23.3 Electronic cord switches and electronic independently mounted switches shall, without6 S; N: f/ g; x- s% m% |9 ^# w6 l3 Y/ b
endangering their surroundings, withstand the short circuits they may be subjected to.& A# C8 I8 J/ h7 K" Z- ?
Compliance is checked by the following test.; p" |/ ^, h/ ^# d" j4 y
The switch is tested in a substantially non-inductive circuit in series with a load impedance and1 _( A" [5 i0 n! K5 K) m
a device for limiting the let-through I2t.1 y$ y# z. j* ~- |
The prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the& z5 `) u# e) \' Q6 T( L5 U
rated voltage of the switch under test.% |: x3 t7 ~9 ]8 U+ F7 `
The prospective let-through I2t value shall be 15 000 A2s.! B' @9 b# Z% K) g1 E
0 B- K+ E c7 Q问题1：电子开关的短路试验如何做？$ B6 }3 k; c7 ?& I0 Y5 c8 O
问题2：这些参数如何实现？1 ]1 S ^6 Q) C1 R. m7 \7 V ?- h
" x+ R# m' f0 J' ONOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional
8 H4 M5 v/ o( x' e# Vsynchronization. 问题3：这一句是什么意思？ 4 e8 A4 B5 O$ S# q) B! @1 }
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发表于 2015-10-23 20:06
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