DSH 443 Impulse voltage test T2.3

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DSH 443

Impulse voltage test T2.3 9 e3 {/ D9 G; P6 d) B" [

Note 1 of table 5

61543(ed.1)

# F8 X" t: H. v. \4 i' xQuestion:
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.
* l2 l9 p# G! d& W- w0 N* V/ dDecision:
7 ^! O6 }  K" u# @4 M7 H' aThe 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:
- @1 w3 x8 \9 D0 C5 q2 e* x' j- between the metal support....”

9 z. k$ r9 {7 Y0 X5 V  z