|
|
1) with the equipment operating under normal operating conditions, a variable resistive load is connected to the parts under consideration and adjusted to obtain a level of 240 VA. Further adjustment is made, if necessary, to maintain 240 VA for a period of 60 s. If the voltage is 2 V or more, the output power is at a HAZARDOUS ENERGY LEVEL,unless an overcurrent protective device opens during the above test, or for any other reason the power cannot be maintained at 240 VA for 60 s;
4 R' R( r4 @- T2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V4 O; E: W0 Q$ P7 V5 v
or more, and the stored energy, E, calculated from the following equation, exceeds 20 J) _' ?! X+ t8 S* F: X- E! W
如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性! w$ @% N: l6 {; ~
: Y3 x7 W" \4 X9 N
a) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts
0 e! A2 M& L& a, N8 h(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be5 Y) Q' D L3 M, A4 J% i% h
bridged by a metallic object. l5 M0 V# n+ a* Q
b) The likelihood of bridging the parts under consideration is determined by means of the test
# T3 o' ?) i' y! v" @finger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the
7 o. {5 q2 P5 @4 E, A0 jparts with this test finger, applied without appreciable force.5 ]6 J M. o6 `2 F; _; ?& f h! x9 U( Z
你所说的只是一种情况，没有保护装置或其他原因导致提前当机， ENERGY LEVEL超过240VA，
" G9 C x' ]5 g& B* ~5 |* O- r% f% ^5 j持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL" N2 G# q6 {$ h" B
然后根据（a）（b）判断可接触性，才能说Energy hazards是fail or pass |
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2009-11-2 13:40
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡
发表于 2009-11-2 19:18
楼主