DSH 443 Impulse voltage test T2.3

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DSH 443 9 @% q  V; V2 q" v' } 7 @& w& [3 d; e7 c

Impulse voltage test T2.3

Note 1 of table 5 % L, v# S" F. ^" v+ E9 D/ {& o

61543(ed.1) # z( Y9 o7 i4 z( z

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:
$ n8 C' U* M. c* g) z. JThe mentioned note 1 shall be interpreted by replacing the first line by:
! z4 H1 V- {8 L5 P* |4 i“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:
7 M# d& l/ q$ ?4 k3 \- between the metal support....”
* [3 q( A' `6 P/ [9 C
9 H2 j# W; u4 {! C/ j0 S' {