IEEE PC37.108/D2.22, May 2020 is a draft guide focused on the protection of secondary network systems, with attention to the communication, networking, and power-system issues that affect dependable operation. It is relevant where networked electrical distribution equipment must coordinate under fault and operating conditions, especially in complex secondary network arrangements. By addressing protection practices for these systems, IEEE PC37.108/D2.22, May 2020 helps support safer design decisions, more consistent engineering review, and clearer expectations for system performance.

About IEEE PC37.108/D2.22, May 2020

This IEEE draft guide provides technical direction for understanding and applying protection concepts in secondary network systems. Its scope is tied to the interaction of power distribution equipment, protective devices, and the communication or control considerations that can affect network behavior. As a draft document, it is especially useful for engineers evaluating protection philosophy, coordination, and operating reliability in secondary network environments. The guidance is most valuable when consistency of design and clarity of protection intent are important.

Where is IEEE PC37.108/D2.22, May 2020 used?

IEEE PC37.108/D2.22, May 2020 is typically used in the planning, review, and protection design of secondary network systems found in distribution networks and related electrical infrastructure. It may apply to utility network feeders, network transformers, protective relaying studies, and coordination work involving equipment that serves interconnected low-voltage or secondary distribution arrangements. The document is also relevant where communication and networking considerations influence protection behavior, testing approaches, or operational coordination across connected devices.

Importance in practice

This standard matters because protection for secondary network systems must be coordinated carefully to reduce the risk of unwanted interruptions and to support dependable fault response. Using IEEE PC37.108/D2.22, May 2020 can help engineers align design decisions with a recognized technical guide, improving consistency during specification, review, and procurement. It may also support testing and maintenance planning by clarifying how protection principles should be applied in networked power systems where performance and reliability are closely linked.

• Secondary network protection guidance
• Coordination and operating reliability
• Networked power-system applications
• Communication-aware protection context
• Engineering review and testing support