**KNOWARE**

**Software for
Education and Industry**

This computer program explains 3 Phase electricity in **13
interactive screens of text, graphics, and animation**.
Three phase electricity is used in virtually every electrical
power distribution system.

The program is recommended for electricians, technicians, engineers, and anyone else who want to understand 3 phase electricity.

Some knowledge of electrical voltage and current is assumed, and a familiarity of 1 phase electricity is helpful but not required.

This program was written by a Professional Engineer who has taught electrical engineering technology for 18 years. The program is written in .html format so you can use your favorite internet browser with hyperlinks, bookmarks, and word searches, and requires no software installation on your computer. Just double-click on the Table of Contents.html and your internet browser launches the program.

- The difference between 3 phase electricity and single phase
- What is a line and what is a phase
- Delta and wye connections
- How to determine line
currents and phase
currents in a delta and a wye

- How to determine line
voltages and phase
voltages in a delta and a wye

- How to calculate 3 phase power
- Where the square root of 3 comes from
- What are vectors and phasors and why are they important
- How 3 phase electricity is made
- What are balanced and unbalanced loads
- What does the neutral wire do
- Advantages of 3 phase electricity over single phase
- What phase sequence is and why it is important
- Common 3 phase connections including delta-delta, delta-wye, and open-delta.

** **
**Chapter**

**
** 1.** Introduction**** **

2.** 3 Phase (vs) Single Phase
Electricity**

3. **How 3 Phase Electricity is Made**

4.** Wye and Delta Loads**

5. **Phase and Line Currents and Voltages**

6. **Three Phase Power**

7.
**Vectors and Phasors**

8. **Scribing out a Sinewave**

9. **Where the Square Root of 3 Comes From**

11.

12.

**Example screen explaining phase and line voltages and
currents
**

**Example screen showing phasors
scribing out 3 phase electricity**

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