|
|
5 y! Z' X I/ C! `" s" a1 ~1 L
- T# H& t5 K4 l; P$ M# N$ h$ C6 T9 O! ? | CAT III for mains circuits; V0 C- x# q2 e" u5 Y, f7 E [- v
| 6.7.2! y; i4 R4 `3 Y; F( ^9 S% p
| 61010-1(ed.2)
/ [% Q6 g, @: I$ t |
5 v2 Z$ i1 ]3 o( ]& w. @. R
9 I% z! v) Z1 |/ b4 k7 j. GStandard(s)- (year and edition): Z& @" q& s4 P
IEC 61010-1:2002 Ed.2
. E: L8 m# }) W0 R7 E+ i1 W5 y( W [Sub clause(s):
! j" R) g1 E1 E2 X6.7.23 T# V/ S# U6 ^
Sheet n°: 536
+ @' g& N' q2 kSubject:' p0 c6 U. d" f9 Z3 ]% K& L
CAT III for mains circuits
$ t# c, x0 T MKey words:$ | O9 @9 `, @# c
Mains, CAT III7 G ?5 }) s: z* Y6 @9 X
Decision taken at the 40th) E r" R S/ v- \
meeting 2003
$ e0 }: j6 O% J. wQuestion:; @4 o% @4 V ^0 U
Measuring equipment (not kWh-meter) that is permanently installed in the service equipment has a
5 u+ @8 ?% Z+ Q8 P7 ?/ rpower supply unit which is connected close to the incoming service and the kWh-meter. The device
- |, P/ I: N3 L5 k+ d; d2 ]; s7 o5 Wsends information to the electrical company, utilizing the mains service and
! K' G4 p9 I+ Aconnected close to it. This is to my knowledge a CAT III area.
4 P) [' ^( e$ J6 y% dSince CAT III has been withdrawn for mains circuits (6.7.2), the requirement for a 300 V mains would
, a/ [5 T8 t! ~) |be 3 mm air / 3-6 mm creepage / 2 224 Vrms Test voltage on the supply side, according to table 4 and 9., g! H& h$ m% U
Decision:1 j! h" `1 Y7 a. N$ ~5 G5 v5 `
In this case you can apply CAT III for measuring circuits.
l V: z6 j/ R0 Q. n. R) J& g( ?0 V8 J- z* D/ c+ ?
& {2 v6 H( ~! s7 W' j/ \' G& G# ]( G
+ Y2 O' u& c7 I0 X; o! o6 V4 H
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有帐号？注册安规
x
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2012-9-18 11:45
收藏
分享
好帖
鸡蛋
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡