IEEE PC37.235/D13, Jan 2021 is an inactive draft guide focused on the application of Rogowski coils used for protective relaying purposes. It addresses how these sensing devices may be used in power, energy, and industrial systems where accurate current measurement supports relay performance. For engineers and procurement teams, this technical document helps clarify application considerations, helping improve consistency when specifying or evaluating Rogowski coil-based relay inputs.

IEEE PC37.235/D13, Jan 2021 overview

IEEE PC37.235/D13, Jan 2021 provides draft guidance for using Rogowski coils in protective relaying applications. The document is relevant to current-sensing arrangements in electrical equipment and systems where relay operation depends on dependable input signals. Its focus is not on general metering, but on the practical use of Rogowski coils in protection schemes. As a draft guide, it may be used to support design review, application decisions, and technical alignment around this specialized measurement approach.

Typical use cases

This standard is typically used when specifying Rogowski coils for protection in substations, switchgear, feeder systems, or industrial power distribution equipment. It may support application work for relay engineers, equipment integrators, and test personnel who need to understand coil placement, signal handling, and suitability for protective functions. IEEE PC37.235/D13, Jan 2021 can also be helpful during evaluation of current-sensing interfaces in new installations, retrofit projects, or studies involving relay coordination and protection performance.

Why this standard matters

IEEE PC37.235/D13, Jan 2021 matters because protective relaying depends on accurate and consistent current inputs. Clear guidance for Rogowski coil application can reduce specification errors, improve design consistency, and support safer protection system behavior. It is also useful for procurement and compliance review, where buyers and engineers need a common reference for technical expectations. In practice, that can help limit integration risk and make testing and acceptance more straightforward.

• Rogowski coil application guidance
• Protective relaying focus
• Current sensing in power systems
• Draft technical reference
• Inactive standard status