IEEE 387-1995

387-1995 is a nuclear engineering standard for generator units applied as standby power supplies for nuclear power generating stations. It addresses the technical expectations for backup generation that supports essential station functions when normal supply is unavailable. In this context, the standard is important because standby power must be dependable, properly integrated, and suited to the safety-related needs of a nuclear facility. As a superseded English-language document, 387-1995 remains relevant for historical reference and legacy equipment review.

Overview of 387-1995

387-1995 focuses on generator units used as standby power supplies in nuclear power generating stations, where continuity of electrical support can be critical. The document is best understood as a technical specification for designing, evaluating, or reviewing generator-based backup systems in a nuclear setting. It may cover performance expectations, interface considerations, and operating reliability for auxiliary power use. For engineers and procurement teams, the standard provides a structured reference for comparing equipment and confirming that standby generation is appropriate for the intended service.

Typical use cases

This standard is typically used when specifying or assessing standby generator units for nuclear plant electrical systems, including emergency or auxiliary power applications. It may support design reviews, equipment procurement, and maintenance planning for generator sets that must respond reliably during loss of normal power. Facilities teams, electrical engineers, and compliance staff may consult 387-1995 when checking whether a generator unit fits the station’s technical and operational requirements. It is especially relevant where dependable backup supply is part of plant safety and continuity planning.

Why it matters

In nuclear power applications, standby generation is not just a convenience; it is part of controlling operational risk. 387-1995 helps create a clearer basis for engineering decisions, acceptance checks, and documentation tied to backup power equipment. Using a defined standard can improve consistency between design intent and delivered equipment, reduce ambiguity during procurement, and support more reliable compliance reviews. For a superseded standard, it also provides useful context when evaluating existing installations or legacy specifications against earlier requirements.

• Standby generator units
• Nuclear power generating stations
• Backup electrical supply
• Legacy technical reference
• English-language standard