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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;. l+ d" K) o5 q. K' i, P" D: y7 i
2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V
; ]$ w/ j5 Z. E! Z5 k3 {or more, and the stored energy, E, calculated from the following equation, exceeds 20 J4 G! e/ T+ a* b) h; n1 O
如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性! ~' {# {' m; i5 R9 x1 O3 m' C
5 U0 V9 w# ~3 H7 Y' c; S. q' ^# b1 A
a) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts6 E% n& p4 Y: S/ D X4 J
(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be7 K4 v2 @" j5 j9 u/ _8 F4 [
bridged by a metallic object.& x& Q, H% f, B) V/ h: M2 t( S
b) The likelihood of bridging the parts under consideration is determined by means of the test) H; p; L" ]/ W$ |# h* ?: C; r
finger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the0 e$ |1 _5 S8 F9 t# \
parts with this test finger, applied without appreciable force." ~0 a! B! K0 ~3 H- k! ]* L7 ~
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，
3 A: W6 e, C( ~( |& h( {; M w! n) j持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL/ \4 I# J, \& _8 g( C; i; m- z
然后根据（a）（b）判断可接触性，才能说Energy hazards是fail or pass |
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发表于 2009-11-2 13:40
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发表于 2009-11-2 19:18
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