Sulfur hexafluoride (SF6) is a colorless, odorless, non-toxic gas, its molecular structure is stable, not easy to react with other substances and has excellent insulation performance and stable chemical properties, as well as non-toxic, non-corrosive and other characteristics, so it is widely used in power equipment.

First, let's take a look at sulfur hexafluoride gas:

1. Molecular structure: The molecular structure of sulfur hexafluoride gas is SF6, in which S and F atoms are connected together in the form of covalent bonds, forming a hexagonal structure.

2. Density: the density of sulfur hexafluoride gas is about 1.5 times that of air density, and its density is about 0.0006g/L under standard atmospheric pressure.

3. Liquefaction: sulfur hexafluoride gas can be liquefied at low temperature, and its volume after liquefaction is about 1/1000 of that in gaseous state. Therefore, in power equipment, sulfur hexafluoride gas is usually stored and transported as a liquid.

In fact, the working principle of sulfur hexafluoride (SF6) gas on the circuit breaker mainly depends on its excellent insulation performance and arc extinguision performance, as well as its stable chemical properties and safety.

The following summary about the working principle of sulfur hexafluoride gas on the circuit breaker:

1. Insulation performance: The insulation performance of sulfur hexafluoride gas is very good, its electrical strength is about 3 times that of air, so it can be used as an insulating medium in the power system. In circuit breakers, sulfur hexafluoride gas is used to isolate electrical components and circuits, preventing current leakage and short circuits between electrical components.

2. Arc extinguision performance: sulfur hexafluoride gas has good arc extinguision performance at high temperature, can quickly absorb the energy generated by the arc, so that the arc quickly extinguished. Therefore, in the circuit breaker, sulfur hexafluoride gas can be used to generate and extinguishing the arc.

3. Stability: sulfur hexafluoride gas is gaseous at room temperature and pressure, and its chemical properties are stable and not easy to react with other substances. Therefore, in the circuit breaker, sulfur hexafluoride gas can work stably for a long time without negatively affecting the performance of the circuit breaker.

4. Safety: sulfur hexafluoride gas is non-toxic and harmless to human body, so there is no need to worry about the safety of sulfur hexafluoride gas when using circuit breakers.