Telescopic connection device for electrical test

Abstract

A telescopic connection device for an electrical test comprises a telescopic wire box 3, a lead wire 2 and elastic rod plugs 1, wherein the lead wire 2 is placed in the telescopic wire box 3, two ends of the lead wire 2 extend out of the telescopic wire box and are respectively connected with the two elastic rod plugs 1, the length of the lead wire 2 used in the test is controlled through the telescopic wire box 3, the elastic rod plugs 1 have a head-to-tail connection function and can increase the length of the lead wire 2 by being connected in series and increase electric conduction capability of the lead wire 2 by being connected in parallel, and wiring tongs, terminals and connection fishtail clamps in different styles can be replaced through the elastic rod plugs 1. The telescopic connection device has the advantages of improving short circuit wiring efficiency, reducing damage caused by shorting stubs, simplifying preparing work before and after the test, being fast and convenient in wiring, firm, durable and tidy and attractive in wiring and convenient to tidy after use. The length of the telescopic connection device can be adjusted according to the distance between the terminals, the quantity of connection wires is reduced, and the telescopic connection device is provided with an insulation layer for resisting corona and a unified connector and has good practicality due to the fact that the telescopic connection devices can be combined.

Description

technical field [0001] The invention relates to a retractable connection device for electrical test, which is used for electrical test connection. Background technique [0002] When conducting electrical tests, many test items require short-circuiting and short-circuiting grounding of each terminal of the equipment, such as the insulation resistance and absorption ratio test of the transformer, the dielectric loss test of the winding and high-voltage bushing to the shell and the ground, and the power frequency AC withstand voltage test. Test, insulation resistance test of short circuit breaker, etc. [0003] At present, the common ways of short-circuit wiring are as follows: [0004] 1. Fuse or soldering wire is short-circuited. The advantage is that the soldering wire is soft and easy to intercept. It can short-circuit terminals with any spacing in any test project. There is no limit to the size of the terminals. It is more beautiful after the wiring is completed. The dis...

AI Technical Summary

Problems solved by technology

The disadvantage is that the reuse rate is low, and it is a one-time connection. The fuse and solder wire will be broken after repeated bending several times, and the test cannot be continued; the fuse after the small-pitch terminal test has been cut off and the length is too short. It can no longer be used on large-pitch terminals; without an insulating sheath, it is easy to generate corona during high-voltage tests, which affects test results

[0005] 2. Short-circuit through multiple strands of bare copper wires. The advantage is that it is durable, tensile and reusable compared to fuses and tin soldering wires; it can adapt to the connection of terminals with different pitches. The disadvantage is that it cannot control the length of the connecting wires and connect short-pitch terminals. The redundant wire can only be shortened by repeatedly connecting several terminals; copper wire has a certain degree of elasticity, and the copper wire is prone to knotting after repeated use, and it is difficult to untie it, which will affect the continued use and before and after the test. Finishing; without insulating sheath, it is easy to generate corona during high voltage test, which will affect the test results

The disadvantage is that it is necessary to select a suitable length of wire for connection according to the distance between the short-circuit terminals. The amount of equipment is large, and it takes a lot of time to sort out the wires of various lengths before and after the test.

[0008] In the actual work, it becomes very cumbersome due to the need to repeat it. In the process of repeated disconnection, not only the short wires are easily damaged, but also the lengths of the wires are different, and the phenomenon of mutual entanglement often occurs. It is time-consuming and laborious to sort out.

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