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仪器图片网络上下的，之前没有拍照，所以图片可能不清楚， 作者: luweibin4520 时间: 2024-2-28 15:10
3.5.9 % G# _! z: s0 y+ F ~; r0 qNORMAL CONDITION; u3 |0 [4 F/ j& t! v
condition in which all means for protection against HAZARDS are intact " o2 _0 ~- w. F( D' h$ {
3.5.10 ) J' }, v% B; g+ S: L
SINGLE FAULT CONDITION, n- I/ `5 v* A. d5 z# t) X% L% W
condition in which one means for protection against HAZARD is defective or one fault is present ) w1 n& L. N0 {: t% r( n3 gwhich could cause a HAZARD' k9 [+ [7 T# `; _3 m3 |
NOTE If a SINGLE FAULT CONDITION results unavoidably in one or more other fault conditions, all the failures are ! }6 K+ z5 j" K* A' h, v9 }
considered as one SINGLE FAULT CONDITION [IEC Guide 104].$ y! b3 o1 A4 A) V5 Z4 O/ G* ?) \
