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DC fuse

A fuse and housing technology, applied in the field of DC fuses, can solve the problems of short service life and large loss, and achieve the effect of long service life and reduced maintenance cost

Inactive Publication Date: 2020-05-19
吴妍佩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of large loss and short service life in the prior art, and propose a DC fuse

Method used

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Embodiment

[0020] refer to Figure 1-3 , a DC fuse, comprising a housing 1, the inner wall of the housing 1 is fixed with an overload load 2, a short circuit load 3 and a first power connection plate 4, the bottom of the housing 1 is fixed with a fixed spring 5, and the upper end of the fixed spring 5 is fixed with a first Two electric connection plates 6, the upper ends of the first electric connection plate 4 and the second electric connection plate 6 are mutually resisted to have a connection pole 7, and the top of the casing 1 is fixed with a capacitor 8 and an overload electromagnet 9, and the bottom of the overload electromagnet 9 is connected to The upper end of the pole 7 is jointly fixed with a connecting spring 10, the inner wall of the casing 1 is fixed with a thermistor 11, and the inner bottom of the casing 1 is provided with a short-circuit protection mechanism.

[0021] The short-circuit protection mechanism includes an inductance coil 12, a forward electromagnet 13, and a...

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Abstract

The invention discloses a DC fuse, which comprises a housing, an overload load, a short-circuit load and a first power connection plate are fixed to the inner wall of the housing. A fixed spring is fixed at the bottom of the housing; a second power connection plate is fixed at the upper end of the fixed spring; the upper end of the first power connection plate and the upper end of the second powerconnection plate jointly abut against a power connection rod; a capacitor and an overload electromagnet are fixed to the top of the housing; a connection spring is jointly fixed to the bottom of theoverload electromagnet and the upper end of the power connection rod; and a thermistor is fixed to the inner wall of the housing. The DC fuse has the advantages that when an external circuit is shortcircuited, current in a line is obviously increased, and the power connection rod still shifts and resets; and but due to the fact that the short circuit current is large, the magnetic force difference value of the forward electromagnet and the reverse electromagnet is obviously increased by multiple, the permanent magnet can move downwards under the magnetic force attraction effect and then is attracted to an interception plate, the external circuit is always kept disconnected, and secondary damage caused by secondary short circuit is avoided.

Description

technical field [0001] The invention relates to the technical field of fuses, in particular to a DC fuse. Background technique [0002] Fuse refers to an electrical appliance that fuses the melt and disconnects the circuit with the heat generated by itself when the current exceeds the specified value; device. [0003] The current fuses mainly include disposable fuses and resettable fuses; once the current disposable fuses are blown, they need to be replaced as a whole, which is very inconvenient, and artificial replacement is very inconvenient, and there are certain safety hazards; [0004] The current recoverable fuse is mainly in the form of a bimetal thermal relay, and its on-off parts are composed of bimetal with different thermal deformation coefficients. When the current is too large and the temperature of the bimetal is too high, the bimetal will deform due to If the contact is disconnected and then connected after cooling, the deformed metal sheet is easily damaged...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/40H01H71/08H01H71/32
CPCH01H71/08H01H71/32H01H71/402H01H2071/088
Inventor 吴妍佩秦帅
Owner 吴妍佩
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