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

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DSH 597

Verificaton of main contact position, position of the actuator % f7 U1 A$ ~8 E. B4 v# p, ?+ s0 v

8.3.3.9

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

+ U8 B! n0 t( l9 _Standard(s): IEC60947-1, IEC60947-
2
Sub clause(s):
3 E3 W( l9 e3 Z" t6 {/ [8.2.5.3 of IEC60947-1 and
" C" v0 y* _; q1 v( ?" G; N( q. A8.3.3.9 of IEC60947-2
" L: d, |9 Y" A' Q( M# V# s9 {- fDSH
( t8 Q/ J8 t1 H' @597
Subject:
& N2 T# {' {! y- ?( `+ u* DVerification of main contact
! q% o! N9 j2 @& @7 vposition, position of the actuator
Key words:
- suitable for isolation
- indication of contact
- Z- K2 i$ X/ Y6 V5 Wposition
" o# m% r3 Q# i+ e3 u: v6 `# M& v+ q2 ]Decision approved by
the 44th CTL Plenary
  q: q5 ?1 @8 X  ^9 O# cmeeting 2007
+ x' ?2 o& ?' d6 U) U& A3 {1 GQuestion:
3 }! K9 D; b- O+ nVerification of the main contact position is conducted only on products suitable for isolation. This is an
additional requirement to be verified.
Q1: 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
2 Z6 I: Q, }3 e6 m" i& Vpass when tested according 8.2.5.3 of IEC60947-1?
, I% N/ m9 J5 d- q/ D# L( gQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How
should section 7.1.6.1 (additional (constructional) requirements) be interpreted?
, x  F, a7 F6 d! CProposal:
There are two possibilities, depending on the features of the breaker:
' u! @; F. t  l+ u8 Q2 ~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
. n7 S* g' v" m- gseparate position indicator.
For construction per item 1, this result is not acceptable
# Q$ o2 L7 y+ g5 MFor construction per item 2, the result described is acceptable if the separate position
' l" r* B$ h/ h8 @& V' @7 V3 H1 P: u* Rindicator unambiguously shows the closed position, irrespective of the rest position of the
* }3 R& D; v) Kactuator.
/ a2 L1 W$ C8 g( ERefer to IEC 60947-1, Clause 7.1.6.1