Drive Motor Forklift - Motor Control Centers or likewise called MCC's, are an assembly of one or more enclosed sections, which have a common power bus mainly containing motor control units. They have been utilized since the 1950's by the vehicle trade, because they used many electric motors. Today, they are utilized in a variety of commercial and industrial applications.
Motor control centers are a modern practice in factory assembly for several motor starters. This particular machine can include metering, variable frequency drives and programmable controllers. The MCC's are usually found in the electrical service entrance for a building. Motor control centers often are utilized for low voltage, 3-phase alternating current motors which range from 230 V to 600V. Medium voltage motor control centers are designed for large motors which range from 2300 volts to 15000 volts. These units make use of vacuum contractors for switching with separate compartments so as to attain power control and switching.
In areas where extremely dusty or corrosive processes are happening, the motor control center may be established in a separate air-conditioned room. Usually the MCC would be located on the factory floor close to the equipment it is controlling.
A MCC has one or more vertical metallic cabinet sections with power bus and provisions for plug-in mounting of individual motor controllers. Smaller controllers can be unplugged from the cabinet to complete testing or maintenance, whereas very big controllers could be bolted in place. Each motor controller has a solid state motor controller or a contractor, overload relays In order to protect the motor, fuses or circuit breakers to provide short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors allow 3-phase power so as to enter the controller. The motor is wired to terminals situated in the controller. Motor control centers provide wire ways for power cables and field control.
Within a motor control center, every motor controller can be specified with lots of various choices. Some of the alternatives include: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and many types 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 could 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 could be supplied prepared for the customer to connect all field wiring.
MCC's generally sit on floors which are required to have a fire-resistance rating. Fire stops could be required for cables which go through fire-rated walls and floors.
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