IEEE C37.104-2002

IEEE C37.104-2002 is a technical guide for automatic reclosing of line circuit breakers on AC distribution and transmission lines. It addresses how reclosing practices are applied in power systems where transient faults are common, helping engineers evaluate when and how to restore service after a trip. For utilities and related power applications, this standard supports more consistent reclosing design, coordination, and operating decisions while helping reduce unnecessary outages and equipment stress.

What is IEEE C37.104-2002?

This standard provides guidance on automatic reclosing for line circuit breakers used on AC distribution and transmission lines. IEEE C37.104-2002 focuses on the technical considerations involved in reenergizing a line after a protective interruption, especially where temporary faults may clear on their own. It is relevant to system planning, protection coordination, and breaker operation practices, offering a structured reference for engineers who need to apply reclosing in a controlled and reliable way.

Where is IEEE C37.104-2002 used?

IEEE C37.104-2002 is used in utility and industrial power systems that rely on line circuit breakers to clear faults and then restore service automatically. It is especially relevant on overhead AC distribution and transmission lines, where transient events such as weather-related faults can interrupt service briefly. The guide may also support protection engineers, substation teams, and system operators who coordinate reclosing settings, breaker duty, and restoration procedures.

Why is IEEE C37.104-2002 important?

This guide helps bring consistency to reclosing practice, which matters when protecting lines while maintaining service continuity. IEEE C37.104-2002 can support safer operating decisions, better coordination between protection devices, and more predictable breaker behavior during fault recovery. It is useful for reducing avoidable interruptions, limiting mechanical and electrical stress on equipment, and improving compliance with established engineering expectations in power system design and operation.

• Automatic reclosing guidance
• Line circuit breaker applications
• AC distribution and transmission lines
• Protection coordination reference
• Superseded English-language standard