Revision of IEEE Std 946-1992. Guidance for the design of the DC auxiliary power systems for nuclear and non-nuclear power generating stations is provided by this recommended practice. The components of the DC auxiliary power system addressed by this recommended practice include lead-acid storage batteries, static battery chargers, and distribution equipment. Guidance for selecting the quantity and types of equipment, the equipment ratings, interconnections, instrumentation, control and protection is also provided.
- Sponsor Committee
- PE/ESSB - Energy Storage & Stationary Battery Committee
Learn More - Status
- Superseded Standard
- PAR Approval
- 1999-03-18
- Superseded by
- 946-2004
- Superseding
- 946-2004
- Board Approval
- 2004-12-08
- History
-
- Published:
- 2005-06-08
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More - Sponsor Committee
- PE/ESSB - Energy Storage & Stationary Battery Committee
Learn More - Working Group
-
WG_946 - DC System Design Working Group
Learn More - IEEE Program Manager
- Michael Kipness
Contact - Working Group Chair
- Haissam Nasrat
P946
Recommended Practice for the Design of DC Power Systems for Stationary Applications
This recommended practice provides guidance for the design of stationary dc power systems and their associated passive or active protection. General principles of coordination of protective devices for selective tripping are discussed. The components of the stationary dc power system addressed by this recommended practice include: nt- Storage batteries nt- Static battery chargers/rectifiers (including sizing) nt- Distribution equipmentnt- Protection equipmentnt- Control equipmentnt- Interconnectionsnt- InstrumentationnFor applications such as uninterruptible power supply systems (UPS), only protection is included.nGuidance is also provided for selecting the quantity, types and ratings of equipment.nThe considerations of each of these different components and the issue of load voltage and other load specifics are discussed in terms of their effect on the design of the whole system. Guidance on short-circuit calculation and contribution of different dc power system components is also offered to improve reliability, performance and safety of the installation.nThe following applications are not covered by this standard:nElectrically self-contained ac-ac equipment and the following components of the dc power system, with the exception of how they influence the dc power system design, are specifically excluded from the scope of this recommended practice:n - The ac power supply to the battery chargers/rectifiersn - Sizing of photovoltaic, wind, and other alternative power systemsn - Loads served by dedicated engine starting battery systemsn - Applications requiring dc voltage supply above 2000 V nominaln - Motor generator setsn - Internal protection used in certain battery systems. For example: a self-contained protection system that may be incorporated within the battery pack.nSeparate systems are usually recommended for the following special service applications, and are not within the scope of this document:nt- Engine (cranking) startingnt- Emergency lightingnt- Fire detection and annunciationnt- Fire protection actuation
946-2020
IEEE Recommended Practice for the Design of DC Power Systems for Stationary Applications
Recommended practices for the design of dc power systems for stationary applications are provided in this document. The components of the dc power system addressed by this document include lead-acid and nickel-cadmium storage batteries, static battery chargers, and distribution equipment. Guidance in selecting the quantity and types of equipment, the equipment ratings, interconnections, instrumentation and protection is also provided. This recommendation is applicable for power generation, substation, and telecommunication applications.
No Superseded Standards
No Inactive-Withdrawn Standards
No Inactive-Reserved Standards