2016-01-15

When the arc is burned in SF6 gas, almost all SF6 gas in the arc space is resolved to F and S in single atomic states under the action of high arc temperature. At the moment of arc current crossing zero, because F and S have strong electronegativity, a large number of adsorption and capture of free electrons, forming negative ions, so that F- in the current snack sharply increased, the mass of these negative ions are very large, thousands of times that of electrons. When the polarity is opposite

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2016-01-14

59% of leaks occur around the device, at pipe connections and flange connections. 16% around the access gasket; Instrument interface; 12% in the rubber insulation sleeve; 5% around the drive rod; 5% at the weld; 3% was caused by cavity trachoma.

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2016-01-13

A: SF6 quantitative leak detector (Winfoss-C1) adopts the principle of high frequency ionization measurement: When the air contains different concentrations of sulfur hexafluoride gas or various halogen gases, the degree of ionization under the action of high frequency electromagnetic field is different.

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2016-01-13

SF6 laser imaging testing instrument is mainly composed of laser emission system, laser cooling system, low light level electric receiving system, signal conversion amplification and processing system, display unit and power supply. The advantage of SF6 laser imaging detector is that it can detect leaks when SF6 electrical equipment is running, and it can detect very small leaks quickly and far away. However, the device is expensive, large and bulky, and is not easy to operate outdoors.

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2016-01-12

SF6 gas mass is heavier than air, in the case of not fully mixed with air, SF6 gas has a tendency to deposit in low places, such as cable trench, indoor bottom, the bottom of the container, etc. In these places where there may be a large amount of SF6 gas deposits, it is easy to be hypoxic, and there is a danger of suffocation. Therefore, most countries stipulate that the maximum allowable concentration of SF6 gas in the workplace for operation and maintenance is 1000UL/L.

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2016-01-09

In order to prevent the lack of oxygen caused by the retention of SF6 gas in the equipment room due to leakage, or the existence of trace harmful substances to endanger the health of personnel, SF6 and oxygen content should be tested regularly. The oxygen content of the air should be greater than 18%.

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