Internal-insertion external-clamping type current test wire clamp

Abstract

The invention discloses an internal-insertion external-clamping type current test wire clamp. The internal-insertion external-clamping type current test wire clamp comprises a current plug and an alligator clip, the alligator clip comprises an upper jaw, a lower jaw, a rotation shaft, an external clamp and a holding portion, the tail portion of the current plug is fixed on the rotation shaft, the upper jaw and the lower jaw are clamped on a cylindrical surface of the current plug, the external clamp is installed on the rear end surface of the upper jaw, the surface of the external clamp is provided with a rubber insulation layer, the rear end of the lower jaw is provided with the holding portion, the holding portion comprises a hollow-core copper pipe disposed in an internal layer and a rubber insulation layer installed on the surface of the hollow-core copper pipe, and the hollow-core copper pipe has an internal diameter of 4mm and an external diameter of 5mm. The structure is simple, the current plug is fastened through the alligator clip, neither the current plug itself nor current insertion holes are damaged, fastening is realized through the alligator clip, the operation is simple, the wiring is convenient, half-arc surfaces of the upper jaw and the lower jaw of the alligator clip are in contact with the outer surfaces of the current insertion holes, and the diversion effect is good.

Description

technical field [0001] The invention relates to the technical field of wire clamps, in particular to an internally inserted and externally clamped current test wire clamp. Background technique [0002] The power supply company needs to regularly carry out calibration and inspection work on the relevant electric energy meters in the substation every year. To verify the timing of the electric energy meters in the substation, it is necessary to connect the current of the calibration instrument into the secondary measurement current circuit in series to improve the accuracy of the calibration. A current plug is required, and existing current plugs have the following disadvantages: [0003] 1. The swollen top part of the current plug contacts the inner surface of the current socket in the form of point contact, that is, point-to-surface contact, the error is large, and the contact is not strong; [0004] 2. It is time-consuming and labor-intensive to tighten the plastic nut at t...

AI Technical Summary

Problems solved by technology

[0003] 1. The swollen top part of the current plug contacts the inner surface of the current socket in the form of point contact, that is, point-to-surface contact, the error is large, and the contact is not strong;

[0004] 2. It is time-consuming and labor-intensive to tighten the plastic nut at the back end of the current plug to ensure contact each time;

[0005] 3. The common current plug will not only damage itself after a long time, but also cause damage to the current jack

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