Answer / ibrahim

if field supply got tripped generator behaves as an
induction generator

Answer / deepak mishra

if field winding is disconnected then generator is not
build up bcz there is no any flux in the air gap so no flux
will be cut by armature conductor and at the same time no
emf will be induced
i think raghavendram wrong bcz obove condition occur when
prime mover is disconnected and excitation remains on..

Answer / pankaj agarwal

there are two scenarios one in which it is running in
islanding and other in which it is interconnected with
other system. in case one as field is cut there will be no
supply of exciting current and terminal voltage will fall
to zero. also turbine will tend to overrun as there is
sudden removal of load.
in case two as it is interconnected the stator is still
excited and it will behave like induction generator.

Answer / raghavendran

If Dc Excitation to the field winding got tripped, then a
condition occurs where the syn. gen draws power from the
grid and starts behavingas a motor.Though this condition is
not allowed to persist, and the system is isolated from the
grid.

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