How to set up an electrical network for a newly built small-scale factory?
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A new small-scale, high-precision factory is being established; it will mainly use 380V and 220V motors, with around 60 of such motors in total. There is also lighting required for the interior of the equipment and the office areas. How should the electrical network be designed? I need some advice; I’m a complete beginner in electrical engineering.
For such matters, it is necessary to go through the power supply department in your area and consult them regarding the installation of facilities such as substations or transformers.
Xiaobai is also asking for it! :):):)
First, determine the power load class and the electrical capacity required by the equipment
Small chemical plants are generally classified as category II loads, with a power consumption of around 10 KVA. Is there a schematic diagram of such a power supply design that I can use as a reference?
Small chemical plants are generally classified as category II loads, with a power consumption of around 10 KVA. Is there a schematic diagram of such a power supply design that I can use as a reference?
Small chemical plants are generally classified as category II loads, with a power consumption of around 10 KVA. Is there a schematic diagram of such a power supply design that I can use as a reference?
There really are no design drawings; even if there were, they probably couldn’t be provided to you… However, based on my experience in fine chemicals, I can offer the original poster some suggestions and design ideas. Feel free to discuss any questions further: 1. The main power supply is 10 kV, with two transformers. Behind each transformer is an incoming cable cabinet (from the transformer output to the distribution cabinet). After that comes a capacitor compensation cabinet, and further behind that is a tie cabinet (a switch cabinet that connects the outputs of the two transformers together). After the tie cabinet, there are outgoing cable cabinets, or in some cases, the busbars go directly into the distribution cabinet (it’s recommended to use large circuit breakers or protective switches). 2. The cable from the distribution cabinet goes to the lighting cabinet, from where it is supplied to various workshops that require lighting. It’s sufficient to estimate the electrical load; for lighting purposes, there’s no need to be too precise. However, the power for our instruments (mains power) is generally drawn from the lighting system, with the UPS also getting its power from the lighting system. 3. The remaining component is the power cabinet; its internal layout should be designed carefully. In cases where the power requirement is not high (2.2 KW or less), direct-drive motors are generally used ； 5.5KW and above mainly use variable-frequency starting (or soft starting). Arrange it, and then calculate the load. If the power factor is not high, an additional capacitor compensation cabinet can also be installed. 4. I don’t know the size of the chemical plant either – what is the incoming voltage, and how many substations are there? How many substations? Which part do you want to design?
I truly appreciate your reply. Fine chemical plants are not large in scale; one substation is sufficient. I mainly don’t know how the busbars are arranged in the two sections between the 10KV input and the final 380V drawer cabinets. Also, is the incoming cable cabinet located in front of or behind the transformer? Do each transformer have its own outgoing cable cabinet? I’ll draw a simple diagram; could you give me some advice?