Arc suppression coil device with disconnection structure

Abstract

The invention relates to the technical field of power distribution grounding devices, and especially relates to an arc suppression coil device with a disconnection structure. The device comprises thedisconnection structure, a lightning arrester, a circuit breaker, a Z-shaped grounding transformer, a turn-adjusting arc suppression coil, a voltage-limiting damping resistance box, a microcomputer controller, a disconnection clamp, a wiring board, a protection box and the like. The disconnection clamp and the wiring board are connected and fixed through a threaded fastener, and an anti-looseningspring washer is arranged at a nut. Trapezoidal teeth are arranged on the connecting surface of the disconnection clamp and the wiring board. A connecting bridge of the disconnection clamp is of an arc structure, and the arc structure has certain elasticity and can be used for compensating for deformation caused by thermal expansion and cold contraction and reducing shear force on the threaded fastener. Waterproof foam is arranged around the trapezoidal teeth, and protection wires are arranged outside the disconnection clamp and the wiring board and used for reducing external water vapor and other corrosive substances entering the disconnection mechanism. According to the invention, the grounding current is small, the arc can be automatically extinguished when an instantaneous fault occurs, the working efficiency of maintenance and inspection is high, and the labor cost can be reduced.

Description

technical field [0001] The disclosure relates to the technical field of power distribution and grounding devices, in particular to an arc suppression coil device with a disconnection structure. Background technique [0002] The arc suppression coil is an adjustable inductance coil with an iron core, which is installed at the neutral point of the transformer or generator. When a single-phase ground fault occurs, an inductive current that is nearly equal in magnitude to the ground current but opposite in direction can be formed. This current and the capacitive current can compensate each other, and finally the current at the ground point becomes very small or equal to zero, thereby eliminating Arcing to ground and all hazards arising from it. When testing the arc suppressing coil device, each testing point must be disconnected before testing, so the disconnecting structure is an essential part. [0003] At present, most of the disconnection structures connect the down conduc...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the disconnection structures connect the down conductor and the grounding body together, and they are in the outdoor environment for a long time, which is prone to various problems such as aging, corrosion, and loose fasteners. Absolute grounding cannot be guaranteed. affect security

The disconnection structure in areas with large temperature differences in four seasons will also be deformed due to thermal expansion and contraction. Long-term deformation inside the structure will damage the connection mechanism. The work efficiency is low during inspection and derusting, and the transition consumes manpower and material resources

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