DSH 443 Impulse voltage test T2.3
http://decisions.iecee.org/icons/ecblank.gif DSH 443
Impulse voltage test T2.3
Note 1 of table 5
61543(ed.1)
Question:
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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