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引用第6楼luqing_sz于2009-02-26 12:31发表的 :
9 s! B$ {- a# ^' F0 L热缩套管用作基本绝缘,
( A( k% x3 h% g5 B1.额定值T,V需达到要求.
6 G, l, r" D5 M2.单层需经受1250V/60min耐压
6 Z5 s6 Y# D# ~4 P6 a% `1。cl 23.5 The insulation of internal wiring shall withstand the electrical stress likely to occur in normal use.
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# g5 {3 N/ E6 Ja voltage of 2000V is applied for 15min between the conductor and metal foil wrapped around the insulation.
6 ]& b6 H2 w' ?1 F, R. H% G3 m. p. P这里算作内部线了,内部线的绝缘应打2000V。. l2 i6 @6 [2 K5 G* U+ @
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.2。你们经常见到热缩套管套在祼线上作基本绝缘的吗?我是不常见。
) G2 [# l* d) F. m倒是经常见到套在有基本绝缘的外皮上起抗更高温度的作用(比如电线外皮上标80度或105度,通常热缩套管为125度)。
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3。在IEC60065 or IEC 60950-1,起附加绝缘作用的单层热缩套管的厚度只要求最少0.4mm. |
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