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A.1 In order to determine whether a conductive part is a live part which may cause an electric8 y% c- X" b! i: L5 H
shock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and
9 z" } K& c4 v G$ x) m4 _: i# Xthe following tests are conducted.
* u/ Z i- C+ U3 n, n9 Z) hA.2 The part concerned is a live part if a current of more than 0,7 mA (peak) or 2 mA d.c. is
0 P9 v7 P$ u6 Z/ U, ?; H( Imeasured.
6 v; p- G9 N& l$ s7 }For frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the% Q3 r' T( o6 `/ z8 M; ^' ]" P+ K2 U
frequency in kilohertz, but the result shall not exceed 70 mA (peak).5 m7 ?2 M9 D6 k0 ~5 K- `! T, f
The current flowing between the part concerned and earth is measured.
1 @7 T3 U9 [7 s( }$ I @ RCompliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.
5 B! l8 F% ~4 y* V: h6 o7 D! X: W& W, uA.3 The voltage between the part concerned and any accessible part is measured, the
- ? U. C- p. H8 M! zmeasuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
; r# ]6 f* A' P) g# Z& npart if a voltage of more than 34 V (peak) is measured." R5 F1 g, N' J* W/ R0 ?+ `
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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