Leakage Current Characteristics of Insulators Polluted by Volcanic Ashes
نویسندگان
چکیده
منابع مشابه
Monitoring of Leakage Current for Composite Insulators and Electrical Devices
Electrical insulation is an important part of all electrical systems. The level of insulation safety provided by an insulator depends on the amount of leakage current flowing on its surface. Actually increased leakage current causes a part of high voltage to appear at dead end of insulator. This voltage may sometimes be of order of 1000 to 5000 Volts depending upon weather conditions. Such a le...
متن کاملLeakage Current and Discharge Phenomenon of Outdoor Insulators
Abstract: This paper descirbes leakage current characters and discharge phenomenon of outdoor insulators both in the lab and in the field. The results are hoped to be used for online monitoring of the contamination levels. The following contents are introduced in the paper: leakage current monitoring systems, relationships between leakage current and discharge phenomenon, flashover prediction m...
متن کاملEarly warning thresholds for partially saturated slopes in volcanic ashes
0266-352X/$ see front matter 2012 Elsevier Ltd. A http://dx.doi.org/10.1016/j.compgeo.2012.11.002 ⇑ Corresponding author. Tel.: +41 21 693 23 14; fax E-mail addresses: [email protected] (J. [email protected] (A. Ferrari), [email protected] (L. Laloui). Rainfall-induced landslides in steep soil slopes of volcanic origin are a major threat to human lives and infrastructure. In the context of ...
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This manuscript presents the experimental results of a new-clean and seven geothermal naturally polluted outdoor porcelain insulators. These insulators were tested in a hermetically sealed chamber, where their leakage currents and applied voltages were measured with a storage digital oscilloscope. The measured data could be recorded oscilloscope and transferred to a computer, saved in softcopy ...
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The surface conductivity of insulators in the field is usually very non-uniformly distributed. In this case the integral surface conductivity is not an appropriate parameter of pollution severity. A better evaluation can be achieved on the basis of local conductivity measurements by means of special probes, e.g. the rod probe or tissue strip probe. In this paper the form factors of different pr...
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ژورنال
عنوان ژورنال: IEEJ Transactions on Power and Energy
سال: 1995
ISSN: 0385-4213,1348-8147
DOI: 10.1541/ieejpes1990.115.8_956