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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;' j. r; E* }6 b6 m; I8 I6 z" o' c
2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V
2 P5 z- A9 {! ]- f# W! Tor more, and the stored energy, E, calculated from the following equation, exceeds 20 J% P( H3 S; z/ n4 O
如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性7 b$ D: @7 @% V0 _) z
3 a$ o4 g' _3 T; Y! e0 V6 X
a) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts
4 s4 ^, s& n8 ~- i. S- L5 G(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be9 v3 i) Z% `6 [: _, e2 j) ^+ A: z
bridged by a metallic object.1 s* f# a# V5 B; ~0 R3 [. R2 h m
b) The likelihood of bridging the parts under consideration is determined by means of the test; V, `( U: t* u9 ?( @# f/ M! c
finger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the
* L, N# k! j6 W, D7 `" fparts with this test finger, applied without appreciable force.
2 A- I. i! p! B! v! W2 Y _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，
F1 P; A; M% b+ p( @' g2 L8 S% t持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL7 B- g* T$ a8 v: T# m
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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