国外认证机构的答复：9 }. N. s* @) x: E6 W
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Regarding problem 5, (Clause 22.42), this appears to be a problem of misunderstanding. I will attempt to explain the problem below.
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Please find below a copy of clause 22.42. You will note that there are two assessable items, shown in bullet points.
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9 R; O- `: S& T! ?) \; g% ^Clause 22.42
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i. Protective impedance shall consist of at least two separate components whose impedance is unlikely to change significantly during the lifetime of the appliance. ) {% h. G5 _3 Q. n
6 O; R2 Z- z* E; Y ii. If any one of the components is short-circuited or open-circuited the values specified in 8.1.4 shall not be exceeded.
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+ Z; G8 m( u( JNOTE Resistors complying with test a) of subclause 14.1 of IEC 60065 and class Y capacitors complying with IEC 60384-14 are considered to be components having a sufficiently stable impedance.
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The first bullet point (i) says that the value of the capacitors must remain stable during the life of the capacitor. - D- X5 L+ f' S1 S5 K
5 H8 X" z! R/ _( bThe second bullet point (ii) says that, even though they are stable capacitors, if one of the capacitors should fail, the other capacitor should be capable of providing the required protection alone. ( h- g8 T& L, f) g3 Q! ^
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This is also the reason for the requirement of having two separate components.
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* G7 I; X: S4 Y7 _; cThe test report shows that the chargers meet the requirements of point (i), and it appears rather than fail point (ii) they have assessed it a s not required. This is incorrect. This testing will need to be completed. |
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发表于 2008-9-27 16:18
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