IEEE PC37.92/D14 is an unapproved IEEE draft standard focused on analog inputs to protective relays from electronic voltage and current transducers. It addresses how these signals are handled in power-system protection applications, helping define a clearer path for consistent interface expectations, relay behavior, and engineering review. As a draft standard in the Power, Energy and Industry Applications area, it is most relevant where accurate measurement and dependable protection performance are essential.

About IEEE PC37.92/D14

This technical document outlines draft requirements for analog inputs that protective relays receive from electronic voltage and current transducers. In practice, that means it sits between sensing equipment and relay functions, where signal compatibility and interpretation can affect protection outcomes. IEEE PC37.92/D14 is intended for engineering teams that need a common reference while evaluating design approaches, testing methods, and interface expectations in relay-based protection systems. Because it is an inactive draft, it is best used with care and in context.

Where is IEEE PC37.92/D14 used?

IEEE PC37.92/D14 is most relevant in electric power protection settings that use electronic transducers to feed protective relays. Typical use cases may include substation protection, feeder protection, and other utility or industrial power applications where voltage and current measurements must be transferred reliably into relay inputs. It can also matter during equipment specification, interoperability review, and acceptance testing for systems that depend on accurate analog signal handling rather than direct conventional instrument transformer connections.

Importance in practice

In practice, this draft standard helps reduce uncertainty around how analog input signals should be treated in protective relay applications. Clear expectations can support better design control, more consistent procurement decisions, and more meaningful testing of relay inputs and transducer interfaces. For power-system protection, even small signal errors can affect timing or trip decisions, so having a technical reference like IEEE PC37.92/D14 may help engineers compare equipment, document assumptions, and lower integration risk.

• Analog inputs for protective relays
• Electronic voltage transducer interfaces
• Electronic current transducer interfaces
• Power-system protection applications
• Draft guidance for design and testing