Test terminal with non-short-circuit mis-disconnection preventing function

Abstract

The invention belongs to the technical field of terminal devices and relates to a test terminal with a non-short-circuit mis-disconnection preventing function. The test terminal comprises a first wiring device, a second wiring device, a connecting block and an insulation casing, wherein the first wiring device and the second wiring device are connected through the connecting block, the first wiring device comprises a first wiring jack, an inverted-T-shaped round shaft is arranged at the bottom of the first wiring jack, the bottom of the inverted-T-shaped round shaft is connected with a spring, the first wiring jack is sleeved with a sleeve with a side opening, a downward press part with a groove is arranged at the top of the sleeve, a cylinder connected with the inverted-T-shaped round shaft and provided with a bulge structure is also arranged in the sleeve, and the groove of the downward press part is matched with the bulge structure of the cylinder; the connecting block comprises an upper connecting piece and a lower connecting piece, and a U-shaped fork is arranged on one side of the lower connecting piece; insulation baffles are arranged at two ends of the upper connecting piece. The test terminal with the non-short-circuit mis-disconnection preventing function is simple in structure and can effectively prevent safety accidents caused by misoperation.

Description

technical field [0001] The invention belongs to the technical field of terminal devices, and in particular relates to a test terminal with the function of preventing false disconnection without short circuit. Background technique [0002] Power system relay protection screens, terminal boxes or control boxes and other screen cabinets usually use terminals to realize the transfer and connection of secondary circuit cables. Due to the needs of the test, some terminals are equipped with terminal connecting pieces and test line jacks. The connecting piece is used to connect the metal parts at both ends of the terminal. There are screws on the top, loosen the screws, and the connecting piece can be manually moved to realize the "connection" at both ends of the terminal. There are two states of "disconnected" and "disconnected"; tightening the screw will lock and fix the connecting piece in the current state, achieving a reliable connection or disconnection effect. The connection...

AI Technical Summary

Problems solved by technology

[0003]However, the test terminal in the prior art has high requirements on the professional ability of the operator. When using it, it must be operated in full accordance with the prescribed operation sequence and cannot be reversed. If the operation sequence is wrong, it will directly cause the open circuit of the current transformer artificially, and the current transformer in operation will induce a high voltage of tens of thousands of volts at both ends of the disconnected terminal connection piece, which will cause a shock. Wear insulation, instantaneous discharge and fire, causing personal injury to the working staff and surrounding personnel, and will also burn out the surrounding electrical equipment; the conventional test terminal lacks the anti-error function, and cannot realize the blocking function of the process operation, completely relying on The subjective control of the staff has a high probability of making mistakes, and once a mistake occurs, the consequences will be serious

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