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引用第3楼79092040于2008-07-21 13:46发表的 :
. h3 Q. \ Z( x# t# g! m. sIEC60335-1 里有这样一段话:
& l q+ h' \' y# F, @ ]& c0 ~) PWhen the glow-wire test of IEC 60695-2-11 is carried out, the temperatures are
& D( D$ v, |5 Q+ p# T: b– 750 °C, for connections which carry a current exceeding 0,2 A during normal operation;+ N4 l# o* a- u7 H* ~- G
– 650 °C, for other connections.
, o$ f, x& T: X+ S: a+ \NOTE 1 Contacts in components such as switch contacts are considered to be connections.
( x- s# d1 j9 O....... 这上面说的是支撑大于0.2A带电部件的零件做750°C,其它的650°C,大于还是小于很好判定。是否支撑带电部件也不难分辨,一般的开关都是要做的。 |
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