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" n) x7 d# P3 d& z | CAT III for mains circuits/ G1 u1 Y5 e* G. }+ i
| 6.7.2
+ q* C7 k8 s/ _9 I8 X& l& u( N | 61010-1(ed.2)
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$ m, ?% s- ]8 d/ l1 v, CStandard(s)- (year and edition):" Y; L, h* y" c3 J3 ?
IEC 61010-1:2002 Ed.2. C' w& M8 l8 O* i% U
Sub clause(s):
, r, i, D* y& ~/ `) l# q+ Q: n) R6.7.2
2 L t6 `; j' W9 O5 t/ q. F0 WSheet n°: 536
8 Q" t. m+ {7 @: I9 ]9 E: U; N; t; PSubject:
$ }% H. j' W0 w- q( {6 mCAT III for mains circuits* @$ g( F+ Z2 G
Key words:$ T, w( x# g$ t* U1 a
Mains, CAT III
) d! h9 n8 z. D7 iDecision taken at the 40th3 ?- m6 p; G7 x
meeting 2003
2 ]8 M' A" ]$ c( g' qQuestion:
, v' J( V' c8 i3 [* u: bMeasuring equipment (not kWh-meter) that is permanently installed in the service equipment has a
# A! J5 O8 S `$ j" {5 B# Cpower supply unit which is connected close to the incoming service and the kWh-meter. The device
* a! z* m- x$ S$ g5 x% u7 X! P! isends information to the electrical company, utilizing the mains service and: ~4 g R5 a c2 W1 M+ n
connected close to it. This is to my knowledge a CAT III area.: G# @# j7 o8 m! q9 o7 y
Since CAT III has been withdrawn for mains circuits (6.7.2), the requirement for a 300 V mains would
+ l5 B8 R1 X) D5 t6 b3 Kbe 3 mm air / 3-6 mm creepage / 2 224 Vrms Test voltage on the supply side, according to table 4 and 9.5 x7 s% J4 F3 c0 I) P/ k3 I2 `
Decision:
: D) c" c8 b0 P: G8 tIn this case you can apply CAT III for measuring circuits.
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发表于 2012-9-18 11:45
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