Lead has been determined to be a hazardous substance and the use of tin/lead solders are being restricted by government laws and regulations such as the European Union's RoHS Directive (Restriction of Hazardous Substances).
Powerful network equipment is finding its way into the domain of the Plain Old Telecom System (POTS) Central Office.
Initial and operating costs can generally be reduced and system reliability increased by incorporating a relatively simple DC UPS as an integral part of the data processing or communication equipment.
Improved components, technology and packaging / cooling concepts have reduced the size (watts/cubic-inch), weight (watts/pound) and initial cost (dollars / watt) of power support with improved reliability and reduced maintenance (i.e., lower new system goals of smaller, lighter and cheaper, along conversion products. When implemented properly, these can reduce operating cost.
TDI has developed several alternative equipment design and construction techniques for highly reliable power conversion, compatible with increasing environmental stress levels. The availability of this type of equipment opens up new alternatives for system cost and reliability optimization.
This paper compares single-phase and three-phase circuits from the component count, stress level and complexity standpoints. It demonstrates that when these items are taken into account, quite often the best choice is a combination of single-phase modules, configured to balance individual power line phases
HASS is especially productive in power conversion equipment, where component stress levels are typically more aggressive than found in other products. TDI has been instrumental in establishing HASS as a viable, high value-add production process.
The paper provides information on the characteristics of batteries, particularly Valve Regulated Lead Acid, environmental aspects and practical system configurations available for recharge control in battery backed DC power solutions.system architects designed to provide.
