How To Choose Overhead (aerial) Low-voltage Surges Limiters Introduction The analysis of threats coming from atmospherical, connecting and induced surges, etc. should not be carried through pure and simple within the area of the closed facility. Within the multistage surge protection framework, as the first degree of protection, the aerial limiter of the class A (according to VDE 0675) should be provided. Therefore the surge protection analysis should take...... Similar Editorial : Which Should You Choose by daf719. | Source : Advance Technology Systems
Protection Of Electrical Installations When speaking about the protection of electrical installation, the most often meant is the overcurrent protection. This is the protection that must be activated in case of exceedingly high currents in an installation (the currents whose value is higher than expected). It can be achieved using safety fuses, or (automatic) circuit breakers; there are two other names: LS and MCB switches.The task of...... Similar Editorial : Electrical Controls Design Engineer by crackmarketing. | Source : Advanced Audio Technology
New Series Of Etibreak Eb2 In View Of Selectivity What is selectivity?Selectivity in mean of protective devices is also called by other terms as discrimination or coordination of protective devices.To put it simply, coordination means that downstream devices (breakers/fuses) should activate before upstream devices. This minimizes the portion of the system affected by a fault or other disturbance. At the substation level,feeder breakers should...... Similar Editorial : Memories with a View by hunter. | Source : Advanced Audio Technology
Time-control Modular Devices Electrical systems require the general usage of electronic master devices, controlling automated technology systems such as: manufacturing processes, lightings, heating, ventilation etc. Especially wide use of this devices can be found in installations of so called "intelligent buildings". In this year's Trade Fairs "ENERGETAB" 2002 in Bielsko-BiaBa - ETI Polam from PuBtusk introduced the...... Similar Editorial : Time Out by A. Raymond Randall, Jr.. | Source : Advanced Audio Technology
What Are Medium-voltage Zno Overvoltage Surge Arresters Lately, for overvoltage protection in medium-voltage power transmission networks have been more and more used ZnO overvoltage surge arresters with silicon casing.Such arresters are composed of highly nonlinear resistor blocks. Nonlinearity is related to the current through the arrester dependence of the voltage. The arrester resistance is inversely proportional to the voltage applied. In this way,...... Source : Advanced Audio Technology
Tilos Power Disconnectors During last year ENERGETAB Trade Fairs 2005, ETI Polam from Pułtusk presented new group of compact Power Disconectors from TILOS series. This series consists small-gabarit LAS disconectors and isolating LA power disconectors . TILOS power disconectors similarly as over-current compact power ETIBREAK switches , fuse box disconectors (WT-NH) LTL or rail disconectors SL are intended for the energy...... Similar Editorial : The Power of Ice by Louise Roach. | Source : Advanced Audio Technology
Short Circuit Protection In Dc Circuits The importance of use of fuses as protection elements in DC circuits has increased recently. This article deals with some theoretical points and explanations of basic notions in DC circuits. Further on, some of the most common applications are described, where conventional shortcircuit protection is not sufficient enough and special requirements of designers or customers are necessary. Besides...... Similar Editorial : Circuit Training by Deborrah Cooper. | Source : Advanced Audio Technology
Development Trend Of Residual Current Circuit Breakers The paper deals with the directions of the state-of-the-art changes in the field of residual current circuit breakers, with particular emphasis on standards changes due to new requirements of environment, reliability of operation, operation at high frequencies, and use of voltage-dependent switches.Protection switches, or residual current devices are in practice a widely used way of protection...... Similar Editorial : Circuit Training by Deborrah Cooper. | Source : Advanced Audio Technology
Low-voltage Fuses And Circuit Breakers The paper is attempting to describe in a simple way the physical background of low-voltage fuses and circuit breakers operation in conditions of high short-circuit currents. Further, it attempts to draw some conclusions from their operational peculiarities, that substantially influence the practical application of fuses and circuit breakers.IntroductionUnder the slogan "Safety First" are...... Source : Advanced Audio Technology
Description Of Protective Switches Operation Two articles in two last year's numbers of the magazine Er have presented a survey of operation of overcurrent protective devices, based on the use of traditional safety fuses. A similar survey can be presented also for the protective devices, manufactured as various protective switches. These devices are in the first place:* circuit breakers complying with the standard SIST EN 60898 - circuit...... Similar Editorial : Operation G by Dina Giolitto. | Source : Future Wireless Technology
