Gas insulated substation gis simply put, in the gis system, all the live components are enclosed in a grounded metal enclosure, then the whole system housed in a chamber full of gas. Unified sf6 gas pressure throughout the switchgear. The principle of buildingblock construction modular construction reduces the installation time to a few weeks. The invention provides a method for detecting partial discharge of a gas insulated switchgear gis. Gas insulated switchgear from siemens will support you with a largely maintenancefree, stable, and tested design for maximum availability even under extreme environmental conditions. A major difference between conventional air insulated substations ais and the gas insulated substations gis is that the sf6 gas insulated electrical components are placed within an earthed, pressurized metallic container. The following are the principle gas insulated modules for a substation. A switchgear may be a simple openair isolator switch or it may be insulated by some other substance.
Gasinsulated highvoltage switchgear gis is a compact metal encapsulated switchgear consisting of highvoltage components such as circuitbreakers and disconnectors, which can be safely operated in confined spaces. As one of the leading earthing switch, gis switch, high voltage switch, circuit breaker and distribution transformer manufacturers in china, we warmly welcome you to wholesale customized components of switch gears from our factory. A perfect condition of the insulation is essential for ensuring a reliable operation of gis. As vacuum technology is not available for high voltage, so for gis or gas insulated switchgear system above 72. Gas insulated substations gis primarily use sulphur hexafluoride gas as the primary insulator. They meet international safety requirements and are internal arc. Sulphur hexaflouride sf6 gas the primary insulating medium. Operating process for access to gas insulated switchgear transgrid. Sf6 gas insulated switchgeargis has vacuum circuit breaker and disconnector without maintenance, which greatly reduces maintenance and inspection workload. In a gis substation, the various equipment like circuit breakers, bus bars, isolators, load break switches, current transformers, voltage transformers, earthing switches, etc. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures.
Reference for abb gis 420 kv substation in denmark gas. Comprehensive reference covering all aspects of gas insulated substations including basic principles, technology. Gasinsulated switchgear gis technology facilitates efficient and reliable transmission for rapid urbanization and industrialization. Betas electrical engineering team works with our civil engineering and project management departments to design and build high voltage projects across the country. The course location is abbs training center in zurich, switzerland. New concept of switchgear for replacing sf6 gas or gas. The various modules are factory assembled and are filled with sf6 gas. Local control cabinet lcc in gas insulated substationgis. Gas insulated substation gis also called sf6 gas insulated metalclad. These instructions for assembly are an integral part of the product and must be stored so that they are at any time readily accessible for and can be used by persons who are to work on the switchgear. In addition, they can also result in damage to the environment as sf6 is a green house gas. Gasinsulated switchgear saves space compared with air insulated. Operation and maintenance customer training gasinsulated. To help ensure safe operation sequences of switchgear, trapped key.
Making gis equipment safe for work using remote operation. A gas insulated substation gis is a high voltage substation in which the major structures are contained in a sealed environment with sulfur hexafluoride gas as the insulating medium. Cn101655536a method for detecting partial discharge of. Since the first operation of the phase segregated type gis in 1970, fuji has. It is used by utility providers and hidden facilities alike for two reasons. The method for detecting the partial discharge of the gis is more effective in the monitoring of the partial. Major components you can spot while looking at hvehv gis. This problem can be solved by using gas insulated switchgear technology. Gas insulated substation gis also called sf6 gas insulated metalclad switchgear is preferred for 12kv, 36kv, 72. In the past double pressure type of sf6 breakers were used. Course description chs223 gas insulated switchgear basic. In gas insulated medium voltage switchgear, vacuum technology is used as interrupting purpose and sf 6 gas is used as insulation material. Gis highvoltage gas insulated switchgear substations. Ais systems need busbar connections and boots on the switchgear.
Gasinsulated mediumvoltage switchgear from siemens is very safe. Three phase encapsulated type sf6 gas insulated switchgear type sdf for 170 kv 06b1e0001 gate city ohsaki, east tower, 112, osaki 1chome, shinagawaku, tokyo 1410032, japan. Pioneer and technology leader driving gis innovations. Operation and maintenance of a gas insulated substation.
Abb is the pioneer in gis technology with over 45 years of proven technology for complex. Sf6 gas leakages can be expensive, can cause equipment tripping. If the switchgear is sold to new owners, they must receive this document along with the. Best air insulated switchgearais manufacturer in china. Sf6 gas superior dielectric properties used at moderate pressure for phase to phase and phase to ground insulation preferred for voltage ratings of 72. The portfolio includes gis solutions from 60 to 800 kv, along with hybrid, mobile and digital gis solutions, gasinsulated lines and other secondary products to maximize switchgear and network operation, including springoperated mechanisms for ais, gis and generator circuit breakers. Gas insulated switchgear gishgis up to 252kv compact. In an electric power system, switchgear is composed of electrical disconnect switches, fuses or. China earthing switch, gis switch, high voltage switch. Hence the overall size of each equipment and the complete substation is reduced. We specialize in epc services for gas insulated substations gis, switchyards, substations, facts and high voltage transmission lines. Gasinsulated highvoltage switchgear gis is a compact metal.
Several crucial terms are for better understanding of the presented material. Retrofit circuit breaker operating mechanism type elk03hmb for gis type. Abbs 420 kilovolt kv gasinsulated switchgear gis supports the integration of wind power into the danish grid. They may metal enclosed indoor type switchgear, metal enclosed outdoor type switchgear, outdoor type switchgear without metal enclosure, etc. Thereafter, they are taken to site for final assembly. The most familiar types of switchgear are circuit breakers and. Gasinsulated switchgear transmission products siemens. The low insulation distances are guaranteed by the high dielectric strength of the sulfur hexafluoride sf 6 gas. Sf6 gas detection is important in circuit breakers, gas insulated switchgear and other equipment.
We can gladly provide you with information about our extensive portfolio of gasinsulated switchgear. This article discusses an overview of what is a switchgear, features, its working, components used, functions and different types. This is a significant change in operating the switchgear with circuit breakers, disconnectors, and switches earth. They include most of the substation equipment such as minimum oil circuit breakers, bulk oil circuit breakers, air magnetic, sf6 gasinsulated, vacuum, and gasinsulated switchgear. As the dielectric strength of sf6 gas is higher than air, the clearances required are smaller. Our gasinsulated switchgear for rated voltages from 72. Our training concept combines classroom training and practical lessons in the best possible way. Xdge is one of the most reliable gas insulated switchgear suppliers with. Switching power supply switchgear refers to electrical tool that regulates the flow of electricity within an electrical system. From 3 kv to 36 kv switchgear system is categorized as medium voltage switchgear or mv switchgear. Other common types are oil or vacuum insulated switchgear. Compared with the gas insulated switchgear, airinsulated switchgear has more obvious advantages.
A gasinsulated substation gis uses a superior dielectric gas, sf6, at moderate pressure for phasetophase and phasetoground insulation. The course conveys knowledge on the abb gas insulated switchgear product portfolio, its function, operation and maintenance philosophy learning objectives the participant understands the function and design of a gas insulated switchgear can describe the function of the components and their working principle. An effective although more costly form of switchgear is the gasinsulated switchgear gis, where the conductors and contacts are insulated by pressurized sulfur hexafluoride gas sf 6. The method is a comprehensive detecting method combining ultrahigh frequency detection and acoustic emission detection to monitor and position the partial discharge in the gis.
This course is based on terms used in ieee and iec regulations. I have remarkable understanding of all the engineering concepts, and have been working more than 16 years in different aspects of the engineering process to include. Although for both interruption and insulation, sf 6 gas is used in many medium voltage gis system. The filling gas in the gas insulated switchgear is sf6 and n2 normally, so the maintenance cost is much higher than ais. In conclusion, lsis offers customers the most efficient and economical solutions. Gis systems are significantly easier to care for on a regular basis as they offer. In iec he is secretary of sc 17c high voltage switchgear assemblies. The following switching sequence is an example that applies the principles for isolation and earthing when. Gis high voltage substation engineering uses the gas sulfur hexafluoride for. Introduction to gas insulated substations switchgears gis. The interruption medium of this switchgear may be insulating oil, sf 6 gas or vacuum. This kind of equipment includes substation devices like minimum oil cbs, bulk oil cbs, sf6 gasinsulated, air magnetic, gasinsulated, vacuum, etc. Gasinsulated switchgear electrical engineering portal.
Hereby at working conditions the small gas volumes are added to a large one. Gasinsulated switchgear saves space compared with airinsulated. Our gasinsulated switchgear shows the following properties in addition to the above mentioned ones. Rated operating sequence of circuit breaker standard. Type ltb 245e1 circuit breaker abb technical detail ltb245e1 245kv standard iec62271100 rated voltage 245 kv rated frequency 50 hz rated normal current 4000a maximum breaking current 50ka break. Gasinsulated switchgear gis is a piece of high voltage equipment that is being. Highvoltage gis gas insulated switchgear features since the first operation of the phase segregated type gis in 1970, fuji has successfully developed as a standard series of phase segregated type or three phase encapsulated type gis which realized a quite compact and very reliable construction. The higher cost of sf6 insulated switchgear is justified by saving to the reduction in floorarea requirement. Lsis who has been a leader in electricity and automation. Even at this moment, a new principle to improve interruption ability. More space is required for outdoor substation when compared to indoor gas insulated substation gis outdoor switch yards are more vulnerable to faults as it is located in outside atmosphere which has some influence from pollution, saline environment and other environmental factors.
This page is all about gas insulated systems gis including isolated phase gis. The construction and working principles of sf6 circuit breaker varies from manufacturer to manufacturer. This sf6 gas insulated switchgear working principle is the biggest advantage in the working stability and development of miniaturization and it also without any maintenance for 30 years time. Sf 6 gas pressure for insulating purpose is generally kept below 2. Design concept and advantages gas insulated switchgear ls sf6 gas insulated switchgear 5. Gasinsulated switchgear gis is very compact and therefore represents a spacesaving alternative to classic airinsulated installations. Gas insulated switchgear gas circuit breaker latest. Apply to electrician, engineer, technician and more. Since 1950 years, in order to minimize the substation area, sf6 gas insulated switchgear has been energetically developed.