Drive Motor Forklift - MCC's or otherwise known as Motor Control Centersare an assembly of one section or more that include a common power bus. These have been used in the automobile business since the 1950's, for the reason that they were utilized lots of electric motors. Now, they are utilized in various commercial and industrial applications.
Motor control centers are a modern method in factory assembly for several motor starters. This machinery can comprise metering, variable frequency drives and programmable controllers. The MCC's are normally utilized in the electrical service entrance for a building. Motor control centers commonly are utilized for low voltage, 3-phase alternating current motors which vary from 230 volts to 600 volts. Medium voltage motor control centers are intended for large motors which range from 2300V to 15000 V. These units make use of vacuum contractors for switching with separate compartments so as to attain power control and switching.
In factory locations and area which have corrosive or dusty processing, the MCC can be installed in climate controlled separated locations. Normally the MCC will be positioned on the factory floor next to the machinery 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 can be unplugged from the cabinet to be able to complete maintenance or testing, while really big controllers could be bolted in place. Every motor controller consists of a contractor or a solid state motor controller, overload relays to protect the motor, circuit breaker or fuses to be able to supply short-circuit protection as well as a disconnecting switch to be able to isolate the motor circuit. Separate connectors enable 3-phase power to be able to enter the controller. The motor is wired to terminals situated within the controller. Motor control centers provide wire ways for field control and power cables.
Within a motor control center, each motor controller can be specified with several different alternatives. Some of the alternatives include: pilot lamps, separate control transformers, extra control terminal blocks, control switches, and many types of bi-metal and solid-state overload protection relays. They also have different classes of kinds of power fuses and circuit breakers.
Regarding the delivery of motor control centers, there are numerous alternatives for the consumer. These could be delivered as an engineered assembly with a programmable controller together with internal control or with interlocking wiring to a central control terminal panel board. Conversely, they can be provided set for the customer to connect all field wiring.
MCC's generally sit on floors that should have a fire-resistance rating. Fire stops could be needed for cables which penetrate fire-rated walls and floors.
Click to Download the pdf