High-voltage electroscope for power equipment maintenance

Abstract

The invention relates to the technical field of circuit detection, and discloses a high-voltage electroscope for power equipment maintenance. The high-voltage electroscope comprises a grip, a ferrule,a contact electrode, a self-checking switch and an insulating sleeve, wherein the ferrule is mounted on the top end of the grip, the contact electrode is mounted on the top end of the ferrule, the self-checking switch is mounted on the ferrule, the insulating sleeve is mounted on the grip, the ferrule is provided with a positioning base, the interior of the positioning base is rotatably connectedwith a positioning rod, and the positioning rod is provided with a first electrode. Through the cooperation between the first electrode and a lead wire, the high-voltage electroscope can maximize thecontact between the contact electrode and a measured object when testing a circuit or equipment, so that a current on the equipment or the circuit is transmitted to the electroscope, thus the area ofthe contact electrode is increased, the current of each portion can be transmitted to the electroscope by means of the first electrode and the contact electrode, and the probability of extending intoa split conductor is reduced, thereby increasing the sensitivity of the electroscope in tests.

Description

Technical field [0001] The present invention relates to the technical field of circuit detection, in particular to a high-voltage electroscope for power equipment maintenance. Background technique [0002] High-voltage electroscope, sound and light instructions made of electronic integrated circuits, stable and reliable performance, with full circuit self-checking function and strong anti-interference characteristics, GD series high-voltage electroscope is suitable for 220V-500V, 6KV, 10KV, 35KV , 110KV, 220KV, 500KV AC transmission and distribution lines and equipment, whether it is day or night, indoor substation stations or outdoor overhead lines, can be accurately and reliably tested, is the electrical department of power systems and industrial and mining enterprises The necessary safety equipment. [0003] With the development of my country's power system, there are more and more high-voltage power grids. As a necessary safety tool for high-voltage maintenance, the demand for...

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Problems solved by technology

[0003] With the development of my country's power system, there are more and more high-voltage power grids. As a necessary safety tool for high-voltage maintenance, the demand for high-voltage electroscopes is also increasing. The working principle of the existing high-voltage electroscopes is as follows Figure 5 As shown, the staff holds a high-voltage electroscope and uses the contacts of the electroscope to contact the electrical equipment to be tested. If there is voltage in the electrical equipment, a physical reaction will occur at the other end of the high-voltage electroscope by the sound or light of the diode. To judge whether the equipment is charged, during the detection process of the high-voltage electroscope, due to the large area of ​​the equipment conductor or the high humidity around the conductor, the electric field distribution on the surface of the conductor and its surroundings is similar to that of a uniformly charged plane, which is a uniform electric field , when the electroscope is selected in the middle of a conductor with a large area (such as an equipment wiring connection plate), the electroscope is in a uniform electric field, its axial potential gradient is small, and the current flowing through the capacitance to ground is small, resulting in The working circuit cannot be started, and the electroscope will not emit sound and light indications, so that the staff cannot know whether the equipment or circuit is powered. In the prior art, in order to increase the sensitivity of the electroscope, the length of the electrode will be increased, and the contact electrode is too long , the operation during the touch process is relatively difficult, and the contact electrode is easy to extend into the split wire, which does not achieve the effect of increasing the contact electrode, further reduces the sensitivity of the high-voltage electroscope, affects the normal test of the circuit, and increases the circuit in the test. Hidden dangers

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