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| UPSonNet NewsLetter December 2010 |
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Editorial Topic: Insights, Problems & Solutions Learned in 2010.
This editorial presents a short summary of monthly newsletter topics during 2010, enabling readers
to review and reconsider items of interest or close a gap if a topic was missed.
All monthly Newsletters are accessible to UPSonNet members. To view 2010 and earlier
newsletters please Log –In and select the relevant item on the page that opens.
Non members, please Sign-Up.
You can get any specific archived Newsletters for a small pay. Mail to: carole@upsonnet.com
To receive future Newsletters in your e-mail for free,Sign-Up Here.
UPSonNet 2010 monthly Newsletters:
January 2010: UPS Upgrading Costs and Gains
The topic considers the associated costs of UPS upgrading in data centers, by replacing an old UPS
with a new system. A cost effective upgrading routine is suggested, which based on presented
calculation, returns initial investment within 2.5 years, granting about 40% additional income.
February 2010: How Much to Pay for the Best UPS?
UPSonNet survey of single phase online UPS systems reveals enormous differences in
specifications, efficiencies, features and prices, when same size UPS systems from different
manufacturers are compared. The survey indicates that no correlation between performance and
UPS price exists, offering guidance for making a cost effective UPS selection..
March 2010: When the UPS Turns the Power Down
March topic considers Possible UPS failures, which drop the load. The paper considers the reasons
of total UPS failure when utility power is available, the impact of such failure on user's future
decisions to work with the UPS suppliers, as well as the possible remedies to avoid or mitigate
future occurrences.
April 2010: Impact of Backup Batteries on UPS Reliability
The influence of backup battery MTBF on total MTBF of a UPS system is considered, focusing
particularly on three phase systems, where generally the battery bank comprises numerous batteries
connected in series. Preventive battery maintenance and replacement practice is suggested, which
based on presented calculation almost triples total MTBF figure.
May 2010: Best Backup Battery Technology
In search of a battery technology which overcomes the main drawbacks of Lead Acid battery, such
as limited discharge cycles, poor temperature performance, low energy to weight ratio, and
ecological concerns, a new alternative battery, already on the market is presented. Main
Specifications of 280V 60AH Lead Acid battery bank are compared side by side with similar new
battery bank, indicating the distinct technological advantages of the latter.
June 2010: UPS Waveform & New Computer Servers
New computer servers with Active Power Factor Correction (APFC), designed to meet recent
green oriented legislation such as Energy Star, may malfunction when connected to a UPS with
rectangular or semi sinusoidal inverter. The power supplies of such servers are built to work from
pure sinusoidal source, and frequently turn off or trip the server when non- sinusoidal UPS Inverter
voltage, such as supplied by backup UPS and most Line interactive UPS systems is applied.
July 2010: How to Specify an Off Line UPS to Meet Green Oriented Regulations.
Following June's newsletter, specifying of Standby and Line interactive UPS systems is examined.
The article focuses particularly on requirements of UPS output Power Factor and output
waveform, to ascertain proper operation of new servers, which comply with latest green oriented
standards. Based on UPSonNet review, which indicates current difficulty of UPS Off- Line market
to answer users' needs to protect new computers, a solution in locating and selecting a proper UPS
system is offered.
August 2010: How to Drop a Protected Computer when the Lights Go Down.
August topic considers common practices adhered by UPS users, which may eventually drop the
load when the utility power fails. UPS ability to supply power from the utility via the Bypass, brings
frequently about user's unawareness to UPS latent malfunction. The article concerns five main
habits, practiced unknowingly by UPS users, which if not avoided result in load dropping when the
utility power goes down.
September 2010: The Right Power Protection Strategy for Now and the Future
Redundant operation is offered by UPS manufacturers, in order to comply with high reliability
requirements of critical installation, and scalability feature to enable UPS growth to meet future
power demands. Both Redundancy and Scalability are achieved by paralleling UPS systems, which
can be performed only with the original size and make UPS type. In addition, scalability reduces
total reliability and efficiency affecting also other aspects that need consideration. The article
presents possible scenarios that emphasize the importance of strategic approach to UPS protection,
leading to a guide which enables to implement such strategy.
October 2010: Boosting UPS Efficiency with New Design Approach
Most UPS systems can meet basic user's demands; making cost the conclusive element in
customer's decision. Examining high power UPS cost structure reveals that wasted electricity on
running the UPS over its lifetime generally exceeds other cost items, particularly when conservative
static UPS designs which provide 90% efficient systems are compared with new designs offering
95% efficiency. Reconsideration of the classical three phase bridge inverter topology, as well as the
switching components and structure in order to increase UPS efficiency above 95% , is suggested.
November 2010: Life Expectancy of Backup Batteries
November topic investigates Battery life time classification, causes of UPS battery failures, and
maintenance procedure to extend battery life. The article treats such items as: defining battery
lifetime figure, battery failure modes, selection of UPS battery for long lifetime operation, and
Maintenance practices affecting UPS battery lifetime.
UPSonNet Website News
We are in process of preparing new material, which will be presented in 2011. We repeat however,
here certain items already presented in November newsletter, still relevant for the attention of new
subscribers, or anyone that missed taking action:
We are now at the final stage of building a Guide of North American Professional Suppliers and
Service providers. You can add your company to this, now free, service by filling in the
Professional Suppliers Guide Form.
Most Advertisements on UPSonNet website are automatically terminated at the end of the year.
New advertisers are welcome. We are able to offer now preferred placement on most visited pages.
In addition, advertising companies are now entitled for free UPSonNet full year membership. For
more
information please e-mail to: carole@upsonnet.com
UPS Industry News
Holidays and end of year tasks are probably the cause for reduced industry announcements in
December. We would like however to call attention to Eaton's News release about partnership
with Managing Service Providers to offer remote monitoring of UPS and Power components.
Best described by Chris Reid, product analyst with N-able Technologies:
"Having the capability to easily monitor and manage the power and cooling solutions within a client’
s network remotely is a tremendous value for our MSP partners. Power and cooling represent
lifelines for IT networks, and giving N-central users the insight into how those components of the
network are performing is something we’re very excited to bring to market.”
We welcome remarks on any Newsletter issue. Please e-mail to: denis@upsonnet.com
We Wish You and Your Family a Wonderful Year.
________________________________________________________________________________
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Please forward this Newsletter to your friend, that might be interested.
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UPS Upgrading: Costs & Gains
When UPS Turns Power Down
How much to Pay for Best UPS
Backup Battery & UPS Reliability
Best UPS Battery Technology
UPS Waveform & New Computers
Specifying the Right Off Line UPS
How to Drop a Protected Computer
5 Nines Three Phase Scalable UPS
Redesign UPS & Boost Efficiency
Life Expectancy of UPS Batteries