Short-circuit apparatus for handcart type switch cabinet CT current-rising test

Abstract

The invention discloses a short-circuit apparatus for a handcart type switch cabinet CT current-rising test. The short-circuit apparatus comprises a test clamp, a copper wire lug, two copper wires, acontact plate, a movable joint and a fixed joint; wherein one ends of the two copper wires are aligned and overlapped and fixedly connected with one clamp handle of the test clamp, the copper wire lugis used for tightly pressing the two copper wires, the other end of the first copper wire is connected with the contact plate, the movable joint is arranged on one side of the contact plate, the diameter of the contact plate is equal to the inner diameter of the movable joint, an inner thread is arranged on the inner wall of the movable joint, the other end of the second copper wire is connectedwith the fixed joint, an outer thread is arranged on the outer wall of the fixed joint, the movable joint and the fixed joint are matched and assembled to connect two short-circuit apparatuses. The apparatus is simple in structure, can replace manual wire clamping, and achieves safe, labor-saving and reliable operation. The acceptance, the calibration and the first-aid repair efficiency of the relay protection professional CT is improved. The working intensity and potential safety risk of workers are reduced.

Description

technical field [0001] The invention relates to a data and power transmission device, in particular to a short circuit device for CT up-current test of a handcart type switch cabinet. Background technique [0002] Most of the high-voltage rooms of existing substations use rows of switch cabinets as the low-voltage side intervals (including the main transformer low-voltage side, capacitors, station transformers, line outlets, etc., each outlet is also called "outlet interval"), and very few parts are 35kV The medium voltage measurement also adopts the form of switchgear outlets. Taking the 10kV low-voltage side switchgear as an example, for a substation with multi-branch wiring on the low-voltage side, for each additional section of 10kV bus, the corresponding outlet will increase 6-8 outlet intervals, and each Each outlet interval has an independent current transformer (abbreviated as CT), and each CT includes at least three windings for protection, measurement and metering....

AI Technical Summary

Problems solved by technology

Due to the narrow space of the cable room behind the switchgear, it is inconvenient to disassemble and install. It takes about 20 minutes to complete each interval. It will take a lot of time to complete the up-current test of all intervals, which not only affects the acceptance progress, but also increases the up-current difficulty of work

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