High Voltage Power Transformer Selection Points
Load Nature
1) When there are a large number of primary or secondary loads, two or more high voltage power transformers should be installed. When any one of the transformers is disconnected, the capacity of the remaining transformers can meet the power consumption of the primary and secondary loads. The primary and secondary loads should be concentrated as much as possible and should not be too dispersed.
2) When the seasonal load capacity is large, a special transformer should be installed. For example, the load of air-conditioning refrigerators and electric heating loads for heating in large civil buildings.
3) When the concentrated load is large, a special transformer should be installed. Such as large heating equipment, large X-ray machines, electric arc furnaces, etc.
4) When the lighting load is large or the use of a shared high voltage power transformer for power and lighting seriously affects the lighting quality and the life of the bulb, a dedicated lighting transformer can be installed. In general, power and lighting share a transformer.
Use Environment
Under normal medium conditions, oil immersed transformers or dry type transformers can be used, such as independent or attached substations in industrial and mining enterprises, agriculture, independent substations in residential areas, etc. Available transformers are S8, S9, S10, SC(B)9, SC(B)10, etc.
temperature environment
① Maintain long-term stability at 220°C
②Under the temperature of 350℃, it can withstand short-term operation
③In a wide range of temperature and humidity, maintain stable performance
④Under the temperature of 250℃, it will not melt, flow and support combustion
⑤Under the temperature of 750℃, no toxic or corrosive gas will be released
Electricity load
1) The capacity of high voltage power transformer s should be calculated based on the facility capacity of various electrical equipment (generally ignoring fire protection load). The compensated apparent capacity is the basis for selecting the capacity and number of high voltage power transformers. Generally, the load rate of the transformer is about 85%. This method is relatively simple and can be used for estimating capacity.
2) In GB/T17468-1998 "Guidelines for Selection of Power Transformers", the recommended capacity selection of distribution transformers should be based on GB/T15164-94 "Guidelines for Oil-immersed Power Transformer Loads" or GB/T17211-1998 "Dry Type Power Transformer Load Guidelines" and calculate the load to determine its capacity.
