Surge suppressor with thermal protective function
By introducing a thermal protection device with an arc extinguishing component and an inclined rail groove design into the surge suppressor, the problem of arc failure and fire in MOV caused by power frequency accident current is solved, and safer and more timely circuit cutting and fire prevention are achieved. Effect.
Inactive Publication Date: 2010-06-16
FOSHAN PROSUAGE ELECTRONICS CO LTD
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Problems solved by technology
But the baffle is only inserted into the gap with a vertical movement and has no effect of blowing out the arc
Method used
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Experimental program
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Effect test
Embodiment Construction
[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0030] Such as figure 2 As shown, Embodiment 1 of the present invention provides a surge suppressor with thermal protection function, which includes a housing cover 1 made of engineering plastics and a base 3 with an assembly plate 2, and the base is provided with Surge suppression components ( figure 2 It is located on the back side and cannot be seen) and thermal protection device 4, the extended part of the a electrode of the surge suppression element protrudes out of the base and becomes a leading A pin 5 of the surge suppressor, and the thermal protection device has a The extended part of the conductive metal member 41 extends out of the base to become another lead-out B pin 6 of the surge suppressor.
[0031] The thermal protection device 4 also includes a...
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The invention discloses a surge suppressor with a thermal protective function, which comprises an outer case and a base having an assembly plate. The base is provided with a surge suppressing element and a thermal protective device; the thermal protective device comprises a metal bulging part which is connected with a b electrode of the surge suppressing element electrically, a compression spring and a slide block which can move on a guide way of the assembly plate and has an arc suppressing member; when the surge suppressor works normally, a conductive metal member and the metal bulging part are electrically connected through a low-temperature solder joint; a power-frequency fault current flows through the surge suppressing element because of failure, then the low-temperature solder joint is melted, the conductive metal member breaks the connection with the metal bulging part, and the spring drives the arc suppressing member on the slide block to move to block off the interrupted gap and generate an air flow which blows out the electric arc between the interrupted gap of the conductive metal member and the metal bulging part; and therefore, the surge suppressor with the thermal protective function provides safer, more instant and reliable circuit protection.
Description
technical field [0001] The invention relates to a circuit protection device, in particular to a surge suppressor with thermal protection function. Background technique [0002] Metal oxide varistors (MOV) are currently being widely used as overvoltage suppression components in power supply lightning protection devices. MOV is a solid-state component composed of polycrystalline semiconductor ceramics. This solid-state component, under normal conditions, only flows a small leakage current. However, when the MOV fails, a large power frequency accident current is obtained from the power source in the MOV and a fire event occurs. In order to prevent the occurrence of fire time, the general technical solution of surge protector (SPD) equipped with MOV is to adopt a mechanical thermal protection mechanism. Due to the good thermal coupling between the thermal protection mechanism and the MOV, once the thermal protection mechanism feels the heat generated by the MOV and the tempera...
Claims
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IPC IPC(8): H02H9/08H02H9/06
CPCH01H2037/762H01H37/761H01C7/126H02H9/06H02H9/08
Owner FOSHAN PROSUAGE ELECTRONICS CO LTD