An expandable signal-level lightning arrester measuring circuit system for disconnection, touch-line, cross-short circuit and DC impedance
A DC impedance and measuring circuit technology, applied in the field of electronics, can solve the problems of low detection accuracy and single detection items, and achieve the effects of high measurement accuracy, high detection accuracy and simple structure
Active Publication Date: 2018-04-03
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
The common surge protector SPD has a power level and a signal level, but the current lightning protection component detector can only detect the varistor leakage current, varistor voltage, starting voltage, gas discharge tube voltage and other characteristics of the power level SPD. , the detection accuracy is low, and the detection items are single
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[0012] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0013] Such as figure 1 As shown, the present invention designs a measurement circuit system for expandable signal-level lightning arrester disconnection, line touch, cross-short circuit and DC impedance, including a master MCU, a slave MCU, an input channel switching circuit, an output channel switching circuit, Constant current source circuit, DC impedance test circuit. The master MCU is used to control the switching of each input channel, to complete the tests of miswire, disconnection, short circuit and DC impedance, and to complete the communication with the slave MCU. The slave MCU is used to control the switching of each output channel, complete mis-wire, disconnection, short-circuit, and communicate with the master MCU. The master and slave MCUs use STC12C5A60S2, and the master MCU can control the slave MCU to ...
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Scalable signal-level SPD circuit breakage, line touch, cross-short circuit and DC impedance measurement circuit system, including master MCU, slave MCU, input channel switching circuit, output channel switching circuit, constant current source circuit, DC impedance test circuit ; The main MCU is used to connect and control the switching of each input channel switching circuit; the said slave MCU is used to control the switching of each output channel, complete wrong line, disconnection, short circuit, and communicate with the main MCU; The input channel switching circuit is used to complete the switching of each input channel. When measuring the DC impedance, a constant current is introduced into the measurement input end; the output channel switching circuit is used to complete the switching of each output channel. When measuring the DC impedance When the impedance is measured, the constant current at the measurement output terminal is led back to the constant current source circuit; the constant current source circuit generates a constant current 10mA output for measuring the DC impedance.
Description
technical field [0001] The invention relates to the field of electronics, in particular to an expandable signal-level lightning arrester measuring circuit system for disconnection, line touch, cross-short circuit and DC impedance. Background technique [0002] The disaster phenomenon caused by lightning has become the third largest meteorological disaster after torrential rain, flood and meteorological and geological disasters. Lightning protection is of great significance to national economy, society, military and so on. The common surge protector SPD has a power level and a signal level, but the current lightning protection component detector can only detect the varistor leakage current, varistor voltage, starting voltage, gas discharge tube voltage and other characteristics of the power level SPD. , the detection accuracy is low, and the detection items are single. The signal lightning arrester is a kind of surge protector and an important embodiment of internal protecti...
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IPC IPC(8): G01R31/02G01R27/02
Inventor 王敏周树道汪晋施未来贾赟常昊天马忠良李欣吕庆永熊鲁红
Owner NAT UNIV OF DEFENSE TECH