IEEE 485-1978
IEEE Recommended Practice for Sizing Large Lead Storage Batteries for Generating Stations and Substations
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- Language: English
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About This Item
IEEE 485-1978 is a technical guide for sizing large lead storage batteries used in generating stations and substations. It addresses the planning and design questions that arise when a stationary battery must support critical power-system functions, such as control, protection, and emergency operation. By giving engineers a structured method for battery sizing, IEEE 485-1978 helps improve reliability, reduce undersizing risks, and support consistent procurement and specification decisions for power and energy installations.
Overview of IEEE 485-1978
This standard focuses on the recommended practice for determining the capacity of large lead-acid storage batteries in utility and industrial power environments. IEEE 485-1978 is relevant where battery performance must be matched to the demands of generating stations and substations, including expected duty cycles, load profiles, and backup duration. Its guidance is useful when engineers need a defensible sizing basis for stationary battery systems that support essential electrical equipment and operational continuity.
Typical use cases
IEEE 485-1978 is commonly used when specifying battery banks for station service, switchgear control, relay protection, and other direct-current support functions in power facilities. It can help during design reviews for substation DC systems, generator plant auxiliaries, and emergency control circuits where lead storage batteries must deliver dependable standby power. The document is also relevant for equipment selection, replacement planning, and engineering checks that compare load requirements against battery capability.
Why it matters
Proper battery sizing is critical in systems where a shortfall can affect control reliability or interrupt key operations. IEEE 485-1978 supports more consistent engineering decisions by providing a recognized method for estimating required battery capacity under specific service conditions. That helps reduce risk in specification, improve coordination between design and procurement teams, and provide a clearer basis for compliance and performance expectations. For buyers and engineers, the standard offers practical value when evaluating battery suitability for critical power infrastructure.
- Lead storage battery sizing
- Generating station applications
- Substation DC support
- Load and duty-cycle planning
- Standby power capacity checks
- Publication Date: 1978
- Standard Status: Superseded
- Publisher: IEEE
- Subject: Power, Energy and Industry Applications; Components, Circuits, Devices and Systems; Engineered Materials, Dielectrics and Plasmas
- Official IEEE: Doi link
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