How to Implement Logic in Protective Relays - Pushbutton Enable/Disable Using an SEL-421 Relay

Опубликовано: 08 Апрель 2026
на канале: Romero Engineering Company

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In this video we discuss how to use digital logic in modern microprocessor-based protection relays, such as the SEL-421 relay.

We go over how to program an Enable/Disable function using front panel pushbuttons and latches and show how this works in real life.

This video is excerpted from Romero Engineering Company's Protective Relay Logic online course. Check out the full course at:
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