Oil-immersed transformer engineering design and product choice points

A selection based on the nature of the load transformer

1) There are a lot of one or two loads, should be installed two sets and above transformer, when either a transformer is disconnected, the remaining capacity of the transformer and the two can meet a load electricity. One, two concentrated loads as possible, should not be too dispersed.
  2) Seasonal load capacity is large, dedicated transformer should be installed. Such as large civil aircraft in air conditioning and refrigeration load, heating with electric load and so on.
  3) concentrated load is large, dedicated transformer should be installed. Such as large heating  mcb circuit breaker , large X-ray machine, electric arc furnace and so on.
  4) When the lighting load large or shared power and lighting with transformer seriously affect the quality of lighting and lamp life, you can set up special lighting transformer. Generally, the power and lighting shared transformer.
  2 Select the transformer according to the environment
A) Under normal conditions, the media, the choice of oil-immersed transformer or dry-type transformers Electric energy meter as mining, agriculture, independent or attached to building substation, substation and other independent community. Choice of transformer S8, S9, S10, SC (B) 9, SC (B) 10 and so on.
2 Select the transformer according to the electricity load

1) distribution transformer capacity, a variety of electrical devices should be integrated facility capacity, find computational load (generally excluding fire load), after compensation is selected depending on the capacity of the transformer capacity and the number of units basis. General transformer load rate of 85 percent. This method is relatively simple and can be used for estimating capacity purposes.
  2) GB/T17468-1998 "guide for the selection of power transformers", the recommended distribution  circuit breakers  capacity selection should be based on GB/T15164-94 "oil-immersed power transformer loading guidelines" or GB/T17211-1998 "dry power transformer load guidelines "and the computational load to determine its capacity. The two guidelines provide a computer program and the normal cycle of the load chart to determine the distribution transformer capacity.