布萊迪 SF6氣體密度表SF6氣體密度控制器簡介

SF6 氣體密度表和YM / YWM / YXM SF6 氣體密度控制器簡介
SF6 gas densimeter & SF6 gas density controller

SF6 氣體應用

當高壓斷路器（又稱高壓開關）在開斷電路時會有火花產生又稱之為電弧，在電氣設備中電弧的產生會對斷路器造成燒毀甚至發生爆炸的危害。SF6 氣體由于具有絕緣性能好滅弧能力強的特性，目前在高壓斷路器中被廣泛使用。
SF6 氣體在電力設備中的滅弧性能取決于設備容器中的SF6 氣體的密度。如在不同型號、規格的斷路器中的SF6氣體的密度就是不相同的，如果SF6氣體由于泄漏，密度減小，則滅弧作用就會減弱或起不到滅弧作用，因此，用SF6 密度表對容器內SF6 氣體的密度進行監視和控制就顯得格外重要。

SF6 gas intended

The spark happened when the electric switchingor the high pressure breaker （high pressure switch）open or close circuit is the electric arc. The electric arc produced in the electrical equipment may lead the circuit breaker to burn down even explosive. The SF6 gas is widely used in the high-pressured electric appliance because it has the insulating ability of extinguishing arc.
The ability of The SF6 gas extinguishing arc has big relations with the SF6 gas density in the equipment vessel. In the different model, specification circuit breaker SF6 gas density is different, when the density SF6 gas is lower than some value, the extinguishing arc function is weaken, therefore, it is important that carrying on the surveillance and the control of the SF6 gas density .
　

SF6 密度表原理與應用

公司生產制造的SF6 密度表，有“YM（M1）”T-P 曲線監測“; YWM （M2）”溫度補償監測;“YXM （M3）”溫度補償加控制裝置三大系列產品。

“YM （M1）”T-P曲線監測系列密度表的原理與應用

T-P 曲線監測SF6 氣體的密度，是將一定額定工作壓力下的SF6 溫度- 壓力對照情況用一條曲線在表盤上表示出來，讓人們從表盤上方便和直觀地來監測SF6 氣體的密度情況，帶這種曲線盤的壓力表，稱之為T-P 曲線的密度表。

一般情況下，表盤上是由3 條T-P 曲線組成，從左至右我們依次叫他們為“左曲線”、“中曲線”、“右曲線”，其中“左曲線”和“右曲線”將表盤分為3 個區域，“左曲線”的左邊為紅色區域、“左曲線”和“右曲線”之間為綠色區域、“右曲線”的右邊為黃色區域（如圖

在用“表盤上帶T-P曲線”的密度表對容器內SF6氣體密度進行監視時，應首先測試環境溫度，然后找出環境溫度半圓線與指針的相交點A，若相交點A在綠色區域內，則表明器內SF6氣體密度在規定的范圍內；若相交點在紅色區域內，則表明器內SF6氣體密度低于規定的范圍，應當補氣或檢查容器是否有泄漏發生。
SF6 densimeter principle & intended
The SF6 densimeter made of BRIGHT has three big series products :"YM （M1）" T-P curve monitor; "YM （M2）" temperature compensation monitor, "YXM （M3）" temperature compensation with control device.

"YM （M1）" the T-P curve monitor seriesdensimeter principle and service intended

Under the fixed working pressure, a curve on the
dial plate shows the SF6 temperature- pressure comparison situation to let the people conveniently and direct-viewing monitors the SF6 gas density situation from the dial plate.

　　In the ordinary circumstances, the dial plate is composed by 3 T-P curves, they are "the left curve",
"center the curve", "the right curve" from left to right,"the left curve" and "the right curve" divides the dial plate into 3 regions, "left curve" left side for red region, "left curve" and "right curve" between for green region,"right curve" right side for yellow region （as chart）.

　　When using the densimeter " with T-P curve on the dial plate" , you should read the thermometer nearby the densimeter to find out the ambient temperature, then find the point of intersection A of the ambient temperature half-circle line and the pointer, if A is in green region, then the SF6 gas density is in
stipulation scope; If A is in red region, then the SF6 gas density is lower than the stipulation scope, it is necessary to restore vital energy or inspect the vessel whether has divulges occurs.

“YWM （M2）”溫度補償監測密度表的原理與應用

“帶溫度補償裝置”密度表是在原壓力儀表結構上，加裝溫度補償裝置所組成。是一種不用考慮環境溫度的變化（即不用查看溫度計），也不用查看“對照表”，而是直接從密度表的讀數就可以判斷出容器內的SF6 氣體的密度是否在規定的范圍內。

工作原理是：當環境溫度上升時，雖然容器內SF6氣體的密度未發生變化但其壓力增大，帶動指針順時方向轉動，而當溫度上升時，雙金屬補償裝置的“U形”口張大，則推動指針向逆時針方向轉動，當兩種運動引起表針的偏轉量相抵銷時，無論環境溫度如何變化，指針都不會發生偏轉。反之，當環境溫度下降時，雖然容器內SF6 氣體的密度未發生變化但其壓力減小，帶動指針向逆時方向轉動，而當溫度下降時，雙金屬補償裝置的“U 形”口縮小，則推動指針向順時針方向轉動，當兩種可運動個起表針的偏轉量相抵銷時，無論環境溫度如何變化，指針都不會發生偏轉。所以只要容器內SF6 氣體不發生泄漏，其密度不變化。儀表的示值就不變。從而達到測量和監視其密度的作用。其使用方法是：在20℃的環境溫度下，將容器內的SF6氣體充至額定工作壓力（P額），在每日的規定監測時間進行監測時，只要密度表的指針指向額定工作壓力即為正常狀態。

"YWM （M2）" temperature compensation monitor series densimeter principle and service intended
The densimeter "with temperature compensation "installs the temperature compensation in the initial pressure measuring structure. It does not need to consider ambient temperature change （ not need to see the thermometer）, also does not need to look over "the comparative table", but is directly judge the SF6 gas density whether in stipulation scope.
　　The principle of work is: When ambient temperature rises, the pressure of the SF6 gas increases, drives the indicator along the clockwise rotation, but at the same time, the mouth of the bimetal compensation system "the U shape" publicizes, then impels the indicator to the counter clockwise rotation, when two kind of strength be equilibrium, the ambient temperature change cannot made the indicator deflection. Otherwise, When ambient temperature falls, the pressure of the SF6 gas decreases, drives the indicator counter the clockwise rotation, but at the same time, the mouth of the bimetal compensation system "the U shape" reduces, then impels the indicator to along the clockwise rotation, when two kind of strength be equilibrium, the ambient temperature change cannot made the indicator deflection. So the SF6 gas does not occur divulges, its density does not change. Although pressure in the vessel changes along with the ambient temperature change, under the function of the bimetal piece "temperature compensation installment", the densimeter indicator cannot have deflection. Thus the SF6 density value in the vessel is really reflected. Its application method is: ambient temperature under 20 ℃, fill the SF6 gas to the fixed working pressure （P ）, Monitor at regulate time daily, it is normal while the indicator pointing the fixed working pressure.
YXM（M3）溫度補償加控制裝置的密度控制器

當“YXM （M3）”型SF6 氣體密度控制器接入密閉系統后，向系統設備中充入SF6 氣體，當SF6 氣體密度達到規定值時，密度控制器的指針指向額定工作壓力。當工作環境溫度發生變化時，雖然SF6 氣體的密度并沒有發生變化，但SF6 氣體的壓力將隨著溫度的變化而改變，密度控制器上的指針本應隨壓力的改變而發生偏轉，此時通過控制器內部的溫度補償裝置對SF6氣體壓力的變化進行補償，使指針不發生偏轉。只有在系統中SF6氣體發生泄漏，造成密度下降時，SF6氣體密度控制器的指針才發生偏轉，從而起到對系統設備中SF6 氣體密度的監測作用。
SF6氣體密度控制器，通常配置兩個設定開關點Ps1和Ps2，設定點Ps1為報警點，設定點Ps2為閉鎖點。一旦系統發生SF6 氣體泄漏時，隨著SF6 氣體密度降低，指針上的觸頭（動觸頭）與設定開關點Ps1 上的觸頭（定觸頭）接觸時則發出報警信號；隨著密度繼續下降，當指針觸頭與設定點Ps2上的觸頭接觸時，則發出閉鎖信號，自動關閉斷路器開關，使之不能工作，防止事故的發生。

YXM （M3） temperature compensation withcontrol device density controller

"YXM （M3）" SF6 density controller has installed electric contact device based on the "M2"densimeter. The two contact points is warning point and closedown point. So SF6 density controller can not only monitor but also warn and close automatically. When SF6 gas divulges, internal pressure reduces along with the density of SF6 gas reducing, causes the indicator contact （move touch） with the lower limit point （fixed touch） to send out the alarm, continues along with the density of SF6 gas reducing, the pressure continues to drop, when on the indicator contact （move touch） with the closedown point （fixed touch） to shut-off circuit breaker switch automatically, to prevented the accident occurred.
　

SF6 氣體密度表YM / YWM / YXM
高壓開關氣體密度表
SF6氣體密度控制器
YM（M1）”T-P 曲線監測
YWM （M2）”溫度補償監測
YXM （M3）”溫度補償加控制裝置