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A.1 In order to determine whether a conductive part is a live part which may cause an electric9 J, ^# [- _, Q7 b
shock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and
- T4 t n& a' _the following tests are conducted.
6 H8 g! x5 R5 k) H! U( B; W% IA.2 The part concerned is a live part if a current of more than 0,7 mA (peak) or 2 mA d.c. is
; ^ K5 S7 H5 vmeasured. j0 n' ~/ G6 t' i) s
For frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the2 H& o! E6 c. ~
frequency in kilohertz, but the result shall not exceed 70 mA (peak).
! z$ k) M9 z0 nThe current flowing between the part concerned and earth is measured.
% m2 Y1 i9 ^6 vCompliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990." [* R* Z' `* n5 m" \
A.3 The voltage between the part concerned and any accessible part is measured, the
0 a1 h. e! ~ r: B2 u0 Emeasuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
1 Y/ D! B/ s( @/ Wpart if a voltage of more than 34 V (peak) is measured.0 M1 G- O1 R: f
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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