IEEE IEEE PC62.72a/D2, Mar 2020
IEEE Draft Guide for the Application of Surge Protective Devices for Low Voltage (1000 Volts or Less) AC Power Circuits Amendment: SPD Disconnector Application Considerations and Coordination for use in Low Voltage AC (1000 V or Less, 50 or 60 Hz) Power Circuits
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About This Item
IEEE PC62.72a/D2, Mar 2020 is an IEEE draft guide focused on surge protective devices for low voltage AC power circuits, with particular attention to SPD disconnector application considerations and coordination. It is relevant to components, circuits, devices, and systems where protecting 1000 V or less AC installations depends on correct device selection and interface behavior. IEEE PC62.72a/D2, Mar 2020 helps frame how these protective elements are applied so designers can better manage fault coordination and installation reliability.
IEEE PC62.72a/D2, Mar 2020 overview
This draft amendment extends guidance for surge protective devices used in low voltage AC systems operating at 50 or 60 Hz. It concentrates on the role of the SPD disconnector, including how it may be applied and coordinated within an electrical circuit. For engineers and specifiers, IEEE PC62.72a/D2, Mar 2020 offers technical direction that supports consistent design decisions, especially where surge protection must work alongside upstream and downstream protective devices in practical power distribution arrangements.
Typical use cases
This document is commonly used when planning or reviewing surge protection in low voltage AC power circuits, such as panelboards, distribution assemblies, and equipment feeders. It is especially useful where SPDs need coordinated disconnection behavior to help isolate a failed device without affecting the wider circuit. IEEE PC62.72a/D2, Mar 2020 may also support procurement and engineering checks for systems that require clear application guidance for protective components in commercial, industrial, or infrastructure electrical installations.
Why this standard matters
In practice, this guide helps reduce ambiguity around how surge protective devices and disconnectors should be applied together. That matters for compliance-minded design, product selection, and system coordination, because incorrect application can affect protection performance and fault handling. IEEE PC62.72a/D2, Mar 2020 supports more consistent technical review during specification, testing, and installation, helping teams align protection strategy with the needs of low voltage AC networks and related equipment.
- Low voltage AC power circuits
- SPD disconnector application guidance
- Coordination with protective devices
- 50 or 60 Hz system use
- Design and compliance reference
- Publication Date: 2020
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems; Power, Energy and Industry Applications
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