23.3 Electronic cord switches and electronic independently mounted switches shall, without
. z* ^/ x0 Q* r( f- f1 cendangering their surroundings, withstand the short circuits they may be subjected to.5 I2 N- C$ L0 Q7 K
Compliance is checked by the following test.
4 {+ S- R( I2 y2 WThe switch is tested in a substantially non-inductive circuit in series with a load impedance and
2 D! S5 R8 Q8 N3 y0 t' Y5 Ma device for limiting the let-through I2t.
. ~, Z) t6 ^/ IThe prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the. f3 ]" {' Q+ H! I# R4 W
rated voltage of the switch under test.% o7 a/ d" A: C* z; O3 B
The prospective let-through I2t value shall be 15 000 A2s.
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! |: _) B% G5 _! q% f# F& P问题1:电子开关的短路试验如何做?0 R/ E7 \. U4 t. e" |
问题2:这些参数如何实现?4 p/ i' T( Z# T M0 N
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NOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional
* i5 C$ B# z( r8 e' tsynchronization. 问题3:这一句是什么意思?
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