2016-01-09

Density refers to the mass ρ=m/V(kg/m^3) per unit volume of a specific substance under certain conditions, for SF6 electrical equipment in a chamber gas is sealed in a fixed and unchanged container, if there is no leakage, the gas mass in the chamber will not change, the gas density will not change, such as If the gas chamber is lowered, it indicates that the gas chamber is leaking. Since the size of the density is independent of the change in temperature, a density meter can be used to monitor

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2016-01-09

Pressure gauge is a monitoring function, that is, the detection of system pressure, density relay is on the one hand is to monitor the change of system pressure, on the other hand is to control and protect the function, density relay can be set in different pressure states of the open and close signal contact. There are usually alarm contacts and latching contacts, and the pressure gauge is without contacts, which is the difference between the two. Density relays, pressure relays with temperatur

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2016-01-08

After the SF6 Density micro-water online monitoring system (Winfoss-S6) micro-water monitoring unit is officially connected to the gas chamber, because the SF6 gas in the gas chamber needs to gradually reach a dynamic balance with the gas in the cavity of the newly connected equipment, the micro-water value displayed by the monitoring unit will appear a change curve of first rising and then decreasing, and slowly decrease to the micro-water value of SF6 gas in the gas chamber. Under normal circu

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2016-01-05

1, ppm is a specific gravity unit, used for gas composition measurement. It is divided into ppmv and ppmw, respectively corresponding to the volume ratio and mass ratio, and all belong to absolute units. Volume ratio refers to the volume number of a certain pure gas contained in the unit reference gas, ppmv is one part per million, that is, 1uL/L. For example, after 1 liter of air is injected with 1 ml of pure SF6 gas to make it uniform, we call the SF6 concentration in this container 1000 ppmv.

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2016-01-03

The host of the SF6 integrated online monitoring system produced by Winfoss is designed for the entire SF6 switch station, with SF6 concentration online monitoring and compatible with SF6 gas density online monitoring and SF6 gas micro-water online monitoring access.

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2016-01-01

SF6 gas is a molecular gas with many atoms. The decomposition and ionization of SF6 gas at high arc temperature is very complicated. The arc center part of SF6 gas has low thermal conductivity, high temperature and high conductivity. The outer flame part has high thermal conductivity, low temperature and small conductivity, so the arc current is almost concentrated in the arc center part. As a result, a very thin, bright arc can be seen in SF6 gas, and the external flame site is almost invisible

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