IEEE 946-1992
IEEE Recommended Practice for the Design of DC Auxiliary Power Systems for Generating Stations
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About This Item
IEEE 946-1992 is a recommended practice for the design of DC auxiliary power systems for generating stations. It addresses how direct-current support power is planned and integrated within power-generation facilities, helping designers evaluate reliability, arrangement, and operating needs. For stations in the power, energy, and industry applications field, this standard can support more consistent engineering decisions for essential control and backup functions where dependable DC power is important.
Overview of IEEE 946-1992
This standard focuses on the technical considerations involved in designing DC auxiliary power systems used in generating stations. IEEE 946-1992 is intended to guide engineers through the practical requirements of supplying DC power to station equipment that may need support during normal operation and abnormal conditions. It is particularly relevant where continuity, system coordination, and dependable auxiliary service are important to overall plant operation, helping align design choices with a recognized recommended practice.
Typical use cases
IEEE 946-1992 is commonly used when specifying or reviewing DC auxiliary power arrangements for generating stations, including battery-backed supply systems, control power circuits, and associated distribution equipment. It may be referenced during new plant design, upgrades to station auxiliary services, or evaluation of existing DC systems that support control, protection, and switching functions. The standard is especially useful in engineering workflows that require clear design criteria for reliable station power support.
Why it matters
For generating stations, a well-designed DC auxiliary power system can reduce operating risk and improve consistency across critical support circuits. IEEE 946-1992 helps establish a shared framework for design decisions, which can aid compliance review, procurement, and technical coordination between project teams. Because the standard is marked superseded, it is also useful as a historical reference when assessing legacy installations or understanding the design basis of older station DC systems.
- DC auxiliary power design for generating stations
- Battery and distribution support for station controls
- Reliability-focused engineering guidance
- Legacy system review and design basis reference
- Power, energy, and industry applications
- Publication Date: 1993
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications
- Official IEEE: Doi link
- New Version Available: 946 (2020)
- Previous Version: 946 (2005)
- This Version: 946 (1993)
- Previous Version: 946 (1985)
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