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

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DSH 597 ) j) h' f7 I2 ?& P# n$ K9 \

Verificaton of main contact position, position of the actuator . v$ a  b5 n" o1 ^" N7 P; M

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

. X/ G; W2 ?/ A( qStandard(s): IEC60947-1, IEC60947-
2
Sub clause(s):
& Q0 z: O/ W. ^9 e8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
$ Q) T. ^0 I: Q6 w8 d6 ]DSH
597
8 ]8 L6 {& t* S6 v. T7 g$ _Subject:
7 c# P. r& }) e" L( UVerification of main contact
position, position of the actuator
Key words:
+ M* N/ _: N# Z7 K- suitable for isolation
- indication of contact
7 _9 P+ x6 x! d/ J4 }position
Decision approved by
the 44th CTL Plenary
meeting 2007
, n, K8 _( ^; I9 _3 N& RQuestion:
. H/ L$ U! `* P& I9 z$ t% q9 UVerification of the main contact position is conducted only on products suitable for isolation. This is an
+ u/ j4 V$ _& ]0 O) jadditional requirement to be verified.
/ C+ Q3 G$ k1 J) OQ1: 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
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
8 a$ u8 H% Z: t3 E. v: G/ fshould section 7.1.6.1 (additional (constructional) requirements) be interpreted?
Proposal:
! }1 T+ `1 r* Q  W% M$ TThere are two possibilities, depending on the features of the breaker:
6 n4 r1 o" N  O! R- W) S1) The indicator is the actuator, and it is the only position indicator, or
2 ?% p; ]' ^; ~: Z, d6 r4 {0 }2) There is an actuator that may show the operating position, but in addition there is a
separate position indicator.
3 r0 S# N# m0 k" J! BFor construction per item 1, this result is not acceptable
For construction per item 2, the result described is acceptable if the separate position
: v; X/ r! d! Lindicator unambiguously shows the closed position, irrespective of the rest position of the
1 k8 m9 ~+ g0 v- W3 R) }( Xactuator.
  _5 p* G5 w2 u+ [- z1 l$ gRefer to IEC 60947-1, Clause 7.1.6.1

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8 x9 [! e; _$ ~, r; ^5 a