Issue of selecting transformers for camp electricity supply
Thread Content
I would like to ask the experienced teachers here: we are currently establishing a temporary construction camp, and we plan to connect a transformer from the nearest 10KV power line in order to supply electricity to the camp. The electrical equipment in the camp includes: wall-mounted air conditioners (100 units), each rated at 1500W, and 220V electric heaters (100 units), each rated at 1500W. 220V (used separately for air conditioners and electric heaters; one is used in winter and the other in summer). Floor-standing air conditioners (5 units), each calculated at 4000W. 220V welding rod dryers (5 units), each calculated at 2000W; 220V electric water heaters (5 units), each calculated at 2000W; 220V kettles (100 units), one per room, each calculated at 1500W. 220V steam ovens for the cafeteria (1 unit), calculated at 20KW. 380V – other electrical devices with relatively low individual power consumption, mainly including computers, lighting, and a small number of washing machines. During the day, construction is mainly carried out in other areas, so the electricity demand is not high; the main power consumption occurs in the cafeteria and office areas. Mainly, the electricity consumption is higher at night. In a situation like this, which transformer with a larger capacity would be appropriate?
The total power of all the devices can be multiplied by a certain simultaneous coefficient, and then divided by a value around 0.7 to 0.8 to determine the transformer capacity
Give it a thumbs up; reactive power also needs to be taken into account. If it’s not a professional scenario, just add everything together and multiply by 1.5
If you are a designer, you need to consult the manual to find out the simultaneous coefficient and required coefficient for each device, then perform an accumulation; the resulting value can be used to determine the appropriate transformer rating. If precision isn’t that important, there’s no need to consider simultaneous coefficients or the required system; simply add them up, and choose a transformer rating that is slightly higher than the resulting value.