IEEE PC62.72/D5

IEEE PC62.72/D5 is a draft IEEE guide for applying surge protective devices to low-voltage AC power circuits rated 1000 volts or less. It addresses how surge protection is selected and applied in power, energy, and industry applications where transient overvoltage can affect equipment performance and reliability. As a draft technical document, IEEE PC62.72/D5 is useful for engineers and specifiers who need a structured reference for practical surge protection decisions.

About IEEE PC62.72/D5

This draft guide focuses on the application of surge protective devices in low-voltage AC power systems rather than on generic electrical protection topics. It is intended to support engineering judgment around device placement, system coordination, and suitability for circuits that operate at 1000 volts or less. In practice, IEEE PC62.72/D5 helps frame how surge protection is considered in relation to electrical distribution, connected loads, and expected transient exposure within power-related installations.

Where is IEEE PC62.72/D5 used?

IEEE PC62.72/D5 is most relevant in low-voltage AC distribution environments where surge protective devices are used to help protect electrical and electronic equipment. That commonly includes facility power systems, industrial control panels, utility-adjacent installations, and other power, energy, and industry applications with sensitive loads. The guide may also be useful during system design, retrofit planning, and equipment specification when surge exposure and protection coordination need to be addressed in a consistent way.

Importance in practice

In practice, IEEE PC62.72/D5 supports more consistent decisions about surge protection in low-voltage power circuits. Using a defined guide can help reduce confusion during design review, procurement, and testing by aligning expectations for device application and system compatibility. It is especially valuable where reliability and equipment continuity matter, since poorly applied surge protective devices can limit performance or leave circuits underprotected. For organizations working in power systems, it offers a reference point for technical control and risk reduction.

• Low-voltage AC circuits, 1000 volts or less
• Application guidance for surge protective devices
• Power, energy, and industry installations
• System design and protection coordination
• Draft IEEE technical reference