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引用第6楼luqing_sz于2009-02-26 12:31发表的 :7 e/ O0 y! i8 h: a' r; K% m: E
热缩套管用作基本绝缘,
/ B. B; s2 Z" k* `. ~1.额定值T,V需达到要求.
0 C" [9 U% \8 X2.单层需经受1250V/60min耐压
( k) e5 g7 g1 D. @7 s5 y1 C/ A$ ^1。cl 23.5 The insulation of internal wiring shall withstand the electrical stress likely to occur in normal use.0 [. c/ e; x4 z p( o M
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a voltage of 2000V is applied for 15min between the conductor and metal foil wrapped around the insulation.
/ w5 [# }* H$ J- a8 r这里算作内部线了,内部线的绝缘应打2000V。
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1 U6 f) Z6 x5 h6 h% r; Y) x# @2 P.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。
; T! k2 B9 _" s" a3 R, ~" K) S3 B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)。! c: B; `! Y) N1 h
$ e7 G$ T1 }- _) }9 x3。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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