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|  DSH 4435 q* d) t8 _7 \& y5 B. Q
: M7 a9 h0 Z" X& n0 |7 A- k. Z1 O | Impulse voltage test T2.3) ~( ^; t) m0 @. X- c
| Note 1 of table 5
4 Q/ _. V& X& U& \. f | 61543(ed.1)- G3 T' k7 K8 x' i, [7 r
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& b+ ]3 N, ^9 n3 G* \( W; ^2 N
Question:
% @' d% U6 k" tIn the application of IEC 61543 it was noted by various testing laboratories that note 1 of table 5 (referring to the impulse voltage test T2.3 for immunity to conducted unidirectional transients of the micro-/millisecond time scale) does not give information about the number and the polarity of the impulses to be given.4 i9 \' u! o5 z+ a1 c2 q
Decision:4 O, n* j; l9 T5 }. D% l! _
The mentioned note 1 shall be interpreted by replacing the first line by:
0 s n3 W% q" ?; j2 K“This test shall be carried out with the RCD, in the closed position. A total of five positive and five negative pulses (for each phase angle) shall be applied synchronised to the voltage phase at the zero-crossing (0°) and the peak value of the a.c. voltage wave (90° and 270°), for each of the following tests:% |3 G- k \4 E2 A
- between the metal support....”! x7 ~% `0 e# k3 s, G- k( z
3 k% Z. N0 B) _$ z# d: O X. E
2 F( @& s8 [3 M8 r5 q2 k$ z |
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发表于 2012-9-4 16:42
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