Low-voltage complete set power distribution cabinet fault indicator

Abstract

The invention provides a low-voltage complete set power distribution cabinet fault indicator, and belongs to the technical field of electrical detection. The indicator comprises an indicator host, a short circuit sensor, a power supply cable, a grounding sensor and a sensing cable. The indicator host is connected with the short circuit sensor and the grounding sensor through the sensing cable; andthe short circuit sensor is nested on the outer surface of the branch cable of the power supply cable. The low-voltage complete set power distribution cabinet fault indicator is provided with a fixing bolt rod, an internal hexagonal wrench is used for screwing an internal screw rod to push a sliding plate and a power connection block to get close to each other until the sliding plate and the power connection block are attached, so that the second electromagnetic coil is powered on to generate a magnetic field and attract the permanent magnet and the iron box under the action of magnetic fieldattraction; and the fixing bolt rod is synchronously driven to be clamped in the open groove to be fixed, so that the fixing bolt rod can quickly buckle and fix the annular plate after the second electromagnetic coil is powered on, and the disassembly and assembly efficiency and the fixing stability of the annular plate during use of the annular plate are greatly improved.

Description

technical field [0001] The invention relates to the technical field of electric detection, and more specifically, relates to a fault indicator. Background technique [0002] The fault indicator is an electromagnetic induction device that can reflect the passage of a short-circuit current and a fault sign (red card) appears. The fault indicator is installed along the distribution line. Once the line fails, the short-circuit current flows and the fault occurs. The indicator will act, and the red card of the fault sign will appear. According to the application object, the fault indicator can be divided into three types: overhead type, cable type and panel type. The main unit of the indicator is installed on the door of the power distribution cabinet, and the short-circuit sensor and the grounding sensor are respectively installed at the corresponding positions of the power supply cables. The data signal transmission between the main unit of the indicator and the short-circuit s...

AI Technical Summary

Problems solved by technology

[0002] The fault indicator is an electromagnetic induction device that can reflect the passage of a short-circuit current and a fault sign (red card) appears. The fault indicator is installed along the distribution line. Once the line fails, the short-circuit current flows and the fault occurs. The indicator will act, and the red card of the fault sign will appear. According to the application object, the fault indicator can be divided into three types: overhead type, cable type and panel type. The main unit of the indicator is installed on the door of the power distribution cabinet, and the short-circuit sensor and the grounding sensor are respectively installed at the corresponding positions of the power supply cables. The data signal transmission between the main unit of the indicator and the short-circuit sensor and the grounding sensor needs to be carried out through a specific optical cable. However, the binding post on the existing indicator main unit generally needs to be connected with more than two or three optical cables at the same time, but in the process of fixing the optical cable, the locking top cap is generally used to clamp the binding post to realize the fixing of the optical cable, which is prone to cable failure. The situation of falling off occurs. Secondly, the separation of the ring plate in the existing short-circuit sensor is mostly achieved by turning the fixing screw. This method not only makes the disassembly of the ring plate cumbersome, but also the screw relies on a single thread to squeeze the ring plate. Fixed, it is easy to make the ring plate loose, which affects the fixing of the ring plate to the power supply cable

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