire-rated floors and walls.
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