Answer / sudheer

when one Generator is running and suppose its rating is
1500 kva/1200 kw,and load increased and we wants to put
more load on GENERATOR . So then we have to run second
generator and to be shift some load on second generator,
otherwise the generator will be over loaded and tripped on
over-load fault. when we connect two generators parrallel,
this arrangement is called synchronisation.we connect the
out-put supply of both generators parallel by
synchronisation.In synchronisation we have to match these
parameters--phase sequence, frequency and voltage.when all
three parameters match we ON the breaker and
synchronisation complete and now we can put more load
(about 2000 kw) on generator.

Answer / joshy govind

sychronisation is important when parrallel operation of two
generators or when we connect a generator to grid.
The generator supply must only be connected to a live
grid,
1. Phase angle difference
2. Voltage differnece
3. frequency diffenrence (slip)
between the generator and grid voltage are within
permissible limits and the phase sequence of both generator
and grid rotating field should be identical.

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