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How to calculate transformer efficiency
2011-05-15 by seoer1
Transformer efficiency is the active Power Transformer output and input of the active power P1 P2 ratio, expressed as a percentage. Ie: η = (P2 / P1) * 100%
Because P2 = P1 - P (P is the total transformer loss), there are: η = [1 - P / (P2 + P)] * 100%
Assumptions: 1. Transformer rated no-load loss is P0, and that its value does not change with the load
2. Rated load loss transformer PK, and that the actual load loss and load factor is proportional to the square of β ^ 2.
3. Calculate P2, it neglected to run when the secondary load voltage change, that P2 = β * Se * cosa
Based on these assumptions, we get:
η = [1 - (P0 + β ^ 2 * PK) / (β * Se * cosa + P0 + β ^ 2 * PK)] * 100% of this type is the transformer efficiency formula

β: load factor Se: transformer rated capacity cosa: load power factor
keywords:Electrical Distribution Transformer
keywords:electric distribution transformer