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Ammeter and changeover switch Power factor meter Synchroscope Reverse sequence relay
Polyphase Wound-rotor Induction Synchronous
lagging leading maximum minimum
full excitation load power factor number of poles
sine cosine tangent cotangent
Circulating currents are kept to a minimum Field excitation losses are kept to a minimum Generator rotors will have a lesser tendency to hunt Because a power factor increase will decrease kilowatt output
power efficiency effective power power factor
Power factor Power ratio compression ratio Compression factor
good insulation bad insulation high insulation power factor a high slot discharge factor
Open Loop Power Adjustment Initial Probe Power Correction Factor PowerIncrementStep Initial Power Control Thresholdfor Reverse Outer Loop
save network cost improve the reliability of supplying power to important load prevent sequence reverse increase the power factor of important load
inductive resistance combined capacitate
improve power factor reduce voltage oscillation increase the insulation of circuits eliminate regenerated magnetic fields
Each has three separate but identical armature windings acted on by one system ofrotating magnets Each has one armature winding acted on by three identical but separate systems ofrotating magnets All three-phase alternators are designed to operate with a O8 leading power factor The three phases always provide power to the load through three sets of slip ringsand brushes
minimum maximum leading lagging
dynamometer power factor meter three-phase motor polyphase voltmeter
Large misalignments can be tolerated between the shaft and engine coupling Slip is held to a minimum when reversing shaft rotation Engine torsion vibrations to the driven shaft are eliminated It aids in maintaining power factor
connected load prime mover speed field excitation generators rated voltage
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