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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;9 V2 m |( U* {! D- {
2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V8 m: j# l6 f7 I: @3 q
or more, and the stored energy, E, calculated from the following equation, exceeds 20 J
. ~+ ~/ o9 `5 \0 S2 g" |如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性
" P% d4 a; p/ K9 r3 F( F
: d$ _. s1 J4 @9 ma) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts
; U) Q# f8 u% K' @(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be# M7 x; P) o$ G+ g, Y- ]2 z
bridged by a metallic object.
2 ^; h7 O; H; F+ ~# Tb) The likelihood of bridging the parts under consideration is determined by means of the test0 e& }. `* s0 z" L0 G* m
finger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the$ I& u/ x3 g9 x; i0 ^! P
parts with this test finger, applied without appreciable force.
6 Y& z9 [7 t+ K4 S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，
! W4 ^6 B! R9 `4 t) I持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL
& E# U* v* |5 @) @: u' D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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