Combined switch appliance air chamber

Abstract

The invention relates to a combined switch appliance air chamber, wherein the appliance air chamber has a simple structure and good performances and is applied to electrical power systems. The appliance air chamber comprises a shell of the air chamber, a breaker and an isolating switch, wherein the beaker and the isolating switch are installed in the shell, the isolating switch is arranged below the breaker, a sleeve pipe for connecting outside cables with the air chamber is embedded in the shell, and the breaker is a permanent magnetic mechanism breaker. Compared with appliance air chambers in prior art, the appliance air chamber has the advantages that time for the permanent magnetic mechanism breaker to break current is obviously shorter than that for a spring operation mechanism breaker.

Description

technical field [0001] The invention relates to a switch electrical gas chamber, in particular to an electrical gas chamber in which a circuit breaker and a disconnector are combined in a power system. Background technique [0002] The circuit breaker in the power system has been more and more widely developed as a power supply method for breaking current. Considering the high stability and reliability of the use of electrical equipment, it is required that the power supply equipment in the power system need to provide an obvious disconnection point. The circuit breaker The power supply mode of combined electrical appliances combined with isolating switches is more and more supported by the market, but there are many deficiencies in such combined electrical appliances in the market, mainly reflected in the following aspects: [0003] 1. The circuit breaker basically adopts a spring operating mechanism. First, the operating mechanism is more complicated, the number of parts ...

AI Technical Summary

Problems solved by technology

[0003]1. The circuit breaker basically adopts a spring operating mechanism. First, the operating mechanism is relatively complex, with a large number of parts, and the stability and reliability of the mechanism are poor. According to the statistics of circuit breaker failure, 50% of the circuit breaker failures are caused by the failure of the circuit breaker mechanism, and once the mechanism fails, only specialized technicians can solve it. Second, the arc extinguishing time is relatively long. When the short-circuit current occurs, its arc extinguishing performance brings a great test

[0004]2. The isolating switch used by the combined electrical appliance is bulky, and most of the isolating switches do not have the function of grounding;

[0005]3. The fracture of the isolating switch used by the combined electrical appliance is invisible, and it is impossible to observe whether the isolating dynamic and static contacts are in place during the operation of the equipment, which affects the safe and stable operation of the equipment and Equipment maintenance has a big impact

[0006]4. Most combined electrical appliances are insulated by air, the gas is large, and the IP protection level is not high. There are also inflatable combined electrical appliances that use SF6 gas insulation, but the air chamber No internal temperature measuring device is designed, the internal temperature of the gas chamber cannot be detected during the operation of the equipment, and online monitoring cannot be realized

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