IEEE C37.92-2023

C37.92-2023 defines the energy analog interfaces used between protective relays and power system signal sources. It is a focused technical standard for the signals, characteristics, and interface expectations that help relay systems interpret measurements consistently. In power and industrial control applications, this matters because dependable analog interfacing supports accurate protection behavior, easier integration, and more predictable system performance. C37.92-2023 is most relevant where relay inputs must align with established electrical and signal practices.

C37.92-2023 overview

This standard addresses the interface relationship between protective relays and the signal sources that supply energy-related analog information. Its purpose is to help define how these connections should behave so that measuring and protection equipment can work together with reduced ambiguity. In practice, C37.92-2023 is useful for engineering teams that need a common reference for signal compatibility, interface design, and technical comparison during specification or procurement. It supports clearer expectations for systems used in power-related monitoring and control environments.

Typical use cases

C37.92-2023 is typically used when designing or reviewing relay interfaces connected to current or voltage signal sources in power-system protection schemes. It may apply to substations, utility control equipment, and industrial installations that rely on analog inputs for protective functions, metering coordination, or signal conditioning. The standard can also support engineering work where relay performance depends on consistent source characteristics, interface compatibility, and defined signal handling across components and circuits.

Why this standard matters

For organizations specifying or evaluating protective relay interfaces, C37.92-2023 helps reduce uncertainty around how analog energy signals should be exchanged and interpreted. That can improve design consistency, support compliance reviews, and make testing and procurement decisions more straightforward. In systems where incorrect interfacing can affect protection operation, using a defined standard helps lower technical risk and supports more reliable coordination between devices, circuits, and signal sources.

• Protective relay interface requirements
• Energy analog signal compatibility
• Power system source-to-relay coordination
• Design and testing reference for analog inputs