23.3 Electronic cord switches and electronic independently mounted switches shall, without# W/ u4 B6 |7 ]0 k" R+ B: B
endangering their surroundings, withstand the short circuits they may be subjected to.# i& {/ f) B( @. M4 F+ k
Compliance is checked by the following test.
]. B3 C# [$ d, {/ O5 dThe switch is tested in a substantially non-inductive circuit in series with a load impedance and8 t- \4 n9 Q% {1 j6 F/ E' E
a device for limiting the let-through I2t.
0 z) {3 t5 I0 ?/ ]) J- z9 H3 |- NThe prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the
: M ~, j. W O3 Trated voltage of the switch under test.
' d- k) b1 Z# h! ~! o8 I6 a/ hThe prospective let-through I2t value shall be 15 000 A2s.8 ^- F0 c) V! ?
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问题1:电子开关的短路试验如何做?6 J1 k2 s% K" [/ S3 ?
问题2:这些参数如何实现?
2 c3 [2 H) M0 @) ~/ V, w1 c- F8 }1 v6 i; u8 g
NOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional
' m* L6 Z0 ~% x4 \; W- R- Vsynchronization. 问题3:这一句是什么意思? " }3 i7 X+ _) }' J0 q1 d
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