Forklift Drive Motor - Motor Control Centers or MCC's, are an assembly of one enclosed section or more, that have a common power bus principally containing motor control units. They have been utilized ever since the 1950's by the vehicle trade, for the reason that they utilized a lot of electric motors. Today, they are utilized in other commercial and industrial applications.
Motor control centers are a modern technique in factory assembly for some motor starters. This particular equipment could consist of metering, variable frequency drives and programmable controllers. The MCC's are normally found in the electrical service entrance for a building. Motor control centers frequently are utilized for low voltage, 3-phase alternating current motors that range from 230 volts to 600 volts. Medium voltage motor control centers are made for big motors which range from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments to be able to accomplish power switching and control.
Within factory locations and area which have corrosive or dusty processing, the MCC could be installed in climate controlled separated locations. Typically the MCC will be located on the factory floor next 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 may be unplugged from the cabinet to complete maintenance or testing, while really big controllers can be bolted in place. Each and every motor controller consists of a contractor or a solid state motor controller, overload relays In order to protect the motor, fuses or circuit breakers so as to supply short-circuit protection and a disconnecting switch to be able to isolate the motor circuit. Separate connectors enable 3-phase power in order to enter the controller. The motor is wired to terminals located in the controller. Motor control centers offer wire ways for power cables and field control.
Every motor controller inside a motor control center can be specified with various alternatives. These options comprise: extra control terminal blocks, control switches, pilot lamps, separate control transformers, as well as numerous types of bi-metal and solid-state overload protection relays. They even comprise different classes of kinds of power fuses and circuit breakers.
There are several choices 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 could be provided ready for the client to connect all field wiring.
MCC's commonly sit on floors that are required to have a fire-resistance rating. Fire stops may be needed for cables that penetrate fire-rated floors and walls.
Click to Download the pdf