A Good Resource for Electrical Theory Basics

All high voltage electrical testers should understand the basics of electrical theory. Unfortunately, Many people in the high voltage electrical testing industry fall into testing by accident and never get good training material on electrical theory basics.  They know how to use the equipment to test that relay, transformer, motor, etc., but never really get the whole picture of how it all works together.

If you fall into that camp, or are looking to review the basics of electrical theory, this website is an excellent resource.  It’s very straightforward and free!

You can follow this link to electrical basics to learn electrical theory basics about the following topics:

• Chapter 1: BASIC AC THEORY
• Chapter 2: COMPLEX NUMBERS
• Chapter 3: REACTANCE AND IMPEDANCE — INDUCTIVE
• Chapter 4: REACTANCE AND IMPEDANCE — CAPACITIVE
• Chapter 5: REACTANCE AND IMPEDANCE — R, L, AND C
• Chapter 6: RESONANCE
• Chapter 7: MIXED-FREQUENCY AC SIGNALS
• Chapter 8: FILTERS
• Chapter 9: TRANSFORMERS
• Chapter 10: POLYPHASE AC CIRCUITS
• Chapter 11: POWER FACTOR
• Chapter 12: AC METERING CIRCUITS
• Chapter 13: AC MOTORS
• Chapter 14: TRANSMISSION LINES
• Chapter 15: CONTRIBUTOR LIST

http://www.allaboutcircuits.com/vol_2/index.html

Are you looking for some good animations that discuss how electricity is created and how motors turn.  This is also an excellent link.

http://www.animations.physics.unsw.edu.au/jw/electricmotors.html

Do you want a better understanding of phasor diagrams? Follow these links:

http://www.animations.physics.unsw.edu.au/jw/AC.html