There are many methods to test and calculate the capacity of transformer capacity tester. Today, simply introduce the method to test and calculate the capacity of transformer capacity.
Capacity is calculated according to the load rate βM at the highest efficiency of the transformer
When the calculated load of the building is determined, the total installed capacity of the distribution transformer is:
S=Pjs/βb×cosφ2 (KVA) (1)
Where, Pjs -- the calculated active load of the building KW;
Cos φ2 -- average power factor after compensation, not less than 0.9;
β B -- load rate of transformer.
Therefore, transformer capacity determination depends on the selected transformer load rate β B.
We know that when the transformer load rate is:
The efficiency was highest when β B =βM=Po/PKH (2)
Where Po -- no-load loss of transformer;
PKH -- Short circuit loss of transformer.
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