IEEE C37.230-2007

IEEE C37.230-2007 is a superseded IEEE guide for protective relay applications to distribution lines. It addresses how relay schemes are applied to distribution line protection, helping engineers align device selection and settings with feeder behavior, fault conditions, and system coordination needs. In power, energy, and industrial electrical systems, that guidance can support safer and more consistent protection design, especially where reliability and fault isolation are important.

IEEE C37.230-2007 overview

This technical document focuses on protective relaying practices for distribution lines, where operating conditions can vary widely and coordination with other components is critical. IEEE C37.230-2007 is intended to guide application decisions rather than define a single equipment design, making it useful for engineers working on protection philosophies, relay setting approaches, and system studies. Its value lies in helping teams apply relay functions in a way that supports dependable line protection and coordinated operation across the network.

Typical use cases

Typical use of this standard includes planning or reviewing relay applications for overhead or underground distribution feeders, substation line protection, and feeder coordination studies. It may also support utility engineering groups, industrial power systems, and consulting teams responsible for protection scheme selection, relay settings, and fault-clearing performance. IEEE C37.230-2007 is especially relevant when comparing protection options for line segments, reviewing how relays interact with downstream devices, or documenting an application basis for distribution protection.

Why this standard matters

Protective relay application guidance helps reduce miscoordination, unwanted trips, and gaps in fault coverage. IEEE C37.230-2007 matters because distribution lines often require careful balancing of sensitivity, selectivity, and operating speed. Using a recognized guide can improve consistency in design reviews, procurement specifications, and testing expectations. It also gives teams a common reference point when evaluating whether a relay application is appropriate for the system conditions and protection objectives involved.

• Protective relay application guidance
• Distribution line protection focus
• Coordination and fault-clearing considerations
• Utility and industrial power system use
• Superseded IEEE technical reference