23.3 Electronic cord switches and electronic independently mounted switches shall, without
0 Y9 U! V5 d; L1 E2 g! s% _: vendangering their surroundings, withstand the short circuits they may be subjected to.
1 U- p' e: G0 |$ n7 l0 ]Compliance is checked by the following test.+ i6 i% ^9 C0 N _5 H: l
The switch is tested in a substantially non-inductive circuit in series with a load impedance and
$ B, X u" |7 x2 ]- {a device for limiting the let-through I2t.
5 O" B: u8 p& N5 n; L: cThe prospective short circuit of the supply shall be 1 500 A r.m.s. at a voltage equal to the# v, L) Y$ J0 \6 q! h. ?7 R
rated voltage of the switch under test." U' j7 E- k. j7 v8 m
The prospective let-through I2t value shall be 15 000 A2s.8 {& [0 z# j0 e6 k3 ^
) I: S3 r. v( I5 B# X. ]
问题1：电子开关的短路试验如何做？( Z9 Q! b# O* u6 [8 e" E& q
问题2：这些参数如何实现？! ~+ t/ g' R1 _% Z; a" y) \
5 ]8 e, k3 M' G$ O* i3 \2 g. ^0 j
NOTE 7 Attention is drawn to thefact that solenoid operated pneumatic means may result in an unintentional 6 T. h Q$ I: [6 j2 I
synchronization. 问题3：这一句是什么意思？
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发表于 2015-10-23 20:06
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