SVIBOR - Project code: 2-05-250

MINISTRY OF SCIENCE AND TECHNOLOGY

Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69
E-mail: ured@znanost.hr

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Project code: 2-05-250


PHENOMENA IN HIGH VOLTAGE SWITCHING APPARATUSES AND SWITCHGEARS


Main researcher: MILIŠA, ANTE (31572)



Assistants
Type of research: developmental
Duration from: 01/01/91. to 12/31/93.

Papers on project (total): 0
Institution name: Končar, Institut za elektrotehniku, Zagreb (8)
Department/Institute: Switchgear and Controlgear Department
Address: Baštijanova bb
City: 10000 - Zagreb, Croatia
Communication

Summary: The project comprises theoretical and experimental investigations of dielectric characteristics of modern arc-extinguishing and insulating media for H.V. switching devices (vacuum and SF6). Further, it treats electric and thermodynamic arc parameters at current breaking and in the case of internal electric arc, as well as overvoltages appearing at switching capacitive and small inductive currents by means of vacuum circuit-breakers. Besides, the reliability and service life, ecological aspects, monitoring and economics of new switching types will be analyzed. A synthesis of investigation results will provide the basis for the development of new designs of switchgear and switching devices from 7.2 to 145 kV.

Keywords: current interuption, dielectric characteristics, electric arc, SF6 circuit-breakers, switchgear (GIS), vacuum circuit-breakers

Research goals: Elaboration of research and development documentation for design of high-voltage switchgear from 0.2 to 145 kV (transmission, distribution and industrial) in which new kinds of current interruption are used with a view to increase their functionality, reliability efficiency and ecological advantages. Scientific contributions are expected in the following fields of investigation: - efficiency of triple-joint shielding (conductive electrode - gas dielectric - solid dielectric), - arc voltage at faults in gas mixtures of SF6 and N2 depending on arc length, arc current and material the electrodes are made of, and - overvoltages that appears at switching on and off capacitive and small inductive currents (with disconnectors, circuit-breakers and earthing switches).

Other information about the project.
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Last update: 02/22/94
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