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引用第6楼luqing_sz于2009-02-26 12:31发表的 :
- M3 `3 x% S* |3 a2 _: I, f2 `热缩套管用作基本绝缘,. Y' U# v8 o/ Z! x/ S- P
1.额定值T,V需达到要求.
# |5 N6 Z* O4 H; n2.单层需经受1250V/60min耐压 & }' D! q/ u4 ~0 Y
1。cl 23.5 The insulation of internal wiring shall withstand the electrical stress likely to occur in normal use.
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a voltage of 2000V is applied for 15min between the conductor and metal foil wrapped around the insulation. , i5 T6 w; ~$ h6 H0 W
这里算作内部线了,内部线的绝缘应打2000V。% K; e6 v/ r' \/ Z) m2 Q! 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。7 M. V! V7 H& }& C" ]: f
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)。3 n9 j& i, x' C' P }
- ]8 {, W; k+ _8 |( d3。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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