Drive Motor Forklift - MCC's or likewise known as Motor Control Centersare an assembly of one or more sections that contain a common power bus. These have been used in the automobile business since the 1950's, in view of the fact that they were used a lot of electric motors. These days, they are used in various industrial and commercial applications.
Motor control centers are a modern practice in factory assembly for several motor starters. This machinery could include programmable controllers, metering and variable frequency drives. The MCC's are commonly used in the electrical service entrance for a building. Motor control centers frequently are used for low voltage, 3-phase alternating current motors that range from 230 volts to 600 volts. Medium voltage motor control centers are designed for large motors that vary from 2300V to 15000 V. These units use vacuum contractors for switching with separate compartments in order to attain power control and switching.
Within factory area and locations that have corrosive or dusty processing, the MCC can be installed in climate controlled separated locations. Typically the MCC will be situated on the factory floor near 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 be able to complete maintenance or testing, extremely large controllers can be bolted into place, whereas smaller controllers may be unplugged from the cabinet. Each motor controller consists of a solid state motor controller or a contractor, overload relays to be able to protect the motor, circuit breaker or fuses to be able to provide short-circuit protection as well as a disconnecting switch so as to isolate the motor circuit. Separate connectors enable 3-phase power to be able 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.
Within a motor control center, each motor controller could be specified with several different choices. Some of the choices consist of: extra control terminal blocks, control switches, pilot lamps, separate control transformers, and various types of bi-metal and solid-state overload protection relays. They also comprise various classes of types of power fuses and circuit breakers.
There are numerous alternatives regarding 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 together with internal control. On the other hand, they could be supplied set for the client to connect all field wiring.
Motor control centers typically sit on the floor and should have a fire-resistance rating. Fire stops could be needed for cables that go through fire-rated floors and walls.
Click to Download the pdf