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| DSH 588
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) C+ q3 `7 J$ F | Verification of main contact position, position of the handle
5 b" p) W3 k1 R) Z8 C1 \ | 8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-2/ F8 F7 u9 \ e- b) W$ i
| 60947-1(ed.1);am1 & 60947-1(ed.2) & 60947-1(ed.2);am1;am2 & 60947-1(ed.3) & 60947-1(ed.3);am1;am2 & 60947-1(ed.3);am2 & 60947-1(ed.4) & 60947-1(ed.5) & 60947-1(ed.5);am1 & 60947-2(ed.1);am1 & 60947-2(ed.2) & 60947-2(ed.2);am1;am2 & 60947-2(ed.3)
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. [9 n7 L! U* H, f( v0 z8 c! A$ @: [Standard(s): IEC60947-1, IEC60947-) s, v. k% y1 C" Y; ^6 u
2, IEC60947-3" Y3 o. k k( o8 c t, f! e
Sub clause(s):
1 o0 Y, V# G# p7 }) z- [8.2.5.3.2 of IEC60947-1 and
; h/ t, D" m. U0 s. F% A0 A4 ?8.3.3.9 of IEC60947-22 r. v7 V# m( G% ]# G
Sheet No.7 y2 U: H3 t2 {' x) X5 B+ E
DSH 5882 y6 x0 o& |, T( P' F$ d
Subject:
" ?5 E$ A# a. ]3 e( Q6 _Verification of main contact
8 B& C: Y r' u8 V1 V7 }, a$ lposition, position of the handle/ k+ K: A$ X+ m9 E- x2 P# [
Key words:
6 N5 O3 Z2 Q: X% c0 C- suitable for isolation, R z2 l: C) C0 n, U' ?5 Q
- indication of contact
8 s' u, H& @1 A- _position
Z( n- Q" D5 U# O% z: a2 _Decision approved3 Z" a( }' I7 g: e2 Z
during the CTL Plenary
% m* Y4 E9 ^8 ]# d3 kMeeting 2006
3 ]( m4 a, i: `7 k9 a' |) iQuestion:& ]# _4 H/ U! P$ S* f, F
Verification of the main contact position is conducted only on products suitable for isolation. This is an
- n' y- N3 t I6 j. q0 e( m: Y; Eadditional requirement to be verified. With respect to this test, the following two questions gave rise to2 |( @5 _5 b& ` l; v4 a
discussions
/ p8 ~7 ?, R7 Q) U! AQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which
& O7 g& J3 a% D: ~1 M- i# C3 ]3 qis not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of! u3 D. t, w0 {$ H/ p) x* }8 |
IEC60947-1?
* \! T& O& \' R J) @2 i# XQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how
1 ]% t$ T% i! H* B% q q1 Ushould section 7.1.6.1 (additional constructional requirements) be interpreted?$ E+ j+ N. T1 J% n& Z! @
Decision:
d- x1 @4 D4 v0 H& AThere are two possibilities, depending on the features of the MCCB:! T8 p( [# v8 y8 n' A, c7 }+ D
1) The indicator is the actuator, and it is the only position indicator, or
+ v$ w0 |. Y2 [6 f1 w3 _2) There is an actuator that may show the operating position, but in addition there is a4 y8 ]0 ~5 c& J+ u2 z
separate position indicator.
) R) q0 E4 \4 `For construction per item 1, this result is not acceptable4 W& {; X1 V, A* `# j1 }- e
For construction per item 2, the result described is acceptable if the separate position% E2 }7 |# N/ ~$ }; ?) M
indicator unambiguously shows the closed position, irrespective of the position of the
x$ _8 E+ y& |- [actuator.
+ M9 G6 F) T/ O3 i- b* b) fRefer to IEC 60947-1, Clause 7.1.6.1+ J0 h3 Q1 n+ s/ T/ S
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