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A.1 In order to determine whether a conductive part is a live part which may cause an electric
) P; S1 v0 X9 `) A& b8 O6 I. Dshock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and
- ]% r) }/ ]! ] U1 Zthe following tests are conducted. i/ `! `* v% L/ y# B
A.2 The part concerned is a live part if a current of more than 0,7 mA (peak) or 2 mA d.c. is5 J. I, t7 S1 Y# Z7 M7 `; E
measured.! W# V9 M8 G* g$ |! a
For frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the/ |' ~# m& [' f% Q( ]/ h3 K I
frequency in kilohertz, but the result shall not exceed 70 mA (peak)., W1 D$ X7 J5 @9 K8 E
The current flowing between the part concerned and earth is measured.9 n3 s9 z1 t8 y% E: V6 a
Compliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.
9 g1 z: {: H" i( \A.3 The voltage between the part concerned and any accessible part is measured, the9 E, ?/ m( h7 V+ J" q. V
measuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
" b9 I( X/ J! F) v& Rpart if a voltage of more than 34 V (peak) is measured.7 A f$ ~6 [" a# W! {7 O5 l3 ~0 M
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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