DSH 443 Impulse voltage test T2.3

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DSH 443 % B7 N. B* q% }$ w# G / N6 P1 h  ]* b+ ]4 B

Impulse voltage test T2.3

Note 1 of table 5 ' `6 i( b, y) y- [( \

61543(ed.1)

& e( R1 o* [" V' ?- F) PQuestion:
In 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.
Decision:
& x/ |7 P, U% g8 {& oThe mentioned note 1 shall be interpreted by replacing the first line by:
% Y. g/ A. e" q, y“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:
  X" D5 m  M, c( K- between the metal support....”


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