Answer / haiderali

When any one phase of 11 KV supply fails, phase voltage
will be half of the normal voltage in two phases of
secondary side while only one phase will deliver full
voltage (i.e. 440/sq.root3)with respect to neutral.

Answer / vikas

when one ohase of transformer will fail...then transformer
will behave as open delta connection and give the output
reduced to 53%of the actual output....

Answer / pravesh

if the 11kv /440 v supply if one phase fails then at that
time open delta circuit takes place in that case the for
which the equipment connected to the secondary side , 440v
side will work below their efficiency

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