Quick circuit breaker and novel drop-out quick breaker

Abstract

The invention relates to a quick circuit breaker and a novel drop-out circuit breaker. The novel drop-out quick breaker comprises a base, a drop-out mechanism and a quick circuit breaker, wherein thequick circuit breaker comprises a separable conductive member structure, a pushing mechanism and a detection control module. The circuit breaker has the advantages of being simple in structure, reliable in work and capable of achieving instantaneous circuit breaking.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a quick circuit breaker and a drop-type quick breaker based on vacuum arc extinguishing technology. Background technique [0002] At present, drop-out fuses are installed in medium and low-voltage distribution lines and distribution transformers as short-circuit protection switches, which can reduce the scope of power outages, because they have an obvious disconnection point and have the function of isolating switches. Create a safe working environment and improve the safety of maintenance personnel. It is installed on the distribution transformer and can be used as the main protection of the distribution transformer. It is widely used in medium and high voltage distribution lines and distribution transformers. [0003] The working principle of the drop-out fuse is that the moving contacts at both ends of the fuse tube are fastened by the fuse (melt), after pushing the upper moving contact i...

AI Technical Summary

Problems solved by technology

[0005] 1. When a short-circuit fault occurs in the back-stage equipment, the time before the melt breaks the arc is long, and there is a great possibility that the melt cannot be fused before the outlet switch of the substation cuts off the fault current, resulting in the failure of the drop-out fuse to be isolated correctly. At the point of failure, when the line is reclosed, the faulty equipment is short-circuited again, resulting in the failure of line reclosing and a power outage across the line

[0006] 2. Affected by the arc extinguishing medium and the gas-producing material on the inner wall of the melting tube, the gas production is small and the rate is low. When the arc is generated, the arc cannot be blown and cooled effectively, resulting in poor arc extinguishing ability

[0007] 3. Drop-out fuses are generally installed outdoors. Affected by the wind and rain in the natural environment, the arc suppression tube in the melting tube is prone to moisture expansion, resulting in inner diameter reduction or blockage.

[0012] The above-mentioned patent uses the power of gunpowder explosion to blow the fuse directly. Although this method is direct and fast, but the gunpowder is installed on the guide bar, under the influence of the electromagnetic field generated by the changing high current, it may cause the explosion of the gunpowder and cause malfunction. The guide bar will generate heat under the action of changing high current, and it may also cause the explosion of gunpowder, resulting in malfunction; the failure of the entire device, resulting in serious losses

The above-mentioned patent adopts the method of blasting and turning the guide row to form a fracture, which requires a large space, so the product is too large

In addition, after the switch is exploded, the entire switch needs to be replaced, and the cost of use is too high

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