What are the condition for parallel operation of transformers?

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What are the condition for parallel operation of transformers?..

Answer / wasim

(1)Polarity
(2)Voltage ratio
(3)% Impedance
(4)Phase rotation
(5)vector diagram & phase displacement

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What are the condition for parallel operation of transformers?..

Answer / joseph mbale

on polarity should equal.
same phases (in phase)

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