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A.1 In order to determine whether a conductive part is a live part which may cause an electric
7 z8 J' G7 H, Pshock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and" d1 I4 L* x/ x" i+ h6 t
the following tests are conducted.
/ P* F# c5 n; t: p. o& ^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
: n3 `8 D# p$ k; @1 m3 s2 Umeasured.
8 R2 o+ `) a- |4 G) ]8 I2 ?6 TFor frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the! a$ U6 g J/ a
frequency in kilohertz, but the result shall not exceed 70 mA (peak).
& o# b/ N6 @! ]) k* HThe current flowing between the part concerned and earth is measured.
) t5 y4 V* B$ i* v! Q4 f8 g* fCompliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.! q, O, N/ X8 ^
A.3 The voltage between the part concerned and any accessible part is measured, the
- `/ C' z3 V" L5 R2 _+ F6 Emeasuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live9 a2 y* Q( ]$ H: Y* r0 e
part if a voltage of more than 34 V (peak) is measured.
3 `' a6 p! F3 X4 z6 c" Y ~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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