DSH 443 Impulse voltage test T2.3

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DSH 443 % I* ~7 ?$ q) J2 ~5 O* z) I7 B

Impulse voltage test T2.3 2 W7 W1 t5 w$ N0 O& t6 P

Note 1 of table 5 ) \3 ~" g* j9 j) X% }: m8 X

61543(ed.1) " H5 v6 @' c. k4 e6 U  U, L

Question:
$ u! m1 j3 c: q' d* t9 ]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:
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:
- between the metal support....”


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