DSH 443 Impulse voltage test T2.3

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Impulse voltage test T2.3

Note 1 of table 5

61543(ed.1) / U% c) n" [) o, M) h8 q

/ Y5 ?" I  `: v7 Z' [/ s7 B1 SQuestion:
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.
) A3 N  A- m: Q- \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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