Sf 6 sulphur hexafluoride gas has excellent dielectric, arc quenching, chemical and other physical properties which have proved its superiority over other arc quenching mediums such as oil or air. Sulphur hexafluoride is a greenhouse gas, and wilful venting to the atmosphere is illegal refer to section 9. Test method d2284 may be particularly helpful since many sulfur hexafluoride decomposition products are acidic. Oct 17, 2018 sulfur hexafluoride sf6 is a gas whose molecules consist of one sulfur atom and six fluorine atoms. If necessary, add after the link to keep me from modifying it. Sf 6 gas has excellent insulating property and it has a high electronegativity. Identifying, quantifying and controlling emissions of. Advantages over other media include lower operating noise and no.
Circuit breakers are essential for circuits operating at higher voltages and equipment that carry large currents. The relaying equipment is aided in this task by circuit breakers. Sulfur hexafluoride gas detector sf6 detector milram. Sulfur hexafluoride price for circuit breaker, wholesale.
Source from anqiu hengan gas manufacture factory on. An advantage of sf 6 is that it allows the transmission of higher power levels in a smaller footprint compared with other insulating mediums. Sulfur hexafluoride an overview sciencedirect topics. Sulfur hexafluoride sf6 is a gas whose molecules consist of one sulfur atom and six fluorine atoms. This circuit breaker range meets iec standard 62271100. Return all empty cylinders and appropriate logs to the central facility. Highvoltage circuit breakers have greatly changed since they were first introduced in the mid1950s, and several interrupting principles have been developed that have contributed successively to a. Hence, this gas also began to be used in circuit breaker as arc quenching medium.
Sf6 is a very good dielectric material which can resist high potentials. Worlds first sf 6 gas insulated substation was established in paris in the year of 1966. Series 3120590 299 guaranteed specifications g2485247 2r 39 lb 17. Series 3530590 3 air hexafluoride circuit breakers protect electrical power stations and distribution systems by interrupting electric currents, when tripped by a protective relay. Sulfur hexafluoride electric arc insulator electricity. Test method d2284 should not be used to evaluate the total amount of. Sulfur hexafluoride fds p 208 7142010 united kingdom report version 1. In the year of 1937, general electrical company first realized that sf 6 gas could be used as gaseous insulating material. Sulfur hexafluoride 100 2551624 ingredient name % cas number there are no additional ingredients present which, within the current knowledge of the supplier and in the. Primarily used as an insulating medium for a wide range of high voltage electrical and electronic equipment such as circuit breakers, switch gears and particles accelerators. Because of the properties of sf6 gas such as excellent arc quenching, high electronegative nature, and excellent. At earths atmospheric pressures, sulfur hexafluoride gas converts directly from a solid state to a gaseous one.
Sulfur hexafluoride gas sf6 properties heavy, chemically inert, non toxic no poisonous effect on the human body but decomposition products are poisonous color less and odor less it is gaseous at normal room temperature and pressure density is about 6. Sulphur hexafluoride sf6 circuit breaker a circuit breaker in which sf 6 under pressure gas is used to extinguish the arc is called sf 6 circuit breaker. Typical for a nonpolar gas, it is poorly soluble in water but quite soluble in nonpolar. Instead of oil, air, or a vacuum, a sulfur hexafluoride circuit breaker uses sulfur hexafluoride gas to cool and quench the arc on opening a c. Sulfur hexafluoride sf6 gas properties electrical study. Astm d2472 15 standard specification for sulfur hexafluoride. Gasco sulfur hexafluoride calibration gas 100 ppm balance air in a 600 liter aluminum disposable cylinder cga 590 connection. Semiconductor processing dielectric power equipment magnesium casting aluminum casting tracer gas laboratories. Sulfur hexafluoride gas detector industrial applications. Exelon continues to phase out the 1st generation breakers wherever possible. It therefore warrants methodical and careful handling.
None disclaimer provided with this information by the compiling agencies this information is formulated for use by elements of the department of defense. This can lead to premature failure of the breaker, possibly with catastrophic results. Breakdown voltage of compressed sulfur hexafluoride sf 6 at very low frequency low frequency 30 khz by jian han a thesis presented in partial fulfillment of the requirements for the degree master of science approved october 2010 by the graduate supervisory committee. Sf6 gas servicing equipment enervac international ulc.
Sf1 circuit breakers fixed version from 12 kv to 36 kv sf2 circuit breakers fixed version from 24 kv to 40. Sf 6 circuit breakers are made from 72550kv with interruption current of 20 to 63 ka and rated current of 1,200 to 12000 amps because of the properties of sf 6 gas such as excellent arc quenching, high electronegative nature, and excellent dielectric strength sf 6 circuit breakers are popular for high voltage applications and above. Sulfur hexafluoride is a colorless, odorless, nontoxic, inorganic, nonflammable gas. Request pdf investigation on critical breakdown electric field of hot sulfur hexafluoridecarbon tetrafluoride mixtures for high voltage circuit breaker applications sulfur hexafluoride sf6. However, the test methods referred to in this standard may be useful in the evaluation of inservice or used gas. Personal precautions refer to protective measures listed in sections 7 and 8. Due to high electronegativity, it has a high affinity for absorbing free electrons. Sulfur hexafluoride sf6 recycling program for out of. Alternatively, you can add nobotsdenyinternetarchivebot to keep me off the page altogether. Sf6 gas is used as an insulating medium in high kva breakers. Jan 02, 2014 sf6 circuit breakers are made from 72550kv with interruption current of 20 to 63 ka and rated current of 1,200 to 12000 amps. I have just added archive links to 2 external links on sulfur hexafluoride circuit breaker.
Gasco sulfur hexafluoride calibration gas 100 ppm balance nitrogen in a 103 liter steel disposable cylinder. Jan 02, 2019 a circuit breaker in which sulphur hexafluoride gas or sf 6 gas is used as the arc quinching medium, known as an sf6 circuit breaker. Handling of sulfur hexafluoride gas central facilities. It is colorless, odorless, nontoxic, and nonflammable, and is soluble in water and some. Exelon has initiated several sf6 program enhancements through our iso 14001 environmental management system and voluntary commitments. Both compact and dependable, it is ideally suited to the most demanding applications. The decomposition products, gas and fine powder may be toxic, strong irritants and attack the respiratory system. Nearly 80% of the sf6 produced worldwide is used by the electric power industry.
Highvoltage circuit breakers have greatly changed since they were first introduced in the mid1950s, and several interrupting principles have been developed that have contributed successively to a large reduction of the operating energy. Pole assembly the circuitbreaker is made up of three separate poles. Reach out to suppliers directly and ask for the lowest price, discount, and small shipping fees. Sulfur hexafluoride revision date 01182018 p000000208 version. Sulfur hexafluoride circuit breaker operating in a very. This document provides the technical procedures for the analysis of sulfur hexafluoride sf. Jan 02, 2019 sf6 or sulfur hexafluoride gas molecules are combined by one sulfur and six fluorine atoms. Sf6 circuit breaker advantages disadvantages applications. Removal of sulfur hexafluoride gas from inservice equipment. This specification is intended to apply only to gas as purchased. Sulfur hexafluoride sf 6 is a relatively nontoxic gas used in a number of applications for its inert qualities. A hybrid circuit breaker which can be used in an electrical highvoltage network. Sf6 gas is used as the arc quenching medium sulfur hexafluoride sf6 is an electronegative gas and has a strong tendency to absorb free electrons.
Prior to removal of gas, check the gas compartment and associated devices for. Sf6 emissions reduction partnership exelon has participated in the sf6 emissions reduction partnership with u. Medium voltage outdoor circuitbreaker type ohb uses sulphur hexafluoride gas as insulating and arc quenching medium. Advantages over other media include lower operating noise and no emission. Sf6 gas or sulfur hexafluoride gas properties electrical4u. Sulphur hexafluoride medium voltage circuit breakers launched into market from 1971. The circuit breaker identification shows how to determine circuit breaker ratings from the mo del nu mber. The dielectric and other physical and chemical properties related to its lack of reactivity have led to the extensive use of sf 6 as an insulating medium in switching equipment e. Sf6 looks like a liquefied compressed gas when its vapor pressure is 21. The fg2 circuit breaker employs the latest sf6 technology, co mb ining superior performance with low ma intenance. Sample date sample cylinder serial number is this a baseline sample. Identifying, quantifying and controlling emissions of sulfur.
Aug 17, 2017 a circuit breaker in which the current carrying contacts operate in sulfur hexafluoride or sf6 gas is known as sf6 circuit breaker. A high tension circuit breaker comprising a sealed enclosure having a fixed assembly and a moving assembly disposed therein, said fixed assembly and said moving assembly each including a respective main contact and a respective arcing contact forming an arcing zone, and said enclosure being filled with gas under pressure constituted, at at least in. This hybrid circuit breaker has two seriesconnected arcing chambers, a first of which is filled with sulfahexafluoride gas as a quenching and insulating medium, and a second of which is in the form of a vacuum interrupter chamber. Sulfur hexafluoride sf6 molar mass, molecular weight. Sulphur hexafluoride sf 6 is an excellent dielectric gas for high voltage applications. Sf 6 has an octahedral geometry, consisting of six fluorine atoms attached to a central sulfur atom. Comed and peco have approximately 200,000 lbs of sf6 in service within twopressure breakers, puffer breakers, circuit switchers, and gas insulating. Gasco sulfur hexafluoride calibration gas ppm balance air in a 600 liter aluminum disposable cylinder cga 590.
Online monitoring technology for moisture content of. Its combined chemical, thermal and electrical properties allow many advantages to be achieved. All sf 6 gas shall be obtained through a central facility. Sulfur hexafluoride circuit breakers protect electrical power stations and distribution systems by interrupting electric currents, when tripped by a protective relay. Yes no sf6 gas pressure of sample psig psig psig psig sf6 gas temperature of sample of of of of new. A circuit breaker is a device that interrupts the abnormal or fault currents and in addition performs the function of a switch. Looking for affordable sulfur hexafluoride price for circuit breaker. It is colorless, odorless, nontoxic, and nonflammable, and is. Handling and use of sulfur hexafluoride gas page 4 of 8 v. Sf6 gas servicing equipment sulfur hexafluoride sf6 is an excellent gaseous dielectric for high voltage power applications. Breakdown voltage of compressed sulfur hexafluoride sf6. Ta ble 1 below shows the ratings of av ailable type fg2 circuit breakers.
It is chemically inert, gaseous even at low temperature, non flammable, non toxic, non corrosive. Precautions handling arced sf6 a chemical breakdown of sulfur hexafluoride sf6 occurs when it is exposed to a very high temperature or electrical arc as in the circuit breaker. Instead of oil, air, or a vacuum, a sulfur hexafluoride circuit breaker uses sulfur hexafluoride gas to cool and quench the arc on opening a circuit. Sf6 is an inert gas, but decomposed components as a result of electrical arcing or naked flames are toxic and hazardous. Sulfur hexafluoride gas sf6 properties instrumentation tools. It has been used extensively in high voltage circuit breakers and other switchgear employed by the power industry. Pole assembly the circuit breaker is made up of three separate poles. Energy procedia 17 2012 1447 a 1451 18766102 2012 published by elsevier ltd.
Why do the sf 6 gases have an excellent heat transfer property. A circuit breaker in which the current carrying contacts operate in sulfur hexafluoride or sf6 gas is known as sf6 circuit breaker. The high voltage conductors, circuit breaker interrupters, switches, current transformers, and voltage transformers are in sf6 gas inside grounded metal enclosures. Medium voltage outdoor circuit breaker type ohb uses sulphur hexafluoride gas as insulating and arc quenching medium. Nearly 80% of the sf6 produced worldwide is used by. Sulfur hexafluoride is an inert perfluorine, routinely detectable in sea water at. Detection range 0 2000 ppm other ranges available resolution 1 ppm. Handling and use of sulfur hexafluoride gas page 6 of 8 b record date, location, and equipment nomenclature on cylinder log. At room temperature and pressure sf 6 is a gas, but it forms a dense.
Byproducts of sulfur hexafluoride sf6 use in the electric. Sulfur hexafluoride sf 6 is an inorganic, colorless, odorless, nonflammable, nontoxic but extremely potent greenhouse gas, and an excellent electrical insulator. Sulfur hexaflouride is an inert, nontoxic, colorless, odorless, tasteless, and nonflammable gas consisting of a sulfur atom surrounded by and tightly bonded to six flourine atoms. A circuit breaker in which sulphur hexafluoride gas or sf 6 gas is used as the arc quinching medium, known as an sf6 circuit breaker. The designated central facility is responsible for maintaining a log. Instead of oil, air, or a vacuum, a sulfur hexafluoride circuit breaker uses sulfur hexafluoride sf 6 gas to cool and quench the arc on opening a circuit. If moisture is able to infiltrate over time, arcing can occur. Hv circuit breaker type generator circuit breaker fkga8 generator circuit breaker i sc 210 ka u r 33 kv sf 6 circuit breaker designed for power plants from 700 to 1,500 mw it is equipped with a springoperated mechanism per pole. Sulfur hexafluoride is used in a range of industries for a range of applications including. Online monitoring technology for moisture content of sulfur.
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