|
|
& \7 `: A9 r% s. D2 G
4 K& D2 g, u1 V( |* V5 O | CAT III for mains circuits
0 @+ N9 p) @/ j {6 V; D | 6.7.27 p3 p7 V- ]1 i6 r
| 61010-1(ed.2)) A0 r7 n0 O' ^* Q2 R2 K. K
|
1 J" w% z% V5 T- Y, T# u5 P% h9 u" I2 D" L5 k3 g. T9 E/ d
Standard(s)- (year and edition):* \. B. x( h0 u
IEC 61010-1:2002 Ed.28 r1 e. B4 T l4 u
Sub clause(s):
/ p) W+ D! |$ j5 {$ w3 i: U. M7 I6.7.2; z* V- i" Y1 G
Sheet n°: 536. i P7 W% J# \0 V. u# W! x" B, i
Subject:
& l9 }9 m6 t$ [9 N$ S4 ?CAT III for mains circuits0 [/ A; ]% ]% d- `( k, ]8 y
Key words:7 |" {. V! C, n& |/ u5 K
Mains, CAT III6 T+ |$ P0 i% _2 r% W8 n
Decision taken at the 40th' `. u6 p3 f- [9 \
meeting 2003
8 Y6 q: y; h- o" [: ?; lQuestion:
5 j/ }% c+ M1 IMeasuring equipment (not kWh-meter) that is permanently installed in the service equipment has a
+ K* a7 E+ S9 J- q/ y4 Spower supply unit which is connected close to the incoming service and the kWh-meter. The device
2 ~+ Z. ]/ o2 N2 Usends information to the electrical company, utilizing the mains service and
: W+ b. Z) q# ~" w) _2 l( Cconnected close to it. This is to my knowledge a CAT III area.
9 P( T1 x7 E6 n( {Since CAT III has been withdrawn for mains circuits (6.7.2), the requirement for a 300 V mains would
+ V* j( }9 \! ?be 3 mm air / 3-6 mm creepage / 2 224 Vrms Test voltage on the supply side, according to table 4 and 9.
7 a$ B9 i) ^( D. YDecision:/ F1 O0 i8 v# I7 V/ d- s
In this case you can apply CAT III for measuring circuits.4 r& ^& T M! p6 a
3 D; _) Y1 a+ v! t& I
/ }! G4 Z1 ^ P/ B1 _
4 }4 m& k6 E& m
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看，没有账号？注册安规
x
|
/1 
|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
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡