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A.1 In order to determine whether a conductive part is a live part which may cause an electric2 L$ m: m5 |6 F7 W
shock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and
5 }$ c. T/ O% D8 l8 H1 ]7 ^$ Ithe following tests are conducted.
& p8 w, q: Z- f5 bA.2 The part concerned is a live part if a current of more than 0,7 mA (peak) or 2 mA d.c. is& ]. D4 k1 J: w0 _
measured.
& c) N% Q$ R' s5 YFor frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the
5 m* ]5 j" P: qfrequency in kilohertz, but the result shall not exceed 70 mA (peak).
6 N/ x c2 D8 wThe current flowing between the part concerned and earth is measured.+ Q) j" v( L/ x. D& ?
Compliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.
n/ w1 T" u& w3 u8 D. n) yA.3 The voltage between the part concerned and any accessible part is measured, the! O" u4 D5 c& g$ \
measuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
: k0 @& C5 c2 Wpart if a voltage of more than 34 V (peak) is measured.% |3 e8 ?; y" B0 I
For 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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