The synchronous reactance per phase of the 460 V, 60 Hz, Y-connected 6-pole synchronous generator is 1.2 Ω. full load armature current 30 A (at 0.8 reverse power-coefficient). Rotary losses 1.5 kW and core losses 1.0 kW (60 Hz at full load). The armature resistance winding losses are neglected. Excitation current, generator no load terminal voltage is set to 480 V while operating. According to this: a. What is the rotation speed of the generator? b. What will be the terminal voltages of the generator in the following cases? 1. At rated load and current and a reverse power-coefficient of 0.8; 2. At rated load and current and a power-coefficient of 1.0; 3. At rated load and current and a forward power-coefficient of 0.8
The synchronous reactance per phase of the 460 V, 60 Hz, Y-connected 6-pole synchronous generator is 1.2 Ω. full load armature current 30 A (at 0.8 reverse power-coefficient). Rotary losses 1.5 kW and core losses 1.0 kW (60 Hz at full load). The armature resistance winding losses are neglected. Excitation current, generator no load terminal voltage is set to 480 V while operating. According to this:
a. What is the rotation speed of the generator?
b. What will be the terminal voltages of the generator in the following cases? 1. At rated load and current and a reverse power-coefficient of 0.8; 2. At rated load and current and a power-coefficient of 1.0; 3. At rated load and current and a forward power-coefficient of 0.8;
Step by step
Solved in 3 steps with 2 images
