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 DSH 297
6 t7 [# T) C* [* z. d* @& _ F | Measuring Circuit Terminals (Amd 2)
* V' S4 H! \5 A2 k | 5.1.5
9 }0 j; B' M) M0 W5 H9 F& E | 61010-1(ed.1);am1;am2
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* @8 t, a. E; ~+ A1 `2 ]( d7 X' IStandard:
3 j$ Y& U3 I4 z( EIEC 61010-1:1990
9 W8 ]/ W" F# D+ E; m' s+A1:1992+A2:1995
; [0 Y& C, V/ P% uSub clause:8 s$ V% e/ o5 s
5.1.5
+ m: |4 u9 {# ?5 N% i% f+ r7 [5 n' SSheet n. 297% \" f' g; B l5 D
Page 1(1)" w3 h* u# X" e# q1 Q5 i
Subject:
1 ^* h, c8 s% AMeasuring Circuit Terminals# D+ t3 u2 n! U2 N
(Amd. 2)0 }. S# l& E) e2 M9 I& _( M
Key words:2 @1 x: ?: a: b+ }2 r2 D
Terminals: V0 O7 u5 F" Z; G& G# H8 {" y
Marking5 k5 w$ U, ]& s) j1 u
Decision taken by
. X2 n! k3 F2 u3 Y; @" uETF3 and confirmed$ }! e& ]$ S' v$ t4 `3 {' F* H
by CTL at its 38th& B% s7 m- C# ?
meeting, in Toronto
; U" L9 [/ ] r: Y8 `8 v6 CQuestion:
' U- i( h6 [* }$ zIs it acceptable for a measuring equipment to have its sensing terminals marked:
; r& P- F% R: I5 U* C) [“CAT II (600V)9 R1 F+ q! x; H
CAT III (300V)”0 F8 G, T% g) S2 ?2 b
Decision:3 N" a: [7 e; q, e
Marking with both categories with the relevant voltages as shown is acceptable.2 d- F4 e0 v; m7 x* G9 ~
Explanation:+ z2 q, O p- `2 M- z& l
The standard allows operation under different categories provided the isolation is suitable for, G3 M: a+ P" x9 T# s7 L
the voltages concerned. In this case, it is possible to mark both categories since the
4 ^9 u* h0 M/ Y0 [requirements for Cat II at 600V are the same as those for Cat III at 300V.
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