System Protection - The Art of Engineering Relays, Breakers, Reclosers & Fuses

In System Protection, you'll learn ...

• How to provide proper protection for electrical systems
• The differences between breakers, reclosers & fuses
• Common relay types and communication methods
• The consequences of improper circuit protection

Overview

Preview a portion of this course before purchasing it.

Credit: 2 CPD

Length: 35 pages

System protection is known as the art of engineering, the building block of every utility. We need proper protection for generation, transmission, distribution systems and renewables: first and second line of defense as well as back-up protection.

Relays represent the brain power that differentiate between normal and fault conditions and trigger the operating muscle, which are the disconnecting devices, such as circuit breakers and reclosers to isolate the faults.

There are key differences between breakers, reclosers & fuses. The consequences for improper protection and/or relay mis-operation are grave.

This course will show the differences between breakers, reclosers & fuses, as well as the consequences of improper protection and/or relay mis-operation. This course will also cover special relay traits, protection zones, common relay types and communication methods, fuse curves and DER impact.

Learning Objectives

Upon completion of this course, participants will be able to:

• Analyze common causes of faults.
• Explain relays operate and what they are used for.
• Differentiate characteristics of underground (UG) vs. overhead (OH) systems.
• Evaluate the importance of providing overcurrent protection to prevent injury to people.
• Select seven characteristics to consider when selecting a relay.
• Trace zones of protection operate.
• Interpret important concepts of the fuse curve.
• Illustrate instrument transformers are used to communicate with relays.
• Describe IEEE relay numbers.
• Apply two commonly used methods for lightning protection.

Certificate of Completion

You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 14 questions. CPD credits are not awarded until the course is completed and quiz is passed.