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A.1 In order to determine whether a conductive part is a live part which may cause an electric) d! i+ H5 u- s. ~7 X
shock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and/ q6 h- b' C- r$ ?
the following tests are conducted.; m9 ?' ]( P# n* }0 Y/ W
A.2 The part concerned is a live part if a current of more than 0,7 mA (peak) or 2 mA d.c. is
! e% P! H$ o. S. A2 kmeasured.
- ~2 ]( Q! z4 m$ s' F9 T& n, q% HFor frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the
9 O7 M7 |2 Q, M: Pfrequency in kilohertz, but the result shall not exceed 70 mA (peak).
& N, N9 R6 ~2 i1 f. CThe current flowing between the part concerned and earth is measured.+ @8 Z% Y' C6 a
Compliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.! @5 m$ v7 Q( Y6 _6 @2 [
A.3 The voltage between the part concerned and any accessible part is measured, the0 H3 _- H9 _" N4 ?, v; G
measuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
& h* |- U) B8 @part if a voltage of more than 34 V (peak) is measured.
0 U1 {, G2 z% |/ `- y B/ d- IFor the above test, one pole of the test supply shall be at earth potential. |
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发表于 2010-4-16 17:44
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