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( F U5 ]4 h& G( L" MStandard(s)-(year and edition):
) b0 `7 b# h8 a* _2 Y6 tIEC 61643-1, 2nd edition, 2005-03
/ i0 Z2 ]8 D0 `' o- pSub clause(s): 7.5 a) 7.5.4 a) + Q& t# v* {/ r) J% X' o
DSH- 6437 ?5 @" w% q t' a
Subject:
' @+ L' C2 z6 j. r2 W( ~Measured limiting voltage
- O$ Y% ?+ A. T2 A+ \+ tKey words:. w2 g! l1 V `
- measured limiting voltage
# t% [1 T5 n& m% B) t- protection level4 T1 h- b, j6 c' P9 {4 @/ c8 s
- energised testing' c7 F$ ?; R/ s1 y+ V
Approved by the 45th CTL plenary meeting 2008
5 A U; c# ^7 d4 s& t% ^Question:
, E8 b4 Q7 X* l. s* d3 VTesting of one port SPDs according to test class III (Type 3):% r4 \2 ~; W: ?' k! h, c+ ]
Should the test to measure the limiting voltage with the combination wave be performed with the SPD being energised at Uc or without energisation?, a5 Y8 R X: C3 a/ z6 L* V- A
Rationale:/ @" K' Z0 A& T5 T! a& z; ?) J
Clause 7.5 a) of the standard requires:
+ u/ g; O" w# ~3 l0 @All one-port SPDs shall be tested unenergized. …
1 {5 y" e6 k7 K& b! R# C# C! WClause 7.5.4 of the standard requires:# y3 Z+ Z/ j. z0 W: B' g
a) The combination wave will be applied to an energized SPD, with the mains voltage at Uc./ l) l# c* H6 G( e7 l. ^ x
As testing energised may give higher measurement results, the test should be performed energised
+ n6 w" Q+ l! L1 ~- `Decision:* U; L+ ?! h7 u
The test shall be performed with the SPD being energised at Uc.
: F: L$ t, N6 v6 g/ u1 Y/ X! U # c1 G# f& F+ x, X- G) O$ k) F9 L" i% ]
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发表于 2012-11-7 19:13
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