The rational application of porcelain insulators made increasing demands , as users of power quality and reliability requirements increase from time to time . Necessary to speed up the analysis of the work of insulators , from time to time to improve and enhance the operating performance of the insulator , competence and gradually increase the level of safe operation of the line .
Rational use of insulators for safe operation of the line to play a decisive role in the insulator is an important component of local transmission lines . Currently used in transmission line insulator dielectric material classification according to porcelain , glass, organic three types of composite insulators , temporary operation, in addition to being struck by lightning affect insulators , filthy , bird damage , snow , humidity, temperature and other environmental factors , but also to accept a strong electric field , lightning surge current , the frequency of the electrical arc current role as well as the mechanical load to bear the long-term work load, consolidated loads, galloping mechanical force.
Ceramic insulator products with butterfly pin insulators insulators for high voltage transmission lines is mainly used suspension insulators for high voltage transmission lines using the ceramic insulator is a special insulated control, can play an important overhead transmission lines effect. The early years of ceramic insulators used for poles, slowly developing in the high -pressure end of the wire connecting the tower to hang a lot of disk-shaped insulator , which is to increase the creepage distance , usually made of ceramic , called ceramic insulators. Ceramic insulators in overhead transmission line plays two fundamental role , namely support wires and prevent current back to the ground , these two roles must be guaranteed , ceramic insulators should not be due to environmental and electrical load conditions change resulted in a variety of electrical and mechanical stress failure , otherwise it will not produce the ceramic insulator significant role , it will damage the whole line and operating life .
1 high-voltage electrical equipment overhaul quality control
High-voltage electrical equipment maintenance personnel shall be subject to professional training , familiar with the internal structure of the device ; using the unit 's professional and technical staff must prepare a realistic overhaul process specification . Disintegration of high-voltage electrical equipment maintenance, atmospheric humidity should be less than 60% of the dry weather be , taking care to prevent dust , impurities and moisture intrusion inside , continue to overhaul the air chamber into the dry hot air , if necessary , to keep the internal dry.
2 . Abnormal sound analysis and judgment
High-voltage electrical equipment inside the discharge voice sound like raindrops falling on the metal shell , as partial discharge acoustic frequency is relatively low, and its sound quality is also different from the noise , and sometimes must be affixed to the shell ear to hear ; If the discharge sound weak , can not distinguish the sound from electrical discharges inside or outside , or are unable to determine whether the discharge sound , through partial discharge measurements , noise analysis method , regular equipment checks.
3 high-voltage electrical appliances in use of personal safety
( 1 ) Indoor SF6 high voltage electrical , attention should be made between the cockpit and air tightness isolation ;
(2) SF6 equipment must be installed indoor ventilation equipment , ventilation before entering the room ;
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