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

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DSH 597 . i* Q# ~" v+ Y

Verificaton of main contact position, position of the actuator

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 2 W: c9 @9 \- Y+ n- G

! A. X' ]0 b/ nStandard(s): IEC60947-1, IEC60947-
2
7 Y3 g# S3 f8 [1 u" o# a( O2 ~Sub clause(s):
8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
DSH
597
# b9 ^1 }3 c# |8 W- d$ W3 D5 FSubject:
Verification of main contact
6 e) X( P2 j5 m7 a: Tposition, position of the actuator
Key words:
0 x/ \  T! J: e$ _9 W% R5 |- suitable for isolation
- indication of contact
2 {4 h4 x2 B# t8 H( M6 eposition
Decision approved by
( ^6 s, i" h9 q5 \* S7 Ythe 44th CTL Plenary
meeting 2007
Question:
* m& g3 k5 {0 w( T. @Verification of the main contact position is conducted only on products suitable for isolation. This is an
3 D; S3 i1 g, g/ X7 W% Jadditional 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
/ Y+ A' [( e+ g( C3 V" ~neither 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
- Z6 n+ d' ~% }* p0 ^/ z; Bshould section 7.1.6.1 (additional (constructional) requirements) be interpreted?
  d3 p9 C/ I  h" O. e2 yProposal:
* k9 ]# D$ Z: l* h. zThere 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
- @9 Z5 L) K1 Q" Vseparate position indicator.
; ?. x$ B* u- N% ~6 N( D( n3 a: |For construction per item 1, this result is not acceptable
3 X. |" X, r, G! q5 aFor 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
4 |( X1 G( g+ k: D8 w. ?actuator.
6 k$ Q1 S6 d' g' xRefer to IEC 60947-1, Clause 7.1.6.1

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