2.1 A 480 V, 50 Hz, Y-connected, 4 pole synchronous generator has the OCC shown in the figure 1 below. This generator ha
Posted: Tue Apr 26, 2022 1:59 pm
2.1 A 480 V, 50 Hz, Y-connected, 4 pole synchronous generator
has the OCC shown in the figure 1 below. This generator has a
synchronous reactance of 0.1 Ω and armature resistance of 0.015 Ω.
At full-load, the machine supplies 600 A at 0.8 PF lagging. Under
full-load conditions, the friction and windage losses are 40 kW,
and the core losses are 30 kW. Ignore any field circuit losses.
2.1.1 What is the speed of rotation of this generator?
2.1.2 How much field current must be supplied to the
generator to make the terminal voltage 480 V at no-load?
2.1.3 Under full-load conditions, how much field current will be
required to keep the terminal voltage equal to 480 V?
2.1.4 Under full-load conditions, how much power is the
generator supplying? How much power is supplied by the prime mover?
What is the machine’s overall efficiency?
has the OCC shown in the figure 1 below. This generator has a
synchronous reactance of 0.1 Ω and armature resistance of 0.015 Ω.
At full-load, the machine supplies 600 A at 0.8 PF lagging. Under
full-load conditions, the friction and windage losses are 40 kW,
and the core losses are 30 kW. Ignore any field circuit losses.
2.1.1 What is the speed of rotation of this generator?
2.1.2 How much field current must be supplied to the
generator to make the terminal voltage 480 V at no-load?
2.1.3 Under full-load conditions, how much field current will be
required to keep the terminal voltage equal to 480 V?
2.1.4 Under full-load conditions, how much power is the
generator supplying? How much power is supplied by the prime mover?
What is the machine’s overall efficiency?