Cable clamp for one-time current rise of closed switch cabinet

Abstract

The invention discloses a cable clamp for one-time current rise of a closed switch cabinet. The cable clamp comprises a handle, wherein a current line nose is arranged on the handle, and the current line nose is fixedly connected with a fastening cable clamp. The cable clamp is characterized in that the fastening cable clamp is rhombic. Due to the adoption of the technical scheme, the cable clamp provided by the invention has the characteristics of strong pertinence, convenience in operation, firmness in connection, safety, reliability, strong applicability and the like.

Description

technical field [0001] The invention relates to an electric device, in particular to a wire clip for a test of a closed switch cabinet for a current uplift. Background technique [0002] An upflow test is an indispensable work for the daily protection transmission test. Especially when replacing the CT and verifying the work of the protection device, it is often judged whether there is any error in the secondary wiring of the equipment and whether the protection setting is accurate through a current test. Its workflow is as follows: [0003] Start→Remove the rear cabinet door→Fix the high current generator current clamps at both ends of the CT→Start the high current generator loading current test→Remove the current clamps→Install the rear cabinet door→End. [0004] However, it was found in the work that the internal space of the 10kV closed switchgear is small, and the CT mostly uses the ZZBJ9 type, and its crimping screws are mostly 12mm in diameter, and a few are 10mm. ...

AI Technical Summary

Problems solved by technology

[0004] However, it was found in the work that the internal space of the 10kV closed switchgear is small, and the CT mostly uses the ZZBJ9 type, and the crimping screws are mostly 12mm in diameter, and a few are 10mm. To meet safety requirements, the primary leads on both sides of the CT are usually covered with insulating sheaths, and only the copper bars and screws close to the CT surface are exposed, while the traditional test wire clamp has a relatively large and tight structure to ensure the flow capacity of the contact surface. It is very difficult for one person to operate with one hand, and it is not convenient to use in a closed switch cabinet

[0005]In addition, during the test, only the copper bar screw connecting the CT and the static contact of the switch can only be loosened temporarily, and the connection nose of the output line of the large current generator and the CT should be drawn out at one time After the end is pressed, the test is carried out, and the test is resumed after the end. The process is cumbersome, resulting in a long time-consuming and low work efficiency when doing a current-raising test in a 10kV closed switch cabinet.

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