If you own a manufacturing plant, a factory assembly line, or any other automated space that can benefit from having its certain components operate at different speeds and frequencies, variable frequency drives (VFDs), also known as AC drives, can be ...
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Maintenance of GIS: Experience has shown that the internal parts of Gas Insulated Substation are so well protected inside the metal enclosure that they do not age and as a result of proper material selection and lubricants, there is negligible ...
Installation: The GIS is usually installed on a monolithic concrete pad or the floor of a building. It is most often rigidly attached by bolting and/or welding the GIS support frames to embedded steel plates or beams. Chemical drill anchors ...
Electrical and Physical Arrangement: For any electrical one-line diagram there are usually several possible physical arrangements. The shape of the site for the GIS and the nature of connecting lines and/or cables should be considered. Figure 1 compares a “natural” ...
Gas Monitor System: The insulating and interrupting capability of the SF6 gas depends on the density of the SF6 gas is at a minimum level established by design tests. The pressure of the SF6 gas varies with temperature, so a ...
Surge Arrester: Zinc oxide surge arrester elements suitable for immersion in SF6 are supported by an insulating cylinder inside a GIS enclosure section to make a surge arrester for overvoltage. Because the GIS conductors are inside in a grounded metal ...
Bus: To connect GIS modules that are not directly connected to each other, and SF6 bus consisting of an inner conductor and outer enclosure is used. Support insulators, sliding electrical contacts, and flanged enclosure joints are usually the same as ...
Circuit Breaker: GIS uses essentially the same dead tank SF6 puffer circuit breakers used in AIS. Instead of SF6 -to-air as connections into the substation as a whole, the nozzles on the circuit breaker enclosure are directly connected to the ...
