## 12.1 AC Voltmeters and Ammeters

AC electromechanical meter movements come in two basic arrangements: those based on DC movement designs, and those...

## 11.4 Practical Power Factor Correction

When the need arises to correct for poor power factor in an AC power system, you probably won’t have the luxury of...

## 11.3 Calculating Power Factor

As was mentioned before, the angle of this “power triangle” graphically indicates the ratio between the amount of...

## 11.2 True, Reactive, and Apparent Power

Reactive Power We know that reactive loads such as inductors and capacitors dissipate zero power, yet the fact that...

## 11.1 Power in Resistive and Reactive AC circuits

Consider a circuit for a single-phase AC power system, where a 120 volt, 60 Hz AC voltage source is delivering power to...

## 10.8 Harmonic Phase Sequences

In the last section, we saw how the 3rd harmonic and all of its integer multiples (collectively called triplen...

## 10.7 Harmonics in Polyphase Power Systems

In the chapter on mixed-frequency signals, we explored the concept of harmonics in AC systems: frequencies that are...

## 10.6 Three-phase Transformer Circuits

Since three-phase is used so often for power distribution systems, it makes sense that we would need three-phase...

## 10.5 Three-phase Y and Delta Configurations

Three-phase Wye(Y) Connection Initially, we explored the idea of three-phase power systems by connecting three voltage...

## 10.4 Polyphase Motor Design

AC Motors Perhaps the most important benefit of polyphase AC power over single-phase is the design and operation of AC...

## 10.3 Phase Rotation

Three-Phase Alternator Let’s take the three-phase alternator design laid out earlier and watch what happens as the...

## 10.2 Three-phase Power Systems

What is Split-Phase Power Systems? Split-phase power systems achieve their high conductor efficiency and low safety...

## 10.1 Single-phase Power Systems

Single phase power system schematic diagram shows little about the wiring of a practical power circuit. Depicted...

## 9.8 Practical Considerations – Transformers

Power Capacity As has already been observed, transformers must be well designed in order to achieve acceptable power...

## 9.7 Special Transformers and Applications

Impedance Matching Because transformers can step voltage and current to different levels, and because power is...
Page 1 Page 2 Page 3 Page 4 Page 5 Page 7 Page 3 of 7