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Vacuum degree online monitoring instrument for vacuum arc-extinguishing chamber

A vacuum interrupter and monitoring device technology, which is applied to high-voltage air circuit breakers, high-voltage/high-current switches, electrical components, etc., can solve the problem of low vacuum accuracy, poor reliability, and failure to meet the requirements of high vacuum in vacuum interrupters. Precision online monitoring and other issues to achieve the effect of ensuring accuracy, increasing reliability and ensuring safe operation

Inactive Publication Date: 2015-03-11
DALIAN UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical applications, the potential of the shielding cover will be affected by grid voltage fluctuations and environmental temperature changes, resulting in low accuracy and poor reliability of the monitored vacuum degree. Requirements for high-precision on-line monitoring of vacuum degree

Method used

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  • Vacuum degree online monitoring instrument for vacuum arc-extinguishing chamber
  • Vacuum degree online monitoring instrument for vacuum arc-extinguishing chamber

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Experimental program
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Embodiment Construction

[0009] like figure 1 , figure 2 Shown: as in the prior art, there is a coupling capacitance sensor placed in the shielding box 1, and the difference from the prior art is that a temperature sensor is also provided in the shielding box 1; The phase module A and the differential amplifying module are connected to the single-chip microcomputer, the output of the single-chip microcomputer is fed back to the differential amplifying module through the automatic zero-adjustment module, and the output of the single-chip microcomputer is connected to the display and the wireless communication module; a voltage sensor is provided, and the voltage sensor sequentially passes the signal The conditioning module B and the phase-shifting module B are connected with the differential amplifier module; the temperature sensor is connected with the single-chip microcomputer.

[0010] The signal conditioning circuit A can also be fixed in the shielding box 1, and other components can be installed...

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Abstract

The invention discloses a vacuum degree online monitoring instrument for a vacuum arc-extinguishing chamber. The vacuum degree online monitoring instrument for the vacuum arc-extinguishing chamber is based on a coupling capacitance method, has temperature and voltage compensation and is high in accuracy. The vacuum degree online monitoring instrument for the vacuum arc-extinguishing chamber is provided with a coupling capacitance sensor arranged inside a shielding box (1), a temperature sensor is further arranged inside the shielding box (1), the coupling capacitance sensor is connected with a single chip microcomputer sequentially through a signal conditioning module A, a phase shift module A and a differential amplification module, an automatic zero setting module feeds back the output of the single chip microcomputer to the differential amplification module, and the output of the differential amplification module is connected with a display; the vacuum degree online monitoring instrument for the vacuum arc-extinguishing chamber is provided with a voltage sensor, and the voltage sensor is connected with the differential amplification module sequentially through a signal conditioning module B and a phase shift module B, the temperature sensor is connected with the single chip microcomputer.

Description

technical field [0001] The invention relates to an on-line measuring device for vacuum degree, in particular to an on-line monitoring device for vacuum degree of a vacuum interrupter with temperature and voltage compensation and high accuracy based on a coupling capacitance method. Background technique [0002] The vacuum switch uses high vacuum as the arc extinguishing and insulating medium. Its basic structure is a vacuum arc extinguishing chamber. There are moving contacts, static contacts and shielding covers in the vacuum arc extinguishing chamber. The outer casing of the moving contact has a bellows. There is an insulating solid seal outside the arc extinguishing chamber, an incoming wire end connected to the static contact, and an outgoing wire end connected to the moving contact. When in use, the vacuum switch is connected in series with the equipment wire through the input terminal and the outlet terminal. When the equipment fails, the control signal will control th...

Claims

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Application Information

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IPC IPC(8): H01H33/668
CPCH01H33/668
Inventor 廖敏夫王会珍葛国伟段雄英邹积岩
Owner DALIAN UNIV OF TECH
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