|
|
引用第2楼roy517于2007-11-06 12:02发表的 :
8 P! \; b# ]- _. d为什么呢？能说明原因吗？麻烦了！
0 M& {2 P0 B, _& SUL1310+ Q7 p5 i$ I, ~3 F, Z* q# x
) q' t5 H) R! N1 [9 n F
14.2.2 The maximum voltages which may be accessible in accordance with 14.2.1(a) are:
# s+ o9 V0 W0 L& Ra) 42.4 V peak for sinusoidal or nonsinusoidal AC;
& B2 _5 U. d R2 u/ H- R3 z7 vb) 60 V for continuous DC;
+ `4 b- U4 R! `: R+ E, ?c) 24.8 V peak for DC interrupted at a rate of 200 Hz or less with approximately 50 percent duty cycle; and
, g& P! V" O9 n8 e% s1 hd) As indicated in Figure 14.3 for combinations of AC and DC.
0 s# U4 `# d3 W) ?: B; F0 Q6 d8 ^% kFor the purpose of this requirement, initial transients lasting less than 200 milliseconds may be ignored. Since short term peak voltage is of interest during tests involving a fault, voltages are to be monitored by using a storage oscilloscope for the first two seconds after any fault is introduced.
! D f" h! }! |
4 A+ i/ j, P) \$ c$ U
/ J/ [6 L g& A4 A2 h& E"Since short term peak voltage is of interest during tests involving a fault," |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2007-11-6 11:53
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
楼主
发表于 2007-11-6 12:20