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 DSH 297
; q7 c7 B1 ?- F6 t- @0 e: x6 j | Measuring Circuit Terminals (Amd 2)
8 O! A# M: C1 J+ Z | 5.1.5& P* K" V- @6 Z) [- Y6 i: s& E; A
| 61010-1(ed.1);am1;am2
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Standard:
# {3 @; z8 Z8 q- K% [IEC 61010-1:1990
! w8 |$ S; Q9 _/ e2 I* u$ N+A1:1992+A2:1995
5 ~0 P4 B( L2 ]Sub clause:* F6 }0 |7 }+ B- i3 q- W7 m" m F
5.1.5: B4 N9 c( z$ |) |, {
Sheet n. 297
- {7 g/ G, n; l( V tPage 1(1)
- ^/ n) O- J( x4 F- BSubject:
1 C. ]$ K x4 YMeasuring Circuit Terminals4 F- Y$ y( Q5 |5 w
(Amd. 2)" e1 `% ^- D0 _1 ^, O% A1 a$ h5 I- ^
Key words:$ N' w/ f6 K0 w
Terminals$ t. \# h w1 r3 Q$ l2 m
Marking
, }! T& c" `* y+ E; j! Y: ?/ JDecision taken by+ ]; A/ M1 ^, Y) N1 [0 n8 G6 J
ETF3 and confirmed- {1 n# ^& \( c' z# p9 g
by CTL at its 38th
* z3 G3 H i, U: O- }, P2 b" }+ Mmeeting, in Toronto+ H8 i d0 n6 i3 P1 l
Question:
' V& y, ~: `+ y0 y- o9 a/ ~1 xIs it acceptable for a measuring equipment to have its sensing terminals marked:
& o$ E3 R9 u8 z$ p“CAT II (600V)
2 C# M; q9 Z) y" G1 TCAT III (300V)”( q3 X9 A/ k4 Z2 l7 Y& D
Decision:
; r4 Q y' ^4 I( Y9 L) c2 g2 K7 PMarking with both categories with the relevant voltages as shown is acceptable." Y. h! n( D" R( b$ m% Q
Explanation:0 o. q- M# |7 h2 X0 |8 @7 t
The standard allows operation under different categories provided the isolation is suitable for2 o, `: r+ P* p ~, i ]0 m; D
the voltages concerned. In this case, it is possible to mark both categories since the3 q( K2 ]$ Z1 Z( i7 ?/ V( v
requirements for Cat II at 600V are the same as those for Cat III at 300V./ i8 n) P: `( d9 k) X- ?' v3 b6 ~
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发表于 2012-9-19 15:11
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