DSH 443 Impulse voltage test T2.3

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DSH 443 5 j- i0 m5 S& R3 o, v7 @

Impulse voltage test T2.3 + Y- x# K# j, m6 k

Note 1 of table 5 + N! b! p+ n$ B9 v# M

61543(ed.1) 0 i% M' e& T0 s' ~* p

# {( F3 ~+ @* o' M( nQuestion:
, _6 j# N: d4 ]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.
6 H- c: z& }5 F3 v% |' SDecision:
, A2 i6 i( ?) q9 w+ T; B6 g1 C3 S. `The mentioned note 1 shall be interpreted by replacing the first line by:
9 y$ s8 ^* w# v* B: \. j“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....”