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

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DSH 597 . d! k/ b3 w6 z$ t, N  g

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 % v/ m6 l6 i) J% X3 N: T# _$ h

Standard(s): IEC60947-1, IEC60947-
2
Sub clause(s):
8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
. Y. L' l8 J4 J# ]- VDSH
597
Subject:
Verification of main contact
  E; K/ \6 R  b* f* h! y3 Gposition, position of the actuator
Key words:
- suitable for isolation
- indication of contact
6 t' G( I# L/ F8 Sposition
Decision approved by
the 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.
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
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
" z& j( ^7 x4 [& P" y3 t% m" T5 Fshould section 7.1.6.1 (additional (constructional) requirements) be interpreted?
Proposal:
There are two possibilities, depending on the features of the breaker:
% ]$ P( o7 U$ v' v$ Z1) 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.
For construction per item 1, this result is not acceptable
For construction per item 2, the result described is acceptable if the separate position
) a( z2 b  p; _% Mindicator unambiguously shows the closed position, irrespective of the rest position of the
$ N% I3 M- E( ]) y8 y+ ?+ o  Yactuator.
Refer to IEC 60947-1, Clause 7.1.6.1
! U. O; ^: t) s
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