DSH 443 Impulse voltage test T2.3

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DSH 443   K& c0 v6 j; \: w' o! ~5 E8 w

Impulse voltage test T2.3

Note 1 of table 5 % y  ?8 O& G# m* |( k% [& y

61543(ed.1)

Question:
, s! _+ p; q. D% M9 A/ E& IIn 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:
1 b" h4 W* b$ Q/ f3 Z& Z. L" p$ T“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....”

5 J' `# g0 c5 z4 C. `$ A# U9 |