DSH 297 Measuring Circuit Terminals (Amd 2)

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DSH 297

Measuring Circuit Terminals (Amd 2)

5.1.5

61010-1(ed.1);am1;am2 ( P% s1 n0 J9 w( G+ q, v

3 s6 I) @9 |7 f- t1 ZStandard:
7 U# R) J; U9 f0 J2 HIEC 61010-1:1990
+A1:1992+A2:1995
% m$ u/ N( Y& S3 }$ b* O3 Y9 O; HSub clause:
5.1.5
) P6 [5 _+ m* ]5 C- `Sheet n. 297
Page 1(1)
5 B3 u* Y+ f( [& O5 @% vSubject:
Measuring Circuit Terminals
" X, i' M' I7 z8 q8 E- E(Amd. 2)
Key words:
Terminals
Marking
$ f: Z$ V, ]$ ?0 k" mDecision taken by
# ~5 w) @/ T3 C- y; [% BETF3 and confirmed
by CTL at its 38th
meeting, in Toronto
Question:
  H# H8 y1 Y: o6 r! ZIs it acceptable for a measuring equipment to have its sensing terminals marked:
“CAT II (600V)
+ e& }( b8 \* A4 J$ Y- mCAT III (300V)”
Decision:
+ F6 g' M) c1 U0 t& C( p  aMarking with both categories with the relevant voltages as shown is acceptable.
Explanation:
The standard allows operation under different categories provided the isolation is suitable for
the voltages concerned. In this case, it is possible to mark both categories since the
8 ~7 Y) [8 F5 h6 frequirements for Cat II at 600V are the same as those for Cat III at 300V.
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