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

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DSH 597 : B% K/ @" k1 ]1 r; t1 j* W- [

Verificaton of main contact position, position of the actuator

8.3.3.9 & A3 ?! N1 S; [. x; T! u4 _1 {+ 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 7 Y- f; A. e7 g" F* I6 S5 ?/ U

Standard(s): IEC60947-1, IEC60947-
7 H2 g/ d/ F/ h+ M. _2
Sub clause(s):
8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
, F" z% Z/ g% QDSH
597
# V$ ]$ C( O$ [7 |& b7 XSubject:
( D: i: b) v, L; d. {' a! oVerification of main contact
position, position of the actuator
) A2 e2 a6 d% ~& D1 nKey words:
- suitable for isolation
' _. I1 @  {7 K9 f  M* ?- indication of contact
position
Decision approved by
# o( V3 d) S% }+ i/ R* F! a& a- I! vthe 44th CTL Plenary
meeting 2007
Question:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
additional requirement to be verified.
, Z! R# a; v- s) iQ1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is
1 }% ^+ h+ x) R, Q8 ]7 Yneither consistent with the tripped nor with the open position markings as indicated on the product). Is this a
pass when tested according 8.2.5.3 of IEC60947-1?
Q2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How
* ^2 Z* \/ Y( f( D) T0 Ishould section 7.1.6.1 (additional (constructional) requirements) be interpreted?
Proposal:
There are two possibilities, depending on the features of the breaker:
/ Z+ e! |4 Q8 y3 D% q/ |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.
( D! s, u! i! ?6 W, RFor construction per item 1, this result is not acceptable
! ]) b/ \8 b7 {, l! mFor construction per item 2, the result described is acceptable if the separate position
indicator unambiguously shows the closed position, irrespective of the rest position of the
0 x; p7 d$ Y  A% C1 h4 r$ cactuator.
, I0 {3 Y; J1 s' }6 {Refer to IEC 60947-1, Clause 7.1.6.1
: V5 B8 b5 |* P" P2 L, C! n