DSH 597 Verificaton of main contact position, position of the actuator

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DSH 597 8 T/ H3 N  i5 M& W" I! G; n) g1 L' X 0 ]# B  e4 u& V

Verificaton of main contact position, position of the actuator

8.3.3.9 8 M! F+ f' [/ w. |7 ]6 U6 {) X

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) & 60947-2(ed.4) & 60947-2(ed.4);am1 ! a0 {0 N- D, }0 k4 l

& k0 \3 R  M- M# X! g2 cStandard(s): IEC60947-1, IEC60947-
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Sub clause(s):
1 H$ g7 T/ w2 }) P7 ^6 X8.2.5.3 of IEC60947-1 and
0 L# K! S$ ~' P0 C8.3.3.9 of IEC60947-2
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7 F0 N" O* w5 M/ J597
Subject:
+ r3 K) \6 J* W4 W. ~; ~" sVerification of main contact
position, position of the actuator
Key words:
6 {/ e' S$ `  {2 h) E- suitable for isolation
- indication of contact
) Y+ {: }- V3 I! z- x! M% gposition
' T1 h3 W( V( V$ g$ @1 ?( ]; FDecision approved by
the 44th CTL Plenary
meeting 2007
3 m: Y; F0 g% A; ~8 E4 MQuestion:
% k$ {  Z7 l" a* B' t4 WVerification of the main contact position is conducted only on products suitable for isolation. This is an
5 |- t) M3 F! [" Eadditional requirement to be verified.
7 I3 p2 e* O& n7 CQ1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is
neither consistent with the tripped nor with the open position markings as indicated on the product). Is this a
, K3 L/ y; W, A& v4 _5 ?* lpass when tested according 8.2.5.3 of IEC60947-1?
0 H0 G0 X, n( R' J3 S. HQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How
, \, K7 T0 B5 m2 x2 ~/ h, f0 S- S( \should section 7.1.6.1 (additional (constructional) requirements) be interpreted?
4 S# q6 u# x* v2 i2 O' SProposal:
1 Y0 j# d- `6 J$ lThere are two possibilities, depending on the features of the breaker:
1) The indicator is the actuator, and it is the only position indicator, or
2) There is an actuator that may show the operating position, but in addition there is a
separate position indicator.
For construction per item 1, this result is not acceptable
For construction per item 2, the result described is acceptable if the separate position
) _+ n+ o. [# L2 [2 S7 s; Sindicator unambiguously shows the closed position, irrespective of the rest position of the
# G1 O2 G6 n% P7 Kactuator.
Refer to IEC 60947-1, Clause 7.1.6.1

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