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A.1 In order to determine whether a conductive part is a live part which may cause an electric
1 \1 M$ C3 m: kshock, the lamp controlgear is operated at rated voltage and nominal supply frequency, and& P" r5 S/ ^; ~- B6 l, D( D( K
the following tests are conducted.+ C! e8 ]8 {9 s4 s& x3 e8 s- o- Q& 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. is
* J1 m% m0 b) ~9 R) Ameasured.' v+ n/ Z1 F* K
For frequencies above 1 kHz, the limit of 0,7 mA (peak) is multiplied by the value of the+ U4 X; w" c* t# R$ \
frequency in kilohertz, but the result shall not exceed 70 mA (peak).
: ?0 ?% [) |5 s& FThe current flowing between the part concerned and earth is measured.
6 S) J4 _( l j0 Z) a7 J! }Compliance is checked by measurement in accordance with Figure 4 and 7.1 of IEC 60990.: d# t# D& z" K- s
A.3 The voltage between the part concerned and any accessible part is measured, the. }# m5 w) ?+ H- S8 y8 A
measuring circuit having a non-inductive resistance of 50 kΩ. The part concerned is a live
- \9 M" G) S5 vpart if a voltage of more than 34 V (peak) is measured.
* v4 v% O# O1 z7 ^, v9 V0 E5 o" IFor 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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