Electric current testing terminal

Abstract

The invention relates to an electric current testing terminal which comprises a terminal body and a connecting piece, wherein the connecting piece is fastened on the terminal body by a screw, and the current line topology of a secondary side of the terminal body adopts a distributed topology, namely, three-phase current lines of the secondary side are respectively separated so as to cause the caloric value to reach a minimum topology; and the connecting piece is made of metal materials. The accumulation of a great of heat in short-circuit can be effectively avoided by improving the current line topology of the secondary side; in addition, the connecting piece can be fully contacted with the screw while being arranged on the terminal body due to special design on the material, thereby the possible discharging hidden troubles can be thoroughly eliminated, and the soundness of a rheological secondary loop and the normal operation of a grid are ensured.

Description

technical field [0001] The invention relates to a current test terminal. Background technique [0002] As we all know, the current test terminal is usually used to check whether the electrical equipment is qualified, and the performance of the current test terminal itself often affects the final acceptance result. However, the existing current test terminal short-circuits the N phases of the three-phase current together, which is easy to generate a lot of heat. In addition, because the connection piece of this type of current test terminal is a zinc-transfer copper connection piece covered with a plastic sheath on the surface, in short When connecting the current test terminal, drive the connecting piece in and tighten it with screws. However, although it can be tightened very tightly when screwing, it is actually just tightening the plastic skin, and the connection surface between the connecting piece and the screw is actually not large. Therefore, in the high-current tes...

AI Technical Summary

Problems solved by technology

[0003] 1. Directly affect the working conditions of the rheology: the open circuit of the rheological secondary circuit will seriously affect the normal service life of the rheology

[0004] 2. For relay protection personnel, rheological open circuit, especially the open circuit of protective rheology, will directly lead to incorrect action of relay protection device and affect the normal operation of power grid

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