23.3 Electronic cord switches and electronic independently mounted switches shall, without! L) [, U: r: H; H. |+ A- T
endangering their surroundings, withstand the short circuits they may be subjected to.
+ D" g" M; y3 K6 nCompliance is checked by the following test.
4 x9 v) v" v; z8 e# Z7 gThe switch is tested in a substantially non-inductive circuit in series with a load impedance and
. ^4 y8 s( H7 B$ z, n* v. Sa device for limiting the let-through I2t.& \' c0 ]" C- o* p
The prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the% N" z% |4 v$ w6 `. B% Y `1 d6 e
rated voltage of the switch under test. u0 I& Q* b) O4 t9 E* c
The prospective let-through I2t value shall be 15 000 A2s.5 [% j5 m. }* |4 _6 i' M) I
& D! u% |% i# x- L: _! P问题1：电子开关的短路试验如何做？
$ h6 ~9 C' Z* J9 h' S" Z$ N问题2：这些参数如何实现？! U/ r: R8 h- @
7 \, |$ W2 E( {" H- ~3 b% y6 @: w
NOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional 3 e0 s- G, Q" d6 P5 b) i+ n
synchronization. 问题3：这一句是什么意思？
1 n9 ?* ^0 D' X: p* o! z | 
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发表于 2015-10-23 20:06
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