IEEE C93.5-2021

IEEE C93.5-2021 is a technical standard for power line carrier transmitter and receiver equipment used to transfer discrete teleprotection signals. It defines requirements that help ensure these communication units operate reliably in power and energy applications where fast, dependable signal transfer can affect system coordination. For engineers, buyers, and specifiers, the document is useful for understanding the expected performance and design considerations for this specialized equipment.

IEEE C93.5-2021 overview

This standard addresses the requirements for transmitter and receiver equipment that use power line carrier methods to carry discrete teleprotection signals. In practical terms, IEEE C93.5-2021 supports the design, evaluation, and selection of equipment intended for protective relaying and related control functions on power systems. The document is relevant to component, circuit, device, and system-level work where dependable signal transfer over power lines is important. It helps define a consistent technical basis for comparing products and checking compliance.

Typical use cases

IEEE C93.5-2021 is commonly used when specifying or assessing power line carrier equipment for teleprotection links between substations or other grid assets. It may be applied in protective signaling paths that support line clearing, relay coordination, or remote tripping functions. The standard is also useful during equipment procurement, acceptance testing, and engineering review for utilities and related power system installations. In these settings, the focus is on reliable discrete signal transfer across the communications channel.

Why this standard matters

For equipment that supports teleprotection, clear requirements help reduce uncertainty in design and procurement. IEEE C93.5-2021 gives stakeholders a common reference for performance expectations, which can improve consistency across transmitter and receiver products. That consistency matters when testing equipment, comparing supplier offerings, or checking whether a device is suitable for a protection scheme. By setting a defined technical baseline, the standard can help lower risk in applications where communication reliability is closely tied to system response.

• Power line carrier transmitter and receiver equipment
• Discrete teleprotection signal transfer
• Protective relaying and remote tripping support
• Design, testing, and procurement reference
• Power and energy system applications