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引用第6楼luqing_sz于2009-02-26 12:31发表的 :
F* v5 M# t- n/ {热缩套管用作基本绝缘,
* A, w6 ~7 g- ^( J. L6 i. _* r1.额定值T,V需达到要求.
/ s+ T8 C5 G6 s; n1 @2.单层需经受1250V/60min耐压 " R8 p. C* @% K0 u- R: l" ?, ]
1。cl 23.5 The insulation of internal wiring shall withstand the electrical stress likely to occur in normal use.
2 u. W' x6 d! U: Y! L, @0 z. Y! k4 f
a voltage of 2000V is applied for 15min between the conductor and metal foil wrapped around the insulation. 9 r2 `* q' h2 {5 R
这里算作内部线了,内部线的绝缘应打2000V。! f$ F6 G# k$ B% ]( [+ s
2 C3 X+ w- C' b( a" V' D.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。
2 C# @# b3 O7 r! f$ W: T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)。! @, x- c* k0 k
# @3 l( c( b) l5 t' h, P) O( A3。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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