Transformer station, from which the switchgears of production rooms are supplied, consists of a transformer or transformers and the main LV switchboard. In previous articles, we have already discussed how to select the number and size of outlets from this switchgear for power and lighting loads.. You can now, choose the type and size of runoff fields. In industrial plants, skeleton assemblies are most often used as main switchgears. By using the methods of, we find the design power and current (needed) plant, which will allow us to select the feed field (power fields) in the switchgear and transformer (transformers). The feeder bay is equipped with a short circuit breaker and manual switches.
In the case of stations with one transformer, the principle should be followed when selecting it, that the transformer power is:
— 100% calculation capacity - single-shift plant,
— 100 – 125% computing power - a two-shift plant,
— 100 – 145% computing power - a three-shift plant.
Schneider natural-cooled three-phase oil transformers.
In order to facilitate the selection of transformers, the table lists the basic technical data of oil transformers, which can be used in industrial plants.
General rules for the location of transformer stations are as follows:
— zaleca się umieszczać stacje w środku ciężkości obszaru zasilania bądź wewnątrz hali produkcyjnej, be if possible, along the outer walls of the building, and in multi-storey buildings - on individual storeys,
— w przypadku wbudowania lub przybudowania stacji do budynku produkcyjnego, the entrance to the switchboard should be inside the hall,
— komorę transformatorową należy umieszczać od północnej strony budynku,
— nie zezwala się na prowadzenie przez komorę transformatora obwodów nie związanych z ustawionym w tej komorze transformatorem.