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

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DSH 597 2 W- c  V! P7 I: | 6 ^3 v" B+ r* ~% Y

Verificaton of main contact position, position of the actuator ) K' w. k( C8 A5 @

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 # f. O6 @( b  A. b  `' x2 K$ ?, Q2 e  F

Standard(s): IEC60947-1, IEC60947-
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3 e, C- n( p$ H0 c; [! hSub clause(s):
8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
DSH
  D4 ?7 _- v- A; V  P597
Subject:
6 e5 }6 P5 A5 z/ M- o0 I) LVerification of main contact
3 c- F4 u2 }8 B' K9 ?0 Eposition, position of the actuator
Key words:
3 \4 O3 l1 `1 a* @* ]. s9 R+ J$ D- suitable for isolation
- indication of contact
7 ~- {  C, @& t# n6 Nposition
Decision approved by
7 h) ]! }3 X" |$ P5 S; `the 44th CTL Plenary
0 y+ F) d$ E. }# l/ jmeeting 2007
Question:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
8 X5 ?, i- o# s* S& fadditional 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
3 t: C( e" z8 K0 v4 ~# d" P' W# fneither 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?
& C5 i' I% s% h5 ?% p/ i( WQ2: 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?
. h- i; v& M9 Q8 E/ F8 b# Y# r. ZProposal:
There 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
( P: k2 _& }. w, v3 |& tseparate 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
% a7 ?4 w3 l8 d- @: p/ U6 Q' oindicator unambiguously shows the closed position, irrespective of the rest position of the
actuator.
# }2 X9 u1 [9 S/ DRefer to IEC 60947-1, Clause 7.1.6.1
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