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Standard(s)-(year and edition):
# E3 `7 l* \/ L3 d& [IEC 61643-1, 2nd edition, 2005-03
7 h3 R# l$ @) Q1 e5 KSub clause(s): 7.5 a) 7.5.4 a)
& }; D) v+ J$ m; s* L/ @" jDSH- 643
; R1 P7 l% t2 z1 n& R+ r: U7 d5 JSubject:
" Z% `* i4 | N; }- B: _5 DMeasured limiting voltage* a; b9 o! V- n# o' `0 {
Key words:
6 n5 K, {; l6 ~3 a' B0 q- measured limiting voltage
0 x" _3 R& k, P- protection level* `* r; w+ ~) y* e2 J
- energised testing
! j8 I K; \, k3 ^6 w/ wApproved by the 45th CTL plenary meeting 2008
$ e$ G$ W1 R1 u/ F/ t" d. A4 t) KQuestion:3 j6 ]! ?; F+ ]8 J J0 {, F
Testing of one port SPDs according to test class III (Type 3):6 r. n3 I4 P- V
Should the test to measure the limiting voltage with the combination wave be performed with the SPD being energised at Uc or without energisation?. G0 n. @; [# |. M
Rationale:5 A. q& x0 }, x- A
Clause 7.5 a) of the standard requires:
' E# L5 I/ D6 q9 Z5 xAll one-port SPDs shall be tested unenergized. …+ n2 W8 e1 ?9 g& Y
Clause 7.5.4 of the standard requires:/ h/ {' B3 }! e- ?
a) The combination wave will be applied to an energized SPD, with the mains voltage at Uc.
9 y+ U, q+ F O" n7 w: q2 C$ g* eAs testing energised may give higher measurement results, the test should be performed energised9 `+ c$ t4 w$ d2 f( \' m6 G6 R
Decision:9 E, R0 H, ?5 O" C. k$ M3 K
The test shall be performed with the SPD being energised at Uc.
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发表于 2012-11-7 19:13
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