Overhead lines. Calculation of the electrical component of distance between live parts and obstacles. Method of calculation

2002 ◽  
Keyword(s):  
Method Of Calculation ◽  
Overhead Lines ◽  
Electrical Component

scholarly journals EVALUATION OF THE EFFICIENCY OF THE DEVICE FOR LIMITING TENSION OF THE WIRE IN A SHORT CIRCUIT

2017 ◽  
Vol 60 (4) ◽  
pp. 309-319
Author(s):  
I. I. Sergey ◽  
E. G. Panamarenka ◽  
Ya. A. Potachits
Keyword(s):  
Computer Program ◽  
Short Circuit ◽  
Great Length ◽  
Structural Elements ◽  
Method Of Calculation ◽  
Overhead Lines ◽  
Stage Of Development ◽  
Initial Stage ◽  
The Wire ◽  
Short Circuit Currents

The intensity of the electrodynamic action of currents of a short circuit on the flexible conductors of overhead lines depends on the magnitude of currents of short-circuit. The commis sioning of new capacities is inevitably accompanied by an increase in short circuit currents in the nodes of the grid, so the need to limit peaks of tension arising in a short-circuit can acquire a special relevance at a certain stage of development of the power system. At short circuit currents over 40 kA the mechanical force and displacement of the wires can have a decisive influence on the structural performance of flexible bus as of single wires as well as of split phases. In this regard there is a need for the development and use of new structural elements enhancing electrodynamic stability of flexible busbars of outdoor switchgear. One such element is a tension damper. The damper is installed between the portal and the insulator string and limits the transmission of undesirable forces on the portals in a short circuit. The numerical method of calculation of dynamics of flexible wires of switchgear and overhead lines in a short-circuit taking into account influence of a tension damper has been developed. This method was used for modification of the computer program of calculation of electrodynamic stability. With the aid of the computer program it was demonstrated that the installation of the tension damper makes it possible to cut off peaks of the tension of wire in a short circuit at the initial stage of movement of the conductors. However, in spans of a great length after the actuation of the damper the occurrence of new bursts of tension is possible due to the sudden stop of the wire. 

387: The Optimal Timing, Cutoff and Method of Calculation of Preoperative PSA Velocity to Predict Relapse after Prostatectomy: A Report from Search

2007 ◽  
Vol 177 (4S) ◽  
pp. 128-129
Author(s):  
Christopher R. King ◽  
Stephen J. Freedland ◽  
Martha K. Terris ◽  
William J. Aronson ◽  
Christopher J. Kane ◽  
...  
Keyword(s):  
Optimal Timing ◽  
Method Of Calculation ◽  
Psa Velocity

ALTERNATIF PERHITUNGAN RETURN SHAHIBUL MAL PADA SKEMA MUDHARABAH BANK SYARIAH

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Refky Fielnanda
Keyword(s):  
Rapid Development ◽  
Islamic Banking ◽  
Islamic Banks ◽  
Theoretical Level ◽  
Method Of Calculation ◽  
Islamic Bank ◽  
Representative Office ◽  
Operational Practices ◽  
Computerized System ◽  
Practical Level

Abstract: The rapid development of the number of islamic banks should be balanced with the availability of infrastructure to carry out daily operational practices. The operational tools include hardware as like as representative office, computerized system, reliable human resources and software as like as method, culture and financial and islamic banking knowledge. In terms of development of Islamic finance is the paper "Alternative Calculation of Return Shahibul Mal on Mudharabah Scheme on Bank Syariah" was written. During this calculation of return shahibul mal has not been standardized in a formula, thus causing two serious effects. First, in the theoretical level, the formula has not yet created a difficulty. Secondly, in practical level, the formula is not impressive enough to recalculate the complexity of return calculations obtained by shahibul mall, causing laziness of the community using the services of islamic bank. This paper using mathematical and arithmetic equations with the help of modeling made by the author to refine and improve the method of calculation that has been available. The purpose of this paper is to create a standard formula that facilitates the calculation of return earned by a shahibul mal in a mudaraba scheme in a islamic bank.  

Daylight in Underground Spaces

2018 ◽  
pp. 156-161
Author(s):  
Alexei K. Solovyov
Keyword(s):  
Light Guide ◽  
Heat Losses ◽  
Internal Environment ◽  
Method Of Calculation ◽  
Natural Lighting ◽  
Different Depths ◽  
The Common ◽  
Different Diameters

Underground spaces in town centres present a big attraction for investors. However, they put special requirements to the internal environment. Those requirements can be fulfilled by means of daylighting. Examples of lighting of underground spaces are discussed. It is shown that the common systems of natural lighting are not always possible to use and cause big heat losses. Hollow light guide pipes allow avoid the shortcomings of common daylight systems. Method of calculation of daylight factors from hollow light guide pipes is shown. The results of calculation of daylight factors under the light guide pipes of different diameters in the different depths are presented.

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