Answer Posted / kj

First of all it is possible to have different size of
generators synchronized. If the condutions of voltage
frequency and phase angle is correct. The load sharing must
be set for a percentage load. This means all set will have
the same load (example 60% of max load on all sets).
Issues can be where the load sharing is not set correctly
or where the governor response is too different. This can
cause hunting of the load from one set to the others.
Another inportant consideration is the wave form. If it is
different high current can flow through the neutral. If the
alternators are made by the same company this is not an
issue.

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