IEEE Organizations related to Valve Regulated Lead-acid (vrla)

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Xplore Articles related to Valve Regulated Lead-acid (vrla)

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IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Amendment 1: Updated VRLA Maintenance Considerations

IEEE Std 1188a-2014 (Amendment to IEEE Std 1188-2005), 2014

New guidance to users dealing with premature capacity failures with VRLA batteries and updated definitions are addressed in this amendment.


IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Amendment 1: Updated VRLA Maintenance Considerations

IEEE P1188a/D3, January 2014 (Amendment to IEEE Std 1188-2005), 2014

New guidance to users dealing with premature capacity failures with VRLA batteries and updated definitions are addressed in this amendment.


IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Redline

IEEE Std 1188-2005 (Revision of IEEE Std 1188-1996) - Redline, 2006

This recommended practice is limited to maintenance, test schedules, and testing procedures that can be used to optimize the life and performance of valve-regulated lead-acid (VRLA) batteries for stationary applications. It also provides guidance to determine when batteries should be replaced.


IEEE Guide for Selection of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Redline

IEEE Std 1189-2007 (Revision of IEEE Std 1189-1996) - Redline, 2008

This guide describes methods for selecting the appropriate type of valve- regulated, immobilized-electrolyte, recombinant lead-acid battery for any of a variety of stationary float applications. The purpose of this document is to ensure that the reader is aware of all significant issues that should be considered when selecting VRLA batteries, so that the user might make an informed decision.


IEEE Guide for Selection of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications

IEEE Std 1189-1996, 1996

Methods for selecting the appropriate type of valve-regulated, immobilized- electrolyte, recombinant lead-acid battery for any of a variety of potential stationary float applications are described in this IEEE standard.


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Educational Resources on Valve Regulated Lead-acid (vrla)

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IEEE-USA E-Books

  • IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Amendment 1: Updated VRLA Maintenance Considerations

    New guidance to users dealing with premature capacity failures with VRLA batteries and updated definitions are addressed in this amendment.

  • IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Amendment 1: Updated VRLA Maintenance Considerations

    New guidance to users dealing with premature capacity failures with VRLA batteries and updated definitions are addressed in this amendment.

  • IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Redline

    This recommended practice is limited to maintenance, test schedules, and testing procedures that can be used to optimize the life and performance of valve-regulated lead-acid (VRLA) batteries for stationary applications. It also provides guidance to determine when batteries should be replaced.

  • IEEE Guide for Selection of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications - Redline

    This guide describes methods for selecting the appropriate type of valve- regulated, immobilized-electrolyte, recombinant lead-acid battery for any of a variety of stationary float applications. The purpose of this document is to ensure that the reader is aware of all significant issues that should be considered when selecting VRLA batteries, so that the user might make an informed decision.

  • IEEE Guide for Selection of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications

    Methods for selecting the appropriate type of valve-regulated, immobilized- electrolyte, recombinant lead-acid battery for any of a variety of potential stationary float applications are described in this IEEE standard.

  • IEEE Recommended Practice for Installation Design and Installation of Valve-Regulated Lead-Acid Batteries for Stationary Applications

    This recommended practice provides guidance for the installation and installation design of valve-regulated lead acid (VRLA) batteries. This recommended practice is intended for all standby stationary installations. However, specific applications, such as emergency lighting units and semi- portable equipment, may have other appropriate practices and are beyond the scope of this recommended practice. Alternative energy applications are not covered.

  • Development of on-line monitoring system for Valve Regulated Lead Acid (VRLA) battery

    Valve Regulated Lead Acid (VRLA) batteries have been used as backup powers supply since 1994 in almost every sector of the Indian Telecom. Such an excessive usage of VRLA batteries necessitates that a reliable telecommunications power supply is maintained. Since the Valve Regulated Lead- Acid battery is effectively sealed in that it is not possible to examine the battery internally. Therefore any test method relies on monitoring at the battery terminals. The maintenance regime must monitor the operating environment of the battery system as the correct environment will ensure that the maximum reliable operating life is achieved. Telecom standby power systems being installed or modernized today primarily use VRLA batteries, and their use in applications where flooded batteries could not be used, has been accompanied by reports of VRLA batteries not meeting customer expectations in the areas of reliability and service life. Thus taking into account all the aforementioned agendas, and understanding the desire need of the hour, an effort has been made to design a monitoring system for continuous on-line charging level of voltage monitoring of VRLA Batteries.

  • Lifetime extension of valve regulated lead acid (VRLA) batteries under hybrid vehicle duty

    This paper presents some of the results of a foresight vehicle link research project, exploring the possibility of lifetime extension of valve regulated lead acid (VRLA) batteries under hybrid-vehicle duty cycles. The work shows that by the addition of a second set of terminals to a commercially available spiral wound cell, during manufacture, it is possible to improve the cells performance to a degree whereby it can meet the needs of a hybrid-electric vehicle. It is then shown that by the periodic application of a simple conditioning routine the lifetime of a pack of these modified cells may be dramatically improved. Results from a long-term test of a pack of modified cells are presented outlining cell-to-cell variation and capacity loss. The paper gives an in depth analysis of the whole test series including comparisons of the VRLA results with those from the standard nickel metal hydride (NiMH) battery pack removed from the test vehicle and installed on the test bench.

  • A new battery plant configuration that eliminates thermal runaway in valve regulated lead-acid batteries

    The traditional battery plant, originally intended for use with flooded lead acid batteries, is widely used in battery plants employing valve regulated lead acid, VRLA, batteries. However use of the traditional plant can lead to thermal runaway in VRLA batteries if the plant is deployed in an uncontrolled environment. Use of temperature compensated float voltage will tend to decrease the probability of thermal runaway, but can also shorten the life of the batteries if the float voltage is lowered too much. This paper introduces a battery plant configuration specifically designed for plants employing valve regulated lead acid batteries in uncontrolled environments. During float operation, the battery float current is limited. However the batteries are on line and isolated from the plant via a parallel combination of a diode and a contactor. Once the batteries are isolated from the rectifiers, a small charger that can be either a constant voltage or a constant current source, and requires less than 8 watts of power for up to four 48 volt strings of 12 volt, 100 ampere hour batteries, cycles through every battery in the plant and maintains each battery in its required float voltage range. This small amount of power is all that is required to maintain every battery in the plant at its required float voltage. Variations of the new plant configuration are discussed. These configurations of the new plant make this scheme easily adaptable to older technology rectifiers and plants as well as rectifiers and plants employing the latest technology.

  • Life prediction for valve regulated lead acid batteries from early current/voltage data

    Summary form only given. As valve regulated lead-acid (VRLA) batteries age, they demonstrate a predictable drop in end-of-charge voltage and concomitant rise in end-of-charge temperature. This is attributed to the increasing dominance of the oxygen recombination cycle, which results from the negative plate not being fully charged over several cycles. Unchecked, the battery at its end of life experiences a collapse in end of charge voltage, and may even go into thermal runaway. Once the end-of-charge voltage begins to crater, the battery life expectancy is short. Usage of the current interrupt (CI) technique forestalls the inevitable end of life. Nonetheless, there remains the difficult issue of finding an early predictor of battery life. This issue was studied under ALABC Project No. B-007.2. Data from two different algorithms, the Optima-recommended "normal charge" consisting of a constant voltage with a constant current overcharge (CV/CC), and a current interrupt (CI) charge were evaluated for signs of an early life predictor. An interesting pattern of an increase then drop in end-of-charge voltage accompanied by a surge then leveling out of capacity was identified 15% to 20% into the cycle life for both CV/CC and CI algorithms. The pattern proved predictive for the CV/CC cycle lives of several batteries, while the voltage surge as a predictor of CI cycle life depended completely on the specific algorithm. Characterization was also hampered by limited replicates. It is not known why this early voltage behavior occurs.



Standards related to Valve Regulated Lead-acid (vrla)

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IEEE Guide for Optimizing the Performance and Life of Lead-Acid Batteries in Remote Hybrid Power Systems

This guide provides rationale and guidance for operating lead-acid batteries in remote hybrid power systems, taking into consideration system loads and the capacities of the system’s renewable-energy generator(s), dispatchable generator(s), and battery(s). It also provides guidance for selecting an appropriate lead-acid battery technology for various system operating strategies.


IEEE Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead-Acid (VRLA) Batteries for Stationary Applications


IEEE Recommended Practice for Sizing Lead-Acid Batteries for Stand-Alone Photovoltaic (PV) Systems

This recommended practice describes a method for sizing both vented and valve-regulated lead-acid batteries in stand-alone PV systems. Installation, maintenance, safety, testing procedures, and consideration of battery types other than lead-acid are beyond the scope of this recommended practice. Sizing batteries for hybrid and grid-connected PV systems is beyond the scope of this recommended practice. Recommended practices for the remainder ...


Recommended Practice for Installation Design and Installation of Valve-Regulated Lead-Acid Batteries for Stationary Applications

This document provides recommended design practices and procedures for storage, location, mounting, ventilation, instrumentation, preasembly, assembly, and charging of valve-regulated lead-acid (VRLA) batteries in stationary applications.



Jobs related to Valve Regulated Lead-acid (vrla)

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