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! N( }' H2 E& a& h! `/ b( `
 DSH 297
; i+ e U3 R% c: O5 j3 J5 o- u; P" c | Measuring Circuit Terminals (Amd 2)
! c/ C. }; w# G& V | 5.1.5
1 P5 Z* j' S c7 Z* `% x1 M | 61010-1(ed.1);am1;am2
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Standard:
. A/ V8 }) \; |7 v; v zIEC 61010-1:1990
5 P" k& A# C# B, `' b+A1:1992+A2:1995" }2 a+ p) w: ^& m7 f; b
Sub clause:
{+ Z( b$ s' K, A5.1.5& O' T9 Z* @) |
Sheet n. 2977 F2 R/ m$ |8 x( h- @
Page 1(1)% T& |- W5 P+ ]; ~' V; l# V! @
Subject:
x/ h0 \$ R9 K& d7 {Measuring Circuit Terminals1 e- H1 a5 T B3 ?0 {5 t& t
(Amd. 2)
& b5 i" c7 Q* u" \+ J: B& eKey words:
7 A% r) k( b/ r7 @% x5 }" ?7 jTerminals
6 Y# k" ?' L$ w8 i1 f) _2 H0 CMarking
( k$ v. n9 x/ Z5 kDecision taken by
' t. v- U* `; ]3 w9 z( T' j: lETF3 and confirmed
3 B0 h" H$ b% V, D5 U& c2 y7 Y, Cby CTL at its 38th$ N2 x# l1 i% p K
meeting, in Toronto* M* T" ~! J/ N$ E: j# P
Question:
0 l. P5 c/ j$ u! l4 zIs it acceptable for a measuring equipment to have its sensing terminals marked:* ?) ^; H' [" D7 U
“CAT II (600V)( w5 Y! c X8 Q; z( t
CAT III (300V)”
- ]9 {) X2 v" \5 M* M5 G/ i( |7 o; CDecision:
8 K' \/ j1 j7 X# yMarking with both categories with the relevant voltages as shown is acceptable.( Q3 K2 Y' h& I ~3 R y/ m
Explanation:% B+ n. _5 u4 @$ n
The standard allows operation under different categories provided the isolation is suitable for9 X! J4 k! v2 C, H! {3 f
the voltages concerned. In this case, it is possible to mark both categories since the
0 _8 Y) B0 L. Krequirements for Cat II at 600V are the same as those for Cat III at 300V.& w( x* a4 ~6 R$ u. _, o
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发表于 2012-9-19 15:11
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