DSH 643 Measured limiting voltage

小米

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

DSH 643

Measured limiting voltage ( P) X1 ?& C% |  j/ w" K

7.5 a), 7.5.4 a) 6 @5 r" `! C" Z; q3 [

61643-1(ed.2) & Q! C- H3 j; ?0 W) c$ `

& x/ p1 [5 w- z7 V) jStandard(s)-(year and edition):
# e0 y) i: n. X: P0 _  L% KIEC 61643-1, 2nd edition, 2005-03
1 j' n# ~- v% b6 ]. d4 z- sSub clause(s): 7.5 a)  7.5.4 a)
DSH- 643
Subject:
Measured limiting voltage
5 ^) `0 `! x4 k- P1 Z7 iKey words:
- measured limiting voltage
, @0 `+ n" V/ i- U+ e+ _0 |+ e$ a6 [. d- protection level
: a0 ?7 b4 v: g2 s1 R( R! `; C: m  R3 l- energised testing
Approved by the 45th CTL plenary meeting 2008
Question:
+ Z' y& `- k/ J4 @4 WTesting of one port SPDs according to test class III (Type 3):
; G3 y- S6 ~1 e, J8 ]" o# Y- r. cShould the test to measure the limiting voltage with the combination wave be performed with the SPD being energised at Uc or without energisation?
2 y( g% \# F9 x3 q& p: d# |Rationale:
Clause 7.5 a) of the standard requires:
8 g. N$ I1 _" o1 t1 t9 s% f/ _/ UAll one-port SPDs shall be tested unenergized. …
Clause 7.5.4 of the standard requires:
a) The combination wave will be applied to an energized SPD, with the mains voltage at Uc.
As testing energised may give higher measurement results, the test should be performed energised
) @3 o9 D: y; U8 PDecision:
- r# r$ s6 V+ E9 b$ E! |3 ?) NThe test shall be performed with the SPD being energised at Uc.