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Waveform diagrams contain every detail of an electrical system, but that information can be difficult to understand without a lot of effort. Phasor drawings take the complex information embedded in waveform drawings and convert it into phasor diagrams so that you can see the most important information about an electrical system at a glance. Understanding phasor drawings is probably one of the most important skills that a relay tester must have to be successful!
Take this course to learn these topics:
Understanding Phasors and Creating Phasor Drawings
Create and Understand Phasor Diagrams Used by Different Relay and Test-Set Manufacturers
Take this course to learn the basics of three-phase power systems that all relay testers should know
Introduction to Electrical Fundamentals and Frequency
Three-Phase Power Systems