A distribution network line drop switch

Abstract

The invention provides a drop type switch for a distribution network line. The drop type switch comprises a composite insulator, an upper glass fiber protector tube, a lower glass fiber protector tube and a mounting bracket, wherein the composite insulator is fixed on the mounting bracket; terminals are arranged at two ends of the composite insulator respectively; the upper glass fiber protector tube and the upper glass fiber protector tube are hinged below the composite insulator after one end of the upper glass fiber protector tube is connected with one end of the lower glass fiber protector tube; the two glass fiber protector tubes can freely swing oppositely; the other ends of the two glass fiber protector tubes are connected with the terminals at two ends of the composite insulator through a separating mechanism respectively; the separating mechanism comprises two groups of thermal bimetal sheets which are overlapped together; the overall mechanism is supported by the thermal bimetal sheets; the two groups of thermal bimetal sheets are bent and separated in opposite directions; the glass fiber protector tubes fall off; connection with the terminals is cut off; the on-pole operation time is shortened by the drop type switch; the structure is simple; and the implementation process is fast, convenient, safe and reliable, so that the work efficiency is improved.

Description

【Technical field】 [0001] The invention relates to the field of distribution network line switches, in particular to a distribution network line drop switch. 【Background technique】 [0002] At present, most of the 10kV and below lines used in the distribution network are drop-out fuses. During operation, when a device or line has a short-circuit fault, an excessive current will be generated in the drop-out fuse, causing the fuse in the fuse tube to blow, and the drop-out fuse will disconnect the line. The staff needs to remove the drop fuse and replace the fuse, which is troublesome and time-consuming. [0003] When the line power supply is switched on and off the drop fuse, if the operation is improper, the fuse will be blown, and the fuse needs to be replaced again to repeat the work and prolong the working time on the pole. In addition, in the case of a short-circuit fault, the arc cannot be extinguished in time after the melt is blown, and it is easy to burn or explode ...

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