418-03 - Protective Relays
Learning objectives
- Describe the basic operating principles behind protective relays
- Discuss how protective relays support essential requirements of electrical system protection
- List the ANSI standard device-function numbers that identify relays
- Describe the two types of electromechanical relays
- Discuss the benefits of solid-state relays
Course overview
Protective relays shield personnel and equipment from catastrophic damage caused by an uncontrolled short circuit or ground fault. Relays act quickly, disconnecting power from the fault area while leaving the rest of the system unaffected. To ensure safety and reliability, technicians must understand the protection system. The Protective Relays training course identifies protection relay elements on an electrical drawing according to the ANSI (American National Standards Institute) standard device numbers. It also describes basic relay operations. This online course compares the accuracy and options provided by commonly used relays. Protective Relays is part of the Electrical Protection and Grounding training series.
The individuals involved in the development and promotion of this course do not receive any compensation or financial benefits outside of their regular employment for their work on this course.
