DC electroscope

Abstract

The invention discloses a direct-current electroscope comprising a metal electrode, a housing, and an indication circuit. The metal electrode connected with a to-be-detected device is used for transmitting a testing signal of the to-be-detected device, wherein the to-be-detected device includes built-in and externally attached components of the direct-current electroscope. A circuit board is arranged in the housing; the metal electrode is connected with the circuit board through the housing; and the circuit board is configured to detect whether a fault occurs at the to-be-detected device basedon the testing signal transmitted by the metal electrode and output an indication signal based on the detection result. The indication circuit connected with the circuit board is used for outputtingthe indication signal. Therefore, a problem that the existing direct-current electroscope has a large potential safety hazard because of the incomprehensive self-checking function in the prior art issolved; and thus whether the built-in and externally attached components of the direct-current electroscope have faults can be detected, so that the usage safety and stability of the direct-current electroscope are improved substantially.

Description

technical field [0001] The invention relates to the field of electronic component detection, in particular to a DC electroscope. Background technique [0002] Most of the DC electroscopes are used in the subway industry. Since the subway industry is an emerging industry developed in China in recent years, there is no relevant national or industry standard at present. The existing related products are designed and produced with reference to the industry standards of AC electroscopes ( DL740-2014 "Capacitance Electroscope"), according to the requirements of Article 5.2.7.1 of the power industry standard DL740-2014 "Capacitance Electroscope", self-inspection components, whether built-in or external, should be able to detect and indicate All circuits of the device (including power supply and indication functions). [0003] At present, the self-test function of the DC electroscope in the industry only detects whether all the circuits and components in the head of the electroscop...

AI Technical Summary

Problems solved by technology

[0003] At present, the self-test function of the DC electroscope in the industry only detects whether all the circuits and components in the head of the electroscope are good or bad, and cannot detect whether the components, circuits and external grounding leads in the resistance rod are good or bad. , which poses a great risk to safety

[0004] The self-inspection function of the existing technology can only detect the circuit and components inside the DC electroscope head. The disadvantage: the self-inspection function cannot detect the two parts of the resistance rod and the grounding lead. If there is a problem with these two parts, it will affect the safety of the operators.

Specifically, using a problematic DC electroscope for electrical inspection operations cannot effectively detect whether the equipment is charged

If the equipment is powered but the DC electroscope does not detect that the equipment is electrified, an electric shock accident will occur if the operator performs maintenance operations. The electroscope in the prior art has a great potential safety hazard in practical applications.

[0005] Aiming at the problems in the prior art that the self-inspection function of the DC electroscope cannot detect the connection and disconnection of the resistance rod and the grounding lead, the detection is not comprehensive, and there are great potential safety hazards, no solution has been proposed in the prior art

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