Equipment connection in electrical distribution room
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Hello everyone, what devices are available in the MCC and PCC in an electrical distribution room? ? ? How are they connected? ? ? How are things such as frequency converters, transformers, various circuit breakers, soft starters, and switchgear connected? ? ? How to connect it to the motor on site in order to control its speed and start it? ? ?
It is necessary to examine the drawings, as well as electrical components such as secondary wiring, soft starters, and frequency converters. The product manual also needs to be reviewed.
This is the basis of electrical systems. Generally, power comes from a higher-voltage supply of 10 KV or more, passing through transformers in the distribution room to be converted to 380 V. The output of these transformers is connected to the busbars in the switchgear, from where power is distributed to each individual circuit panel within the switchgear. The typical components in each circuit panel include: 1) circuit breaker, contactor, and thermal relay, leading to the motor on site; 2) circuit breaker and frequency converter, leading to the motor on site; 3) circuit breaker and soft starter, leading to the motor on site. The control circuit is on the terminal block of the switchgear, leading to the on-site button.
Reply to 3# wzc0136: Hello my friend. I don’t know much about electricity, so I hope you can give me some guidance. The high-voltage electricity from the power supply station first passes through a device before reaching our transformer. This intermediate device has an incoming line (from the power supply station) and an outgoing line (leading to our transformer), as well as an electric meter. The wires coming out of our transformer go into two MCCs. I would like to ask: if there is a power factor compensation function, where is it connected? Inlet or outlet? ? ? What other equipment is inside MCC’s cabinet? One of my devices has two labels, one saying N and the other saying R – what kind of device is it? ? What device is meant by BA control in some cases? ? ?
The device you’re referring to as the one in the middle is likely the metering box, that is, the current and voltage transformers. As for power factor compensation, it should be carried out as you said: high-voltage compensation at the inlet of the transformer, and low-voltage compensation at the outlet. The motor control center, also known as the motor drive center or electric motor control center, has the English name MOTOR CONTROL CENTER and is abbreviated as MCC. The motor control center manages power distribution and instrumentation equipment in a centralized manner; it incorporates various motor control units, feeder connection units, power distribution transformers, lighting distribution panels, interlock relays, and metering equipment into a single, integrated enclosure, all of which are powered by a common enclosed busbar. PCC (Point of Common Coupling) refers to the common connection point, where multiple user loads are connected in an electrical power system. BA control – I think you might have it reversed; it should be AB control :lol It seems like you’re still a well-funded organization
The answer on floor 5 was very detailed; we learned together*
ABcontrol should be an interlock automatic switching device for two A and B circuits, right?
It would be better to take some photos so everyone can identify them.
The explanation of concepts on the 5th floor is very clear. In my opinion, the key thing now is that the original poster should read the drawings from start to finish. Find out the function of each device.