what is the condition of transformer parallel operation?

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asked Sep 3, 2015 in Electronics by Golam Rabby879 (120 points)

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answered Jan 9 by Shadim (137 points)
Conditions for transformer parallel operation are given below:
The ratio of line voltage of two trasformers must be equal
The secondary windings polarity of two transformers should be same
The per unit impendance of two transformers should be same
The phase sequence of the transformers always be the same
They must have zero relative phase requirements between the secondary voltage

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