DSH 443 Impulse voltage test T2.3

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DSH 443 5 p" n* u8 v+ K/ U6 T8 j 8 V  C, \' C. ?# [3 i

Impulse voltage test T2.3

Note 1 of table 5 3 V0 x& P& G7 S1 X

61543(ed.1)

' a- |' u( V7 H) jQuestion:
* Z' P. w- R  z; @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.
( {5 |( k( w- ^; f5 M% `0 aDecision:
The mentioned note 1 shall be interpreted by replacing the first line by:
“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:
( L# v2 \& u% K2 z  L- between the metal support....”


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