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開關(guān)和保險絲

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開關(guān)和保險絲 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

刀閘開關(guān)熔絲過負(fù)荷殘留物形貌特征分析

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利用火災(zāi)痕跡物證綜合實驗臺制備了熔絲在下屬電路不同過負(fù)荷條件下的殘留物,用掃描電子顯微鏡對熔絲踐留物形貌特征進(jìn)行了觀察和分析。結(jié)果表明:在不同的過負(fù)荷條件下,電流越大,熔絲殘留物表面氧化物越多,斷口處的韌窩越大、越深。

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