Baoding Kone Electrical Equipment Co., LTD

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PD series export drop-out fuse

PD1 series export 33kV~36kV drop type fuse

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Product Overview:
  Drop type fuses and pull load drop type fuses are outdoor high voltage protection appliances。It is installed on the high voltage side of the distribution transformer or the branch line of the distribution wire, and is used as the short circuit of the transformer and the line, overload protection and the division and combination of load current。The drop-out fuse consists of an insulating support and a fuse tube. The static contact is installed at both ends of the insulating support, and the moving contact is installed at both ends of the fuse tube. The fuse tube consists of an inner arc absorbing tube and an outer phenolic paper tube or epoxy glass cloth tube。The pull load drop type fuse enhances the elastic auxiliary contact and the arc extinguishing cover, which is used to divide and combine the load current。
In normal operation, the fuse tube forms a closed position after being tensioned with the fuse。When the system fails, the fault current makes the fuse quickly fuse and form an arc, the arc extinguishing tube is affected by the arc scorching, decompose a large amount of gas, so that the tube forms a high pressure, and the longitudinal blowing along the pipeline, the arc is quickly elongated and extinguished。After the fuse is blown,The lower moving contact loses tension and turns down,Locking mechanism,Release the fuse tube,The fuse tube falls,Form a clear breaking position,When the load needs to be pulled,Use the insulated rod to pull the moving contact,Take the initiative now,Static contact remains in contact,Continue to pull the contact with the insulating rod,Auxiliary contacts are also separated,An arc is generated between the auxiliary contacts,The arc is elongated in the hood slit,At the same time, the arc extinguisher produces gas,When the current passes zero,Arcing out。

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