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Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof

A circuit breaker and spout type technology, which is applied in the field of self-energy SF6 circuit breaker arc extinguishing chamber, can solve the problems that the arc cannot be cooled in time, the recovery strength of the medium cannot be improved, and the arc blowing capacity of the airflow is limited, etc.

Inactive Publication Date: 2013-03-27
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0005] However, the present self-energy SF 6 The breaking power of the circuit breaker only reaches tens of kiloamperes, which is difficult to meet such a requirement. One of the main reasons is that the arc blowing capacity of the arc extinguishing chamber with a single nozzle structure is limited, and the arc cannot be cooled in time and the energy of the diffused arc cannot be cooled. Rapid increase in dielectric recovery strength when breaking higher short-circuit currents

Method used

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  • Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof
  • Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof
  • Self-energy sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and arc extinguishing method thereof

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Embodiment Construction

[0011] The present invention will be described in detail again in conjunction with the examples of the above drawings.

[0012] Double nozzle interrupter ( figure 1 ) includes a moving arc contact (1), a static arc contact (2), an expansion chamber (3), a compressed air chamber (4), double nozzles (5, 6) and an auxiliary nozzle (7). The double nozzles are composed of the left nozzle (5) and the right nozzle (6), which are located on the same axis and symmetrically distributed in the SF 6 The two sides of the gas cylinder-shaped expansion chamber (3) communicate with it. The static arc contact (2) extends into the double nozzles (5, 6) and cooperates with the radial clearance of the dynamic arc contact (1). The shape compressed air chamber (4) is located in the outer layer of the expansion chamber (3) and communicates with it, and the auxiliary nozzle (7) is located in the middle of the throat of the nozzle.

[0013] The arc extinguishing method of the double nozzle arc extin...

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Abstract

The invention provides a sulfur hexafluoride (SF6) circuit breaker double nozzle type arc extinguishing chamber and an arc extinguishing method thereof. The arc extinguishing chamber mainly comprises a movable arc contactor, a static arc contactor, an expansion chamber, an air compression chamber, a double contraction expanded nozzle and an auxiliary nozzle and is characterized in that by means of the structure of the double contraction expanded nozzle, horizontal and longitudinal arc blowing modes are integrated so that arc blowing air current can rapidly disperse electric arc energy, and the recovery strength of arced media is rapidly improved to break high short-circuit current.

Description

technical field [0001] The invention relates to a self-energy SF 6 Circuit breaker interrupter, especially large-capacity self-energy SF 6 The interrupter of the circuit breaker. Background technique [0002] SF 6 The circuit breaker has experienced the development process from double pressure type, single pressure type to self-energy interrupter. Dual pressure circuit breakers have long since been phased out, and the current SF 6 Circuit breakers are mainly of single pressure type and self-energy type. The above three types of arc extinguishing chambers of circuit breakers are all single nozzle structures, adopting the arc extinguishing method of vertical blowing in one direction from upstream to downstream along the axis of the arc extinguishing chamber, whether the arc is extinguished depends on the arc blowing air flow energy in the nozzle Whether to quickly diffuse the arc energy and improve the dielectric recovery strength between the contacts. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/78
Inventor 张俊民兰剑毋卓
Owner BEIHANG UNIV
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