23.3 Electronic cord switches and electronic independently mounted switches shall, without
0 w: o% j: U* ?% i: M5 N: aendangering their surroundings, withstand the short circuits they may be subjected to.+ a" q$ U$ k4 V: o. |
Compliance is checked by the following test.: n3 q! g4 o9 ^8 I
The switch is tested in a substantially non-inductive circuit in series with a load impedance and
+ J k; `# h/ x% P/ q; M2 P; ja device for limiting the let-through I2t.2 T$ H& u8 w. x4 K
The prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the, _1 X: |# s/ v% F( P' a
rated voltage of the switch under test.$ J6 P( K- l: ^8 R+ f
The prospective let-through I2t value shall be 15 000 A2s.
+ H7 Q4 |* S2 c$ A3 r. a2 w4 `
5 _) r6 F3 b5 \" G问题1：电子开关的短路试验如何做？0 Y- T$ N& G7 m( _: p. q' q
问题2：这些参数如何实现？
* R( _5 ?! }7 s( ]( i
- }! ]' Q! y8 x% b8 P5 @) `NOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional
$ g- v( L$ E8 b4 P. Psynchronization. 问题3：这一句是什么意思？ & H; t; f9 L& e4 x! `0 m2 H
| 
/2 
|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 2015-10-23 20:06
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡