A high-voltage fuse suitable for underground oil-immersed distribution transformers

Abstract

The invention relates to a high-voltage fuse suitable for underground oil-immersed distribution transformers, which includes a high-voltage fuse holder immersed in the transformer oil, and a high-voltage fuse holder connected to the top of the high-voltage fuse holder exposed outside the transformer oil tank. The terminal structure, the high-voltage fuse set in the high-voltage fuse holder, the fuse striker arranged inside the top of the high-voltage fuse and the guide rod arranged in the high-voltage fuse holder, and the guide rod The vertical rod part is inserted in the terminal structure, and it also includes a micro switch, which is fixed on the transformer oil tank through a switch mounting bracket erected outside the terminal structure, and the micro switch Connect a lead wire to the top of the switch. The invention not only correctly reflects the state of the high-voltage fuse in real time during the operation of the transformer, but also can provide a real-time phase failure alarm signal, and can also realize remote transmission and relay protection of the alarm signal.

Description

technical field [0001] The invention relates to an underground oil-immersed distribution transformer, in particular to a high-voltage fuse suitable for an underground oil-immersed distribution transformer. Background technique [0002] As we all know, when the transformer fails or is abnormal, the high-voltage fuse in the transformer will fuse itself to cut off the current when the current abnormally rises to a certain height and a certain time, thereby protecting the safe operation of the transformer. However, the existing high-voltage fuses used in underground oil-immersed distribution transformers cannot directly detect the high-voltage fuse signal, and can only indirectly judge the phase failure of the high-voltage side by measuring the low-voltage three-phase phase voltage. Therefore, it cannot be used in transformers. During operation, it directly reflects the fusing state of the high-voltage fuse, and provides a real-time phase-opening alarm signal, so that when the l...

AI Technical Summary

Problems solved by technology

However, the existing high-voltage fuses used in underground oil-immersed distribution transformers cannot directly detect the high-voltage fuse signal, and can only indirectly judge the phase failure of the high-voltage side by measuring the low-voltage three-phase phase voltage. Therefore, it cannot be used in transformers. During operation, it directly reflects the fusing state of the high-voltage fuse, and provides a real-time phase-opening alarm signal, so that when the low-voltage side fails and the low-voltage three-phase phase voltage is abnormal, it will affect the correct judgment of the high-voltage side. the normal operation of the

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