railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrical Machines Alternator and Synchronous Motors Alternator Parallel Operation
To connect two alternators in parallel the alternators should be synchronized which ensures that at the moment of closing the voltage across the three-phase of the circuit breaker should be close to zero. What condition is required to ensure the same?
1
The generated voltage must be equal to the grid voltage (approximately)
2
The frequency of generated voltage must be greater than the grid voltage
3
The generated voltage must be larger than the grid voltage (approximately)
4
The generated voltage must be smaller than the grid voltage (approximately)