1. Disadvantage of high current THD (Total Harmonic Distortion) in a Drive - Derating of the machine and Torque pulsations at the shaft.
2. A phasor is a rotating vector. The benefit of using phasors in electrical engineering analysis is that it greatly simplifies the calculations required to solve circuit problems.
3. The angle between the applied voltage and the current depends on certain characteristics of the circuit. These characteristics can be classified as being resistive, capacitive, and inductive.
4. The angle between the voltage and the current in the circuit is called the power angle.
5. Apparent power and reactive power does not represent any measure of real energy.
6. Power Triangle - The relationship
between apparent power (S), reactive power (Q) and real power (P) can be shown like this. By convention, Q is shown positive for inductive circuit and negative for capacitive circuit.
Q - generated power losses in the circuit and voltage drops in the lines and cables.
7. The “neutral” wire of a three-phase system will conduct electricity if the source and/or the load are unbalanced.
8. In three-phase systems two sets of voltages and currents can be identified. These are the phase and line voltages and currents.
9. Three-phase circuits can have their sources and/or loads connected in wye (star) or in delta.
10. Almost without exception, turbine-driven generators have their windings connected in wye (star).
11.
2. A phasor is a rotating vector. The benefit of using phasors in electrical engineering analysis is that it greatly simplifies the calculations required to solve circuit problems.
3. The angle between the applied voltage and the current depends on certain characteristics of the circuit. These characteristics can be classified as being resistive, capacitive, and inductive.
4. The angle between the voltage and the current in the circuit is called the power angle.
5. Apparent power and reactive power does not represent any measure of real energy.
6. Power Triangle - The relationship
between apparent power (S), reactive power (Q) and real power (P) can be shown like this. By convention, Q is shown positive for inductive circuit and negative for capacitive circuit.Q - generated power losses in the circuit and voltage drops in the lines and cables.
7. The “neutral” wire of a three-phase system will conduct electricity if the source and/or the load are unbalanced.
8. In three-phase systems two sets of voltages and currents can be identified. These are the phase and line voltages and currents.
9. Three-phase circuits can have their sources and/or loads connected in wye (star) or in delta.
10. Almost without exception, turbine-driven generators have their windings connected in wye (star).
11.
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