Overhead line electricity testing device

Abstract

The invention relates to an overhead line electricity testing device, comprising a shell and an electricity testing module, wherein the shell comprises an induction lantern ring and a mounting seat, the induction lantern ring is arranged at one end of the mounting seat, the induction lantern ring is provided with an accommodating through hole for accommodating an overhead line, a first accommodating space is opened in the induction lantern ring, and a second accommodating space is opened in the mounting seat; and the electricity testing module comprises a coil, a common mode inductor, a voltage stabilizing unit, a rectifying unit and a lamp panel, the coil is arranged in the first accommodating space, the common mode inductor, the voltage stabilizing unit and the rectifying unit are arranged in the second accommodating space, and the lamp panel is arranged at one end of the mounting seat away from the induction lantern ring. The overhead line electricity testing device senses overheadline current into a secondary circuit, can accurately judge whether current flows through the overhead line, requires no external power supply, avoids an insulation fault of the overhead line and thesecondary circuit, and can avoid causing personal injury and equipment damage. Furthermore, the shell is used for protecting the electricity testing module, so that the service life of the overhead line electricity testing device is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of electric equipment, in particular to an electrical inspection device for overhead lines. Background technique [0002] Usually, in order to improve the reliability of power supply and reduce the number of households during power outages, in principle, all those who can switch to power supply must be switched to power supply when the distribution network is undergoing maintenance work. For overhead lines, many feeders use pole-mounted switches as tie switches. After the maintenance work is completed and the original power supply mode is restored, it is generally necessary to switch on the connecting column to unlink the feeders. When operating on site, first turn off the switch, and then open the knife gates on both sides of the switch. However, after the switch is disconnected, it is impossible to judge whether the switch can be opened through the electric test (under this working condition, both ends o...

AI Technical Summary

Problems solved by technology

However, after the switch is disconnected, it is impossible to judge whether the switch can be opened through the electric test (under this working condition, both ends of the switch are charged), and the status indication pointer of the switch on the column can only be used to judge whether the switch has been opened, and then pull the switch. Operation of the knife gate

However, the opening and closing state indication of the switch on the column depends on the internal mechanical transmission. Aging, corrosion, looseness, or unclear indications caused by various reasons may lead to misjudgment of the switch state, for example, there is a fault inside the switch , after the opening operation, the indication is in the opening state, but the switch does not actually act, or the contacts are not sufficiently separated after the action, and the switch is still in the conduction state in essence

At this time, the operation of the knife switch will cause an accident of pulling the knife switch with load, causing an arc, and there is a considerable hidden danger to personal and equipment safety.

The knife switch cannot be operated with load current. The existing electroscope is a voltage-type electroscope, which can only test whether there is voltage on the overhead line, but cannot sense whether there is current, and cannot meet the electrical inspection requirements of the above occasions.

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