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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;
/ M1 r6 L' e' G# ]2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V
6 @8 t6 J: g2 C9 _! x- z' S Nor more, and the stored energy, E, calculated from the following equation, exceeds 20 J
. t1 w; ?. g5 N5 V) k$ e4 _, ]! p如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性
7 B3 v" l' r7 {) a$ u; ~( j6 y! a' n) V3 Y5 R
a) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts
8 k. `4 F# l/ b(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be
1 j& t; T: g7 V0 @* [( @ c, Abridged by a metallic object.2 V% X d4 y9 E6 t# T" |! P0 r
b) The likelihood of bridging the parts under consideration is determined by means of the test+ `9 N1 l) C$ _* ]
finger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the' O" C `, d @0 l J
parts with this test finger, applied without appreciable force.
/ w% C$ [4 V S8 Y+ g/ ]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，; a5 N" Y+ w9 a3 [: @0 L% a5 f
持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL' O) r$ L% O- p
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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