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開(kāi)關(guān)和保險(xiǎn)絲

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開(kāi)關(guān)和保險(xiǎn)絲 An electric switch is often on a wall near the door of a room. Two wires lead to the lamp in the room. The switch is fixed in one of them. The switch can cause a break in this wire, and then the light goes. The switch can also join the two parts of the wire again, then we get a light. Switch can control many different things. Small switches control lamps and radio sets because th

熔絲型混合式直流限流開(kāi)關(guān)的分析與設(shè)計(jì)

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針對(duì)直流電網(wǎng)短路故障時(shí)迅速產(chǎn)生的短路電流,提出一種零電壓型混合式直流短路電網(wǎng)限流開(kāi)關(guān)拓?fù)浣Y(jié)構(gòu),以超快速電磁斥力式機(jī)械開(kāi)關(guān)為通流支路,用快速限流熔斷器代替固態(tài)開(kāi)關(guān)支路和能量吸收支路的功能。開(kāi)發(fā)出額定功率為640V/2500A的原理樣機(jī),實(shí)驗(yàn)結(jié)果表明,樣機(jī)將預(yù)期峰值為100kA,時(shí)間常數(shù)為4.17ms的短路電流限制在10kA以下,證明所設(shè)計(jì)限流開(kāi)關(guān)工作的快速有效性。

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