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| CAT III for mains circuits
! Y0 w1 D+ f2 ~' }9 f) Y( f | 6.7.2- k& `4 y/ f! \
| 61010-1(ed.2)
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Standard(s)- (year and edition):& l( \6 i. @, {5 h/ t% i; [& [ j
IEC 61010-1:2002 Ed.2; n* l: a, Q/ L4 u+ [) j* ]" a' u
Sub clause(s):! y* j. h7 s/ Z+ N) _
6.7.2) @1 h# D8 ~( s/ d0 A7 i( \8 Q& Y% u, Y
Sheet n°: 536
+ y9 e; r4 M0 e/ n: `2 ]Subject:
9 r+ o& [% m# H9 LCAT III for mains circuits& ^) }9 m' T! w* \4 X
Key words: ~0 Q7 K* L6 Z7 X; v4 i% V
Mains, CAT III2 D6 K9 t, R v
Decision taken at the 40th! W7 z6 P4 f6 ?3 o& A5 F
meeting 2003
" l9 \0 u9 X/ ~# x5 x0 |; mQuestion:' m5 s8 D7 P9 x0 L+ A+ L: R
Measuring equipment (not kWh-meter) that is permanently installed in the service equipment has a
$ Q: R, y$ D' E9 Tpower supply unit which is connected close to the incoming service and the kWh-meter. The device3 m Q+ C. l2 [5 g
sends information to the electrical company, utilizing the mains service and
2 y+ {- {1 V3 P7 iconnected close to it. This is to my knowledge a CAT III area.
6 P$ g$ k, S: Y! E0 b% nSince CAT III has been withdrawn for mains circuits (6.7.2), the requirement for a 300 V mains would
8 X( X* O6 B. i7 q5 h/ K$ A0 x4 gbe 3 mm air / 3-6 mm creepage / 2 224 Vrms Test voltage on the supply side, according to table 4 and 9.8 {; @5 w: n9 u6 R! i
Decision:& O E8 D( Y$ y: d0 h$ ]
In this case you can apply CAT III for measuring circuits.$ @; s2 u! {2 t Z
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发表于 2012-9-18 11:45
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