Title :
Insulation characteristics of indoor use 3.3 kV-33 kV epoxy resin insulators subjected to contamination and moisture
Author :
Miyamoto, Masayuki ; Takano, T. ; Matsuura, K.
Author_Institution :
Fuji Electr. Corp. Res. & Dev. Ltd., Chiba, Japan
Abstract :
An artificial contamination test was undertaken of the indoor 3.3 kV-33 kV epoxy post insulators to study the deterioration and flashover voltage (FOV). The following conclusions were reached: (1) the components of indoor contaminants are mainly ion chloride and ion sulfate. Deposits of these contaminants on insulators of indoor use panels over 2-3 years is less than 0.01 mg/cm/sup 2/; (2) indoor insulators are subject to moisture absorptionand dew condensation due to changes in temperature and humidity; (3) when the insulators are contaminated, FOV decreases considerably when an AC voltage is applied but is uneffected by electrode configuration; (4) FOV can be expressed as a function of surface leakage length (L) and equipment salt deposit density (ESDD), which are related to insulator design and panel contamination measurement, respectively.<>
Keywords :
environmental testing; insulators; 2 to 3 y; 3.3 to 33 kV; AC voltage; artificial contamination test; components of indoor contaminants; contamination; deterioration; dew condensation; epoxy post insulators; epoxy resin insulators; equipment salt deposit density; flashover voltage; indoor insulator; insulation characteristics; insulator design; moisture; moisture absorption; panel contamination measurement; surface leakage length; Contamination; Electrodes; Epoxy resins; Flashover; Humidity; Insulation; Insulator testing; Moisture; Temperature; Voltage;
Conference_Titel :
Electrical Insulation, 1988., Conference Record of the 1988 IEEE International Symposium on
Conference_Location :
Cambridge, MA, USA
DOI :
10.1109/ELINSL.1988.13868
