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the operation of connecting an alternator with other alternator or with common bus-bars is known as synchronizing.Generally alternator used in power system where they are connected in parallel with other alternator.
condition for parallel operation of an alternator
1. The terminal voltage of incoming alternator must be same as the bus-bars voltage.
2. The speed of incoming alternator must be such that its frequency f =pn/120 as the same frequency of the bus-bars.
3. The voltage of incoming alternator and the bus-bars voltage are in same phage.
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What does Incoming and running generators are in same phase while paralleling two generators mean?
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