Relays 1 - Watch Instant Video

Training Sessions

Introduction to Relays
Overcurrent Relays
Directional Overcurrent Relays
Reclosing Relays
Voltage Relays
Auxiliary Relays
Solid-State Relays
Training Sessions

Introduction to Relays – 8 minutes
Explains the purpose of protective relays in a T&D system. Describes five common relay elements and explains how each works.

Overcurrent Relays – 11 minutes
Describes the condition that causes an overcurrent relay to operate. Describes the basic operating principles of overcurrent relays.

Directional Overcurrent Relays – 11 minutes
Identifies T&D equipment typically protected by directional overcurrent relays. Describes the basic operating principles of directional overcurrent relays and the conditions that cause them to operate.

Reclosing Relays – 7 minutes
Describes the function and basic operating principles of reclosing relays.

Voltage Relays – 5 minutes
Identifies the type of equipment that voltage relays typically protect. Describes the basic operating principles of voltage relays, and the conditions that cause them to operate.

Auxiliary Relays – 5 minutes
Describes the basic functions and operating principles of auxiliary relays.

Solid-State Relays – 7 minutes
Describes the basic operating principles of solid-state relays. Defines these terms: analog signal, digital signal, and logic circuit.