UPS system battery maintenance

by:AGM lithium battery     2020-07-18
Every Uninterruptible Power Supply (UPS) system comes having a battery which is essential as to the overall design and availability of the critical power system although UPS hardware itself. Static UPS technology is now usually one of the strongest elements in the successful a standby power body. It then falls to battery - at the heart of the ups - to ensure that overall system works first time, every time.
Life expectancy, equipment safety and ultimately, the system reliability often depend inside the type of individual battery blocs supplied with the UPS. Batteries must be properly sized, applied, installed and then maintained (and of course kept in an environmentally friendly condition) certain that they work efficiently and achieve design and expected life ratings.
There are numerous situations that can reduce a battery's life and on the inside worst case, stop it from functioning at optimum efficiency or cause a hazard under failure conditions. When looking at causes of premature battery system failure, many are triggered along with a well intentioned attempts to lessen costs at the various stages of a battery's life from initial installation through to ongoing maintenance and potential remedial engineering in the case associated with the unexpected bloc failure.
A battery should be installed in a suitable environment with a stable temperature. Problems are often encountered where batteries are subjected to large swings in temperature. If regular maintenance, throughout the year, isn't carried out the battery tends to be overcharged through the summer and undercharged through the icy. These factors dramatically affect the longevity of the battery installation and can extend to premature failure. It's a well reported fact that or every 5C above normal operating conditions 20 - 25C battery life could be halved.
To keep it in optimum condition a regular preventative system maintenance ought to performed on battery - not just an 'inspection' only one where the objectives are to clearly identify and rectify issues such greater ripple currents which advance the aging of the battery. On many UPS systems, this symptom could be caused by a temporary high loading for this inverter itself. Generally also be attributed to the progressive failure of the dc smoothing capacitors a rectifier circuit.
A large battery installation on an UPS system any sort of age may be seen to have a married couple of blocs faulty or indeed showing all the normal signs of time of gassing, venting, corrosion or dramatic intercell impedance changes. However, depending upon this of the system and / or the percentage of battery string that has failed, it may be far more economical as well as safer, to replace the entire string rather than attempt a 'sticking plaster' type repair, despite apparent temptation. There is limited 100% foolproof involving determining if the computer will respond using a single bloc or complete change in advance. It's all down to the system, environment and the engineering competency of the remedial engineering.
Example:- By inserting two or three new blocs into a battery that is three to 4 years old will certainly accelerate the aging of the new blocs as contain to work harder to compensate for the older, weaker blocs in the . Equally, experience has shown that every few months, a couple of blocs would then have to be changed leading with user who might lack of confidence in the system (or the supplying company).
A battery end up being be maintained by solution provider who understands the total application that is actually always being used for and has visibility of many other external factors. Appropriate testing needs in order to become carried out and it is essential that where load exams are undertaken, the battery is tested because of its correct application.
There is limited value in testing a battery within an UPS application at constant current rate (telecom application) where in reality it's application is one of constant power means. This can cause the tester to fail or pass a battery bank inappropriately causing additional expense time, and placing the customer at-risk whilst under evaluation.
Over the years, many reams of paper have been spent discussing established track record merits of one strategy over the other as the ideal way of testing a battery. Surprisingly both methods their very own advantages and both are correct for differing applications. In a serious event lighting application the batteries are discharged into a load, rather than being impedance tested. Whereas in an UPS application it could be advantageous to employ impedance testing primarily because does not deprive a short duration battery of precious backup time.
For consistency of interpretation by the user, it is also essential when carrying out impedance testing how the same test is conducted each visit. It is not uncommon to check last visit data with current visit data and come up with inaccurate () conclusions because the engineering company concerned has tested the car battery at different rates or that the probes have been connected to the wrong end of a strap. Such detail can make all the difference!
A trusted maintenance provider will employ trained test engineers who can carry out repeated tests, months apart, to exact same way standard to allow data to be analysed for trends, and thus permit correct remedial sex.
Permanent battery monitoring used to be only within the budgets of those with the largest battery systems, or having the biggest risk to avoid. Finally, there are several niche products available possess brought the associated with monitoring within the reach of most reasonable sized battery installs. Whilst there are several technologies employed with various manufacturers, it is often down to the critical power provider to understand exactly what the client wants to accomplish from permanent monitoring before a solution can be said.
Permanent battery monitoring can be reduce insurance costs as it constantly monitors the battery and alerts consumer as soon regarding abnormality is detected, thus preventing downtime and loss.
A good maintenance solution provider will understand the demands of virtually every industry and offer a range of contract services embracing planned preventative maintenance and call out service in any involving 1-12 visits 12 months. It will give you the appropriate battery for that application.
Even if is not maintaining the equipment connected to the battery, it ought to competent with this system so that it is able to present you with a battery replacement facility that is the best. It will also provide; Full Risk Assessment Surveys; Full Battery Installation Design; Bespoke enclosures and charging systems; Batteries with various conformities: - 5 & 10 year Design Lives and Wet Cell testing. Of course, all these things demand an engineering led approach compared to one driven purely from a financial perspective.
In conclusion whilst the short term financial advantages obtaining battery maintenance finished in cheaply may look attractive, a responsible maintenance provider end up being conscious of wellness of life price a battery system and should offer appropriate maintenance regimes and remedial recommendations'
About the author: - Rob Tanzer is Tech support team Manager for Chloride UK UPS Methods. He gained his degree in Electronics Engineering at Rugby College of Engineering Technology and following a few years working on Process Control and Automation Industry he joined the UPS division of Emerson Electric. Rob has worked within the UPS niche for over many and having held positions within a number of organisations, he has amassed an abundance of practical knowledge and technical knowledge on many of the different types of static and rotary UPS systems which have been in service today. His experience isn't confined to computer and data centre applications; too as providing technical support for Chloride, Rob recently been instrumental in developing UPS systems for several special applications where there a key requirement for your UPS systems to are in accordance with specific external environmental risks.
Rob could be the author for many published technical papers covering UPS systems, thyristor power switching devices and different factors of UPS systems applications
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