Safety test clamp for relay protection loop terminal

Abstract

A safety test clamp for a relay protection loop terminal relates to the technical field of electric power, and comprises a clamping part, a first handle, a second handle, clamping arms and a connecting piece; the clamping part is arranged at one end of the first handle and one end of the second handle, the clamping arms are respectively arranged at one side of the first handle and one side of the second handle, the clamping arms enable the first handle and the second handle to be connected through the connecting piece, the other end of the first handle and the other end of the second handle are provided with through holes respectively, one through hole is provided with a fastening piece, the fastening piece is fixedly matched with the other through hole, and through the clamping part with the adjustable size and tightness degree, a terminal screw is clamped by using the clamping part, and the first handle and the second handle are fixed through the fastening piece, so that the problems of open circuit of a current loop, short circuit of a voltage loop, misoperation of equipment and the like caused by falling of the terminal screw during wire clamping test are avoided.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a safety test clip for relay protection circuit terminals. Background technique [0002] At present, in order to prevent the occurrence of personal injury and death incidents caused by the risk of open circuit of the current loop, the terminals of the secondary current loop are mostly OT terminals. It is not easy to fix when the test clamp is added, and it is easy to fall off when the test clip is added. This will not only increase the risk of personal injury and death caused by the open circuit of the current circuit, but also easily cause accidental contact with the live circuit next to it, resulting in malfunction of protection. , DC grounding and other accidents. [0003] In order to ensure uninterrupted operation, it is necessary to short-circuit the current loop and conduct an incremental test on the terminals of the current loop. The currently used clamps cannot f...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to prevent the occurrence of personal injury and death incidents caused by the risk of open circuit of the current loop, the terminals of the secondary current loop are mostly OT terminals. It is not easy to fix when the test clamp is added, and it is easy to fall off when the test clip is added. This will not only increase the risk of personal injury and death caused by the open circuit of the current circuit, but also easily cause accidental contact with the live circuit next to it, resulting in malfunction of protection. , DC grounding and other accidents

[0003] In order to ensure uninterrupted operation, it is necessary to short-circuit the current loop and conduct an incremental test on the terminals of the current loop. The currently used clamps cannot form a completely consistent contact with the terminal screws on site, and loosening and misuse are prone to occur during the work process. In the case of collision, it is very likely that there will be accidents of protection malfunction and DC grounding

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