Outdoor high-voltage isolating switch sensing finger pressure tester

Abstract

The invention provides a sensing finger pressure tester of an outdoor high voltage isolator. A flexible diaphragm pressure sensor, a moving contact simulating adjustor and a measuring display form an integral device. The moving contact simulating adjustor comprises a handle, a tubular handle body, an on position indicating slider, a moving contact width adjusting screw nut, a sliding block, a sliding chute, a limit baffle, etc. The invention has the advantages of small volume, light weight, reasonable structure, and reliable test data. The invention can be used as the sensing finger pressure tester of the high voltage isolator arranged newly or inspected and pretested. The invention mainly aims at the high voltage isolators with different voltage classes and rated current specifications, such as GW4, GW5, GW7, GW31, GW25, GW27, GW33, GW43, GW26, etc., is in particular suitable for using during the on-site work high above the ground.

Description

technical field [0001] The invention relates to a test and detection device for electric power engineering, in particular to testing equipment for contact finger pressure of an outdoor AC high-voltage isolating switch in electric power engineering. Background technique [0002] The outdoor high-voltage isolating switch is the primary equipment that is completely exposed to the atmospheric environment and is most directly and seriously affected by the environmental climate conditions. The contact fingers and contacts of the high-voltage isolating switch are movable contacts. If the installation quality or the spring that provides the contact finger pressure is annealed due to corrosion and current heating due to poor contact, the contact resistance will increase and cause heat. In addition, the surface of the contact is attacked by rainwater, dust and harmful gases, and some oxide surface films will be produced. These surface films are almost non-co...

AI Technical Summary

Problems solved by technology

The contact pressure and its distribution of the contacts of the high-voltage isolation switch are important parameters affecting its current-carrying performance, but it cannot be effectively measured at present

In the past, in the detection of contact finger pressure of isolating switches, most manufacturers used ordinary spring scales for measurement, and the power operation department could only rely on the experience of maintenance personnel, such as the number of turns of the shear force isolating switch and the number of turns of the afterburner handle, the plug-in type Estimate the size of the contact pressure by pinching the fingers. Obviously, such a test method is neither scientific nor accurate.

[0005] Retrieved by the Sichuan Science and Technology Information Retrieval Center: 1. There is no domestic literature report on the use of flexible film pressure sensors in the test of high-voltage isolating switches

[0006] 2. There is no literature report in China that uses an ultra-thin single-point flexible sensor and uses a steel slider to transmit pressure in the forward direction in a high-voltage isolating switch contact finger pressure tester, and each pair of contact fingers is independently measured.

Images