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| Measuring Circuit Terminals (Amd 2)8 D1 r) V/ ^5 V; K1 Y: C5 p+ P
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| 61010-1(ed.1);am1;am26 J7 U2 J( ^/ m
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Standard:; r( ~- J, Q7 f- l) I
IEC 61010-1:19900 v7 v+ d0 t* V8 ]" i% ?( I* Q
+A1:1992+A2:1995
8 b3 Z. a, l; J) f3 |Sub clause:
$ q! _6 L5 R C( j5.1.5
! M' s* F5 T) }+ Y1 E1 DSheet n. 297+ K! N$ x0 ^) S6 H
Page 1(1)8 w; G( r. j3 z+ g5 F5 v
Subject:
' b: O& R# E# f$ [0 G. DMeasuring Circuit Terminals
3 M4 M" P/ L3 d& B9 t(Amd. 2) w* f$ _( g1 `0 k; p' ?! z) [
Key words:
- \3 _; L, a- }; o* y3 ATerminals
9 C. B3 t7 p9 h# r! ^" F$ {Marking' I6 H. ]' c) O1 ~& {0 u/ o
Decision taken by
* z; W9 M3 E. E9 QETF3 and confirmed
% ?/ Y, t3 B. ~by CTL at its 38th1 [* b# q/ h, Q W" F3 A1 L
meeting, in Toronto$ K- W: x1 E' T1 h
Question:
2 @5 R7 L+ { X* k. H+ `5 N7 JIs it acceptable for a measuring equipment to have its sensing terminals marked:
2 H4 ^$ h& n- l. x“CAT II (600V)# o0 I4 f! u0 {: y) o$ W4 p8 Z$ C! `
CAT III (300V)”
/ {# ^# Y9 U) k* I( QDecision:, v! ^' M* r3 j& }' Z" \: Q
Marking with both categories with the relevant voltages as shown is acceptable.
8 c, c) H: W7 {: {, a) [$ \Explanation:, N' d d! v$ F" W" S
The standard allows operation under different categories provided the isolation is suitable for7 D: Y$ m9 P& V+ O& x7 r, p/ t
the voltages concerned. In this case, it is possible to mark both categories since the
% J- t0 p2 q. j( q* [requirements for Cat II at 600V are the same as those for Cat III at 300V.
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