UL 845, 6th Edition, June 28, 2021 – UL Standard for Safety Motor Control Centers. Products covered. This standard applies to motor control centers to be used in accordance with the U.S. National Electrical Code, ANSI/NFPA 70, CSA C22.

UL 845
Low Voltage Motor Control Centers (UL 845)

A motor control center (MCC) is a type of electrical switchboard, which contains one or more motor starter sections. The advantage of utilizing a CUBIC switchboard solution for motor starter sections is that the solution can be combined with other distribution switchboards.

The MCC panels are conventional to the international standards and are available with multiple power stabs that help in supporting high capacity industrial motors….Technical Specification.

PCC: The main supply of the MCC /Syaten is taken from PCC. MCC are used for motor control station most of the time. PCC acts as a gateway for electrical line.

A low voltage motor control center (LV-MCC) is an assembly of one or more enclosed sections having a common power bus and principally containing motor control units. LV-MCCs provide the most suitable method for grouping electrical motor control, automation, and power distribution in a compact and economical package.

MCC means MOTOR CONTROL CENTRE (As You know). It is used to control motor feeder. PCCmeansPOWER CONTROL CENTRE(As You Know). It is used toPower feeder. Generally, MCC feeds from the PCC panels.

Motor Control Centers (MCCs) are segmented into two distinct classifications: Low Voltage and Medium Voltage.

• Low Voltage MCCs are used for low voltage three-phase alternating current motors from 230 V to less than 1000 V.
• Medium-voltage MCCs are used for large motors requiring 1000 V to around 15000 V.

We already know that in a DC Series motor the field winding has very less resistance than a DC Shunt Motor as the field is connected in series with the Armature Winding. So if we give AC supply on a DC Series Motor it will run perfectly. In fact, DC Series can run on both AC and DC supply.