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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;
, W6 M0 Z4 ~" F8 V9 m; N2) the stored energy in a capacitor is at a HAZARDOUS ENERGY LEVEL if the voltage, U, is 2 V
7 ^6 { C$ l" c8 }or more, and the stored energy, E, calculated from the following equation, exceeds 20 J
+ ?2 a7 K6 ]. @, @' h; O) \如60950，先判定是否属于HAZARDOUS ENERGY LEVEL，然后再判定可接触性
$ |+ k3 i! F. h0 Y& r- f$ G* l: s$ r: o6 |8 F: J* A
a) A risk of injury due to an energy hazard exists if it is likely that two or more bare parts
" Y0 [" v) J- ^(one of which may be earthed) between which a HAZARDOUS ENERGY LEVEL exists, will be* j- _7 C" l% x, @! q. Q
bridged by a metallic object.
( E# h& ]$ |* | p4 I. @2 Cb) The likelihood of bridging the parts under consideration is determined by means of the test
( S, ~: @ `0 b5 z- @( g2 Jfinger, figure 2A (see 2.1.1.1), in a straight position. It shall not be possible to bridge the
- a# o$ Q! q2 M% T# i' \0 N! x, {parts with this test finger, applied without appreciable force. E+ V- n/ N/ p& D, s. E2 j( o
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，
# u2 R# Q0 y" t$ s. B# d8 `+ ]持续时间达到60s，电压大于2v,才能称作HAZARDOUS ENERGY LEVEL5 O: ]. S2 c B* p m1 _
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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