IEEE 487.4-2013

IEEE 487.4-2013 is a technical standard for the electrical protection of communication facilities serving electric supply locations through the use of neutralizing transformers. It addresses a specialized interface between communication, networking, and broadcast technologies and power-sector sites, where unwanted electrical disturbances can affect service continuity and equipment integrity. For engineers, specifiers, and purchasers, this standard helps define a clear protection approach for these facilities and supports more consistent design and evaluation decisions.

IEEE 487.4-2013 overview

This standard focuses on the application of neutralizing transformers as a protection method for communication facilities connected to or serving electric supply locations. In that role, IEEE 487.4-2013 provides a technical framework for reducing electrical exposure that may arise in mixed utility environments. It is relevant where communication paths, control links, or related equipment must operate reliably alongside power infrastructure. The document is useful when selecting protection methods, reviewing system compatibility, or checking whether a design aligns with a recognized engineering practice.

Typical use cases

IEEE 487.4-2013 is typically applied when communication circuits or associated facilities are installed at electric supply locations such as substations, generating sites, or other utility-controlled premises. It may guide the protection of interconnecting communication equipment, signal paths, and related interfaces where electrical disturbances are a concern. The standard is also relevant during system design, retrofit planning, and procurement of protection hardware for communication links that must remain dependable in a power utility environment.

Why this standard matters

Using IEEE 487.4-2013 can help organizations improve consistency in protection design and reduce uncertainty when specifying communication facilities at electric supply locations. A clear standard supports safer engineering decisions, better coordination between power and communications teams, and more reliable compliance reviews. It can also help limit equipment damage, service interruptions, and testing ambiguity by giving stakeholders a common technical reference for neutralizing transformer-based protection. For infrastructure owners, that consistency is valuable in both planning and maintenance.

• Electrical protection for communication facilities
• Neutralizing transformer application
• Utility and electric supply location context
• Communications interface protection
• Engineering and compliance reference