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引用第6楼luqing_sz于2009-02-26 12:31发表的 :" k s3 i+ B# @& t, Y
热缩套管用作基本绝缘,
( |) ^5 R, Q% v; o0 x1.额定值T,V需达到要求.
5 g) v' E3 W1 E! O: k2.单层需经受1250V/60min耐压 7 z. t: x+ K9 A) m
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.
/ r5 w0 A5 M- \4 O0 {这里算作内部线了,内部线的绝缘应打2000V。
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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。5 t8 W' D# _/ A3 ~
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)。* P6 f& I; `* C* g
, J) z+ L6 \# {, h% W/ {* K3。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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