There
is a gas alleged sulphur hexafluoride, or SF6, for short.TBC help you
confidently purchase buy mosaic
from factories in China. A lot of housewives are absolutely abreast about SF6
and buy it with the groceries. Or not really.
Okay, no housewives, then. But, accept to the tale. It so happens that if you yield a calm ambit breaker (or cruise switch) of the blazon you acquisition in a calm switchboard, its purpose is to accessible to arrest accepted if there is an overload.
When the afflict occurs, the acquaintance of the ambit breaker opens and there is a baby arc. The arc goes out afterwards a while, back it cools down. This all happens actual quickly.China HOWO concrete mixer Truck and China Concrete Mixer Truck. In an 11 000 V ambit breaker, the contacts that accessible beneath an afflict will aswell accept an arc. However, if that arc was in air, it would not go out,otech Super Dry supplies desiccant dry cabinet. attributable to what is alleged the ‘plasma effect’. So, as a result, the contacts of an 11 000 V ambit breaker are absorbed in a catchbasin in careful oil, which cools the arc down in an afflict condition.
The downside of this is that you accept to change the oil every two years or so – added generally if the ambit breaker is acclimated regularly. These alleged oil ambit breakers, or OCBs, accept a actual continued life.Choose from our large selection of Cable Ties. If they are looked afterwards properly, they will endure 60-plus years. And alteration the oil is no big deal.
But access date left, SF6, the phenomenon gas. An abstract from Wikipedia: “SF6 is acclimated in the electrical industry as a aerial dielectric average for high-voltage ambit breakers, switchgear . . . generally replacing oil-filled ambit breakers that can accommodate adverse PCBs.”
Wikipedia goes on: “SF6 gas, beneath pressure, is acclimated as an insulator in gas-insulated switch- accessory (GIS) because it has a abundant college dielec- tric backbone than air or dry nitrogen. This prop- erty makes it accessible to decidedly abate the admeasurement of electrical gear. This makes GIS added acceptable for assertive purposes, such as calm placement, as against to air-insulated electrical gear,Want to find HOWO cargo truck? which takes up appreciably added room. Gas-insulated electrical accessory is aswell added aggressive to the furnishings of abuse and climate, as able-bodied as getting added reliable in abiding operation because of its controlled operating ambiance . . .”
Oh, wow, ain’t it wonderful? It is for all these admirable affidavit that SF6 actual abundantly displaced oil in 11 000 V ambit breakers and, in GIS switchgear, it continues to do so. There are even YouTube videos of humans accepting fun with SF6 which, back it is six times added than air, makes your articulation go actual abysmal if you breathe it in. There is a accessory downside – if it is apparent to abiding or acute electrical arcs, SF6 gas decomposes to anatomy sulphur fluoride gases and baneful metal fluorides.
If damp is present, the atomization by-products can cover hydrofluoric and sulphuric acids. Wait a minute . . . hydrofluoric and sulphuric acids? You use the aboriginal to compose bottle and the additional to deliquesce rust. Right. Useful stuff.
But there is aswell a above downside. You may wish to actuate of this gas or the gas may acquisition its way into the atmosphere for some reason. Should we worry? Waaaal . . . according to the Intergovernmental Panel on Altitude Change, SF6 is the a lot of almighty greenhouse gas that it has evaluated, with a all-around abating abeyant 22 800 times that of carbon dioxide (CO2) over a 100-year period.
Average all-around SF6 concentrations added by about 7% anniversary year during the 1980s and 1990s. But, comfortingly (again from Wikipedia) “given the low amounts of SF6 released, compared with CO2, its all-embracing addition to all-around abating is estimated to be beneath than 0.2%”.
So that would beggarly it is still in use, right? Is it 0.2 % a year or what? And getting abiding (unlike CO2), it is not traveling to go away. So, in 50 years, 10% of all-around abating will be by an abiding gas? But there is a banking acute by switchgear manu- factures to accumulate on with the stuff. Well, if you accept in all-around warming, it makes no sense. Fortunately, I don’t . . . but application the getting absolutely makes no sense.
Okay, no housewives, then. But, accept to the tale. It so happens that if you yield a calm ambit breaker (or cruise switch) of the blazon you acquisition in a calm switchboard, its purpose is to accessible to arrest accepted if there is an overload.
When the afflict occurs, the acquaintance of the ambit breaker opens and there is a baby arc. The arc goes out afterwards a while, back it cools down. This all happens actual quickly.China HOWO concrete mixer Truck and China Concrete Mixer Truck. In an 11 000 V ambit breaker, the contacts that accessible beneath an afflict will aswell accept an arc. However, if that arc was in air, it would not go out,otech Super Dry supplies desiccant dry cabinet. attributable to what is alleged the ‘plasma effect’. So, as a result, the contacts of an 11 000 V ambit breaker are absorbed in a catchbasin in careful oil, which cools the arc down in an afflict condition.
The downside of this is that you accept to change the oil every two years or so – added generally if the ambit breaker is acclimated regularly. These alleged oil ambit breakers, or OCBs, accept a actual continued life.Choose from our large selection of Cable Ties. If they are looked afterwards properly, they will endure 60-plus years. And alteration the oil is no big deal.
But access date left, SF6, the phenomenon gas. An abstract from Wikipedia: “SF6 is acclimated in the electrical industry as a aerial dielectric average for high-voltage ambit breakers, switchgear . . . generally replacing oil-filled ambit breakers that can accommodate adverse PCBs.”
Wikipedia goes on: “SF6 gas, beneath pressure, is acclimated as an insulator in gas-insulated switch- accessory (GIS) because it has a abundant college dielec- tric backbone than air or dry nitrogen. This prop- erty makes it accessible to decidedly abate the admeasurement of electrical gear. This makes GIS added acceptable for assertive purposes, such as calm placement, as against to air-insulated electrical gear,Want to find HOWO cargo truck? which takes up appreciably added room. Gas-insulated electrical accessory is aswell added aggressive to the furnishings of abuse and climate, as able-bodied as getting added reliable in abiding operation because of its controlled operating ambiance . . .”
Oh, wow, ain’t it wonderful? It is for all these admirable affidavit that SF6 actual abundantly displaced oil in 11 000 V ambit breakers and, in GIS switchgear, it continues to do so. There are even YouTube videos of humans accepting fun with SF6 which, back it is six times added than air, makes your articulation go actual abysmal if you breathe it in. There is a accessory downside – if it is apparent to abiding or acute electrical arcs, SF6 gas decomposes to anatomy sulphur fluoride gases and baneful metal fluorides.
If damp is present, the atomization by-products can cover hydrofluoric and sulphuric acids. Wait a minute . . . hydrofluoric and sulphuric acids? You use the aboriginal to compose bottle and the additional to deliquesce rust. Right. Useful stuff.
But there is aswell a above downside. You may wish to actuate of this gas or the gas may acquisition its way into the atmosphere for some reason. Should we worry? Waaaal . . . according to the Intergovernmental Panel on Altitude Change, SF6 is the a lot of almighty greenhouse gas that it has evaluated, with a all-around abating abeyant 22 800 times that of carbon dioxide (CO2) over a 100-year period.
Average all-around SF6 concentrations added by about 7% anniversary year during the 1980s and 1990s. But, comfortingly (again from Wikipedia) “given the low amounts of SF6 released, compared with CO2, its all-embracing addition to all-around abating is estimated to be beneath than 0.2%”.
So that would beggarly it is still in use, right? Is it 0.2 % a year or what? And getting abiding (unlike CO2), it is not traveling to go away. So, in 50 years, 10% of all-around abating will be by an abiding gas? But there is a banking acute by switchgear manu- factures to accumulate on with the stuff. Well, if you accept in all-around warming, it makes no sense. Fortunately, I don’t . . . but application the getting absolutely makes no sense.
没有评论:
发表评论