"Battery options for uninterruptible power supplies" - NASA Tech Briefs, May 2012
A technical and thorough overview of VRLA battery technology and how these batteries are used in UPS technology. Includes details on the VRLA battery's charge and discharge electrochemistry. Also, provides information on factors affecting battery life, such as usage in high temperature environments.
"Online UPS and power distribution challenges" -Electronic Products, March 2012
It is challenging to find the best solution to effectively and reliably power equipment in today's high technology military applications. There are multifunctional COTS online UPS and PDUs that can solve problems in specific environments, like dealing with unstable generator power, high temperature, harsh elements, shock, vibration, etc. This article covers the issues and features to consider when designing a solution for these applications.
"Uninterruptible power supplies and cybersecurity" -Intech, Jan./Feb. 2012
How secure is your network from a hacker? Every network connected device, including a UPS, in a data or SCADA network is a potential backdoor into the network. You'll have the most current information about cybersecurity, including how to protect your network and what to look for in a UPS SNMP agent, as they can differ widely by manufacturer.
"Is your UPS rated for industrial environments?" -Electronic Products, August 2011
A step-by-step guide on what to look for when selecting an on-line uninterruptible power supply (UPS) for use in industrial environments. The UPS must operate flawlessly in a harsh environment for 10-15 years and require minimal maintenance. Most importantly and yet most overlooked is the effect of high temperature - the article discusses how to choose a reliable hi-temp UPS. Other key issues include UPS battery selection, dealing with airborne contaminants, etc.
"Making a Case for Modified COTS" -Defense Tech Briefs, April 2011
This informative article explores developing a modified COTS project that incorporates power protection and conversion. Important issues include ruggedization, environmental factors, and purchasing reliable components from proven products. A case study shows how a large military contactor and UPS company successfully designed a 12kVA power system with unique capabilities to be housed inside a HMMWV’s shelter enclosure.
"Power conditioning: Learn methods, techniques, tradeoffs for effective implementation" -Intech, May/June 2010
There are many devices labeled as “power conditioners” that widely range in price and protection levels. Many users become frustrated with trying products, yet not solving the power problem(s)—leading to wasted time and money. Learn about different power conditioning features and what you require for your specific application—e.g. what is galvanic isolation and do you need this feature?
"Empowered with Uninterruptibility" -Chem.Info, April 2010
What does a major water utility do to ensure a clean water supply? El Paso Water Utility found that clean, stable power was critical for lab equipment to operate correctly. This case study traces how EPWU experimented with lower cost “Smart UPS” for power protection and saved money initially. It describes how they then faced unexplained aborted tests with “no fault” errors and lost time, money and peace of mind. In the end, a high quality on-line UPS resolved the problems and saved EPWU countless hours and dollars.
"The true cost of UPS ownership" -Electronic Products, March 2010
The actual cost of owning an Uninterruptible Power Supply (UPS) is much more than the initial price, especially when the cost of replacing batteries is calculated. This article reviews types of UPS, various battery options available, and how temperature plays a key role in UPS battery life. Readers can thereby make an informed choice about UPS and battery selections.
"The Power of Reliable Results" -Laboratory Equipment, October 2009
Good power quality is essential to obtain reliable laboratory test results—and FEMA backup power guidelines may require power reliability in lab disaster plans. A power quality audit should be done and include every connected instrument. To ensure stable power quality, a backup generator and quality UPS are essential—issues to consider are discussed.
"Does your backup power meet guidelines and mandates?" -MLO Magazine, September 2009
This article examines the importance of backup power to effectively comply with CDC mandates and guidelines for vaccine refrigeration in the Vaccine for Children Program (VFC) and for proper data backup hardware in the Childhood Lead Poisoning Prevention Program (CLPPP).
"Avoiding Power Disturbances" -Lab Manager, June 2009
One of the most overlooked problems in the lab is the utility power source. Lab instruments, such as gas chromatographs (GC), are very sensitive to power problems. Unstable power—especially voltage irregularities--can lead to inaccurate test results and downtime. This article includes an actual real-world graph demonstrating how an on-line battery back-up system (on-line UPS) provides more stable and clean power than the more commonly used commercial backup system.
"Unique COTS application of the double-conversion on-line UPS" -Military Embedded Systems, May 2009
Engineers often use a double-conversion on-line UPS for battery backup requirements. Yet, this technology offers more capabilities that are not often realized. It can be a real problem-solver for a systems design engineer looking to address challenging power issues with new military technology, including frequency conversion and the need for ultra-precision regulation.
"Generator + UPSs: match or bridge to nowhere?" -Electronic Products, March 2009
Small backup generators often solve the need for extended battery backup; however, there is a challenge presented with a UPS. This article addresses the reality that many UPSs are incompatible with generators and can actually stay on battery or drop the connected equipment. The features of an industrial-grade on-line UPS are discussed and how this topology ensures reliable operation with a generator.
Power Frequency Conversion Considerations
This white paper examines the development of power standards and describes, with diagrams, what a frequency converter is and how it works. It also addresses what features to look for in a frequency converter, depending on the needs of a particular application.(click to view complete article)
Selecting the Right Power Protection for Biomedical and Laboratory Instrumentation
There is a significant investment of capital in laboratory instruments, like GC/MS and analyzers. Utility power disturbances can result in lost samples, test inaccuracies and data corruption. This white paper focuses on the power quality requirements of laboratory equipment and how to select the proper power protection device or UPS to maximize throughput.(click to view complete article)