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 mechanical temperature-compensated pressure switch is used to monitor the equivalent of gas density. GIS is filled with SF to 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 enclosure, the only way for lightning impulse voltages to enter is through the connections of the GIS to the rest…
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 for the GIS modules. Air Connection: SF6-to-air bushings are made by attaching a hollow insulating cylinder to a flange on…
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 adjacent GIS module. Current Transformers: CTs are inductive ring types installed either inside the GIS enclosure or outside the GIS…
GIS is assembled of standard equipment modules (circuit breaker, current transformers, voltage transformers, disconnect and ground switches, interconnecting bus, surge arresters, and connections to the rest of the electric power system) to match the electrical one-line diagram of the substation. A cross-section view of a 242-kV GIS shows above the construction and typical dimensions. Construction of GIS Substation: The modules…
Smart home technology is sweeping across the nation as rapidly as a field fire. Not only that, it is changing the world at the same time. Here are 10 trends in the smart home industry making a huge impact on people’s lives!. 1. Demand For Voice Control 72% of smart home device owners want voice control capability. It’s one of…
A gas-insulated substation (GIS) uses a superior dielectric gas, SF6, at moderate pressure for phase-to-phase and phase-to-ground insulation. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in SF6 gas inside grounded metal enclosures. A photo of Gas Insulated Substations 420kV. The atmospheric air insulation used in a conventional, air-insulated substation (AIS) requires meters of…
We already know the using busbar in the power distribution system has many advantages. It is well arranged, safe, and reliable. I already posted an article about the Why Busbar Trunking System is Preferred Over Cabling? In this post, we will discuss the Busbar VS Cables for Riser Applications. We will discuss some issue and it will explain the position of…
Benefits and comparison of the Busbar Trunking System are numerous. The total cost of ownership (TCO) is very low compared to the conventional cabling system for distribution up to load due to a shorter and easier installation. It required less time & space with low costs. Its overall maintenance is very less. Busbar Benefits and Comparison: Compactness: The Sandwich Construction…
Sometimes our monthly utility bill causes our heart working overtime. It’s a common problem all around the country. One thing is important that your utility company is not cheating on you. It’s you who is not saving electricity. In this post, we are going to provide you 8 smart home devices idea with an approximate cost that can save your…