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1 J6 D; ], j* C, o; e6 k9 g
, e G& t7 S% x | Measuring Circuit Terminals (Amd 2)
& S/ k9 m. w' ?8 Y% H5 c4 X9 j | 5.1.51 Q! M, s6 X, b) A
| 61010-1(ed.1);am1;am28 S! G" N' |0 h
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5 a0 [- j$ I4 z) B
) V" I$ x% j7 ^, R: aStandard:
5 @) ?9 Y! B$ i( u0 ?- [/ W& XIEC 61010-1:1990
9 f/ l8 Y5 p$ p# A- `0 W) z+A1:1992+A2:1995; W, ^) y L. [$ a2 L+ k
Sub clause:8 {; I' l2 @, S. u* N! H
5.1.5% y: @. s9 p1 m- _7 n; B* F8 s( Y" o, r
Sheet n. 297# k5 X7 I8 A7 J- L
Page 1(1)* ?7 U# @. B% _3 i8 I/ t* ~
Subject:+ t Z( m# G" s9 _" _+ g
Measuring Circuit Terminals
: u% j* R- z- }8 C) \(Amd. 2)
% i: ?5 j0 X6 L" m/ |Key words:
+ W8 ^4 R/ M) @/ PTerminals
$ o2 a/ h, Z- C* o4 k( G7 M2 {Marking
! o$ P e) Q7 y5 S, JDecision taken by" o% Y1 s3 B3 U* b0 m$ I+ u5 p
ETF3 and confirmed
/ ?2 B8 V2 T$ O! h7 d: k: xby CTL at its 38th+ L. y" J; X x5 Z: j0 ]
meeting, in Toronto9 h8 ` }: w- g5 H: y! C% y" z
Question:
]! Y! w! y# k& R0 y+ YIs it acceptable for a measuring equipment to have its sensing terminals marked:
9 R3 f; j) ^. [$ B8 j6 j6 o“CAT II (600V)
: ^" ~/ a- V! }( ?/ x1 WCAT III (300V)”
) a3 Q+ b. m7 KDecision:
% G; y7 Z2 Y5 u- `4 I/ p/ p# WMarking with both categories with the relevant voltages as shown is acceptable.
0 ]! m& T& H" G7 V: k1 l* vExplanation:- O7 J6 `* m; `* E: L8 D+ j
The standard allows operation under different categories provided the isolation is suitable for
$ O0 i& s6 _; t# T% Sthe voltages concerned. In this case, it is possible to mark both categories since the
2 s$ w: Y% W- y8 {requirements for Cat II at 600V are the same as those for Cat III at 300V.0 l" P+ H6 `+ F0 I& W/ P
$ P8 s' F. Q6 f9 X5 o: g# a
9 a0 ?7 r% Q$ I$ J( T. T: P# f' H5 e0 k5 D1 V: D3 ]$ j
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发表于 2012-9-19 15:11
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