The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The main focus of this paper is to analyze the reactive flow LED front lamps to sodium vapor lamps. With the advances of technology, there is an increase in the use of electronic loads in all sectors, and in this context fits the LED lamp, which has been used in electrical efficiency projects. Both laboratory and field measurements using LED lamps, and meters indicate that a reactive power flow injected...
This article aims to analyze the electrical efficiency and power quality effects of the swap of incandescent bulbs for fluorescent bulbs in low-income Consumer Units. This article uses computer simulation, applying software in Excel, to analyze the implementation of the energy efficiency project in low-income households. The program uses measurements made on a sample of the total benefitted consumers...
This paper analyzes the use of a set of electronic loads, specifically tubular and compact fluorescent lamps with electronic ballasts to offset the reactive excess of an inductive load, as well as its possible impact on existing rules of charging. In laboratory measurements using CFLs was observed a capacitive reactive power flow to the source. When added in parallel to a bank of inductors, the power...
The use of frequency converters in induction motor drive centrifugal pumps allows controlling the flow discharge systems provided by pumping through the rotation of the pump. The method of controlling the flow through the pump rotation, in terms of energy efficiency is much more effective in the reduction of electric power consumption and active power demand of the control method done by adjusting...
The objective of this paper is to analyze the replacement of conventional air conditioner for air conditioner driven by frequency converter in a Consumer Unit (CU) used for public service activities, which carries in addition to increased energy efficiency, positive impact on invoice for electric power of CU. However, when observing the effects of the use of the frequency converter on the electric...
This paper aims to present and discuss matters related to the specification, design, construction, modeling and testing of a 3 MVAr - 34,5 kV Saturated Core Reactor (SCR). This equipment has been considered attractive for controlling the increase of busbar voltage, which occurs in electrical power systems. Although smaller units have been built and successfully operated, this work focuses a real scale...
The constant technological developments in radio since the discovery of the first experiments by Guglielmo Marconi, plus the contributions of the inventions of James Maxwell and Heinrich Hertz, made the radio became a vehicle of mass communication. With the success of radio and the evolution of electronics that began with the three-way transmission and later with the discovery of the transistor, a...
The processing of information through the use of digital equipment and computer technology is largely responsible for the technological advancement, which has reflected in the improvement of the quality of life of the population. As a consequence, there was an increasing use of nonlinear loads in all sectors, particularly in systems for broadcast TV. The knowledge of the response of these loads is...
The main focus of this paper is to analyze the process of bucket elevator drive through line start and commands with frequency inverters. The modern commands use microprocessor systems that can reduce active power consumption and demand of real power. However there is concern about the harmonic distortion by response to those loads on the system. This paper presents laboratory measurements of a system...
The use of computers as a tool for information processing is one of the reasons that explain the rapid technological advancement experienced in recent decades. This finding, if applied to systems that allow the monitoring of the planet, may it be by air, sea or land or by the diagnosis of the climate behavior are fundamental to safety and improving the quality of living. From the standpoint of electrical...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.