Supporting insulator type high voltage induction sensor

Abstract

The invention discloses a supporting insulator type high voltage induction sensor. The supporting insulator type high voltage induction sensor is fixed in high-voltage electrical equipment, and comprises an insulator, an upper flange is arranged at the upper end of the insulator, a lower flange is arranged at the lower end of the insulator, a printed circuit board is arranged in the insulator, a shielding cover is arranged on the face, opposite to the lower flange, of the printed circuit board, and the printed circuit board and the shielding cover are fixed with the lower flange through a connecting piece. The other face of the printed circuit board is opposite to a high-voltage electrified body, and a signal line for outputting voltage signals is further arranged on the other face of the printed circuit board. Due to the fact that the printed circuit board is adopted to replace two pieces of existing copper foil to induct electric field signals, industrial production of the sensor can be achieved, and the production efficiency of the sensor is greatly improved. Meanwhile, due to the fact that the high-voltage electrified body can be fixed to the upper flange in the insulator, the high-voltage electrified body can be fixed conveniently, the distance between the high-voltage electrified body and the printed circuit board is fixed, the electric field signals in the high-voltage electrified body can be detected accurately and reliably, and wrong instructions and misoperations can be avoided.

Description

Technical field [0001] The present invention relates to a high-voltage sensor in high-voltage electrical equipment, in particular to a supporting insulator-type induction high-voltage sensor in high-voltage electrical equipment. Background technique [0002] High-voltage live work is dangerous, so a display device that can indicate whether high-voltage equipment is live is needed. Commonly used high-voltage live display devices usually include a sensor and a controller. At present, the sensors of domestic high-voltage live display devices are usually divided into two types: contact type and non-contact type. The contact sensor uses the capacitor to divide the high voltage to extract the signal, thereby judging whether the measured object is charged. This kind of sensor is prone to capacitor breakdown and cause accidents. [0003] The current non-contact sensors (ie inductive sensors) use the principle of inducing high-voltage electric field signals. The sensor is installed under o...

AI Technical Summary

Problems solved by technology

When the positions of the two copper foils are slightly deviated and cannot be kept parallel, the capacitance formed by the two copper foils cannot accurately sense whether the high-voltage electrified body in the high-voltage equipment is charged, which often leads to false indications

At the same time, since the processing of copper foil requires special cutting and other operations, standardized industrial production cannot be carried out at present, which greatly affects the industrialization and promotion of sensors.

The use of existing inductive sensors also has the following disadvantages: 1. Since the sensor is in the process of inducing voltage signals, the distance between the sensor and the high-voltage electrified body (such as the high-voltage busbar) must be accurate and fixed, and the sensing surface of the sensor is also required to be in contact with the high-voltage electrified body. The surface of the body is strictly parallel and centered. In order to meet the above installation conditions, it is often necessary to add additional sensor fixtures, thus increasing the production cost

2. The high-voltage charged body generally needs to be fixed by special fixing devices (such as post insulators), which increases the production cost of the switchgear; 3. Due to the small space in the switchgear, the additional sensor fixing parts will occupy the space in the switchgear. Not only is the installation inconvenient, time-consuming and labor-intensive, but some cabinet types have no suitable space to install this inductive sensor; 4. When the high-voltage live body is a three-phase busbar, since the high-voltage live body needs to face the sensor and The center distance between charged bodies should be equal, which increases the difficulty of design and installation of three-phase busbars

But there is no non-contact post insulator with sensors

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