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

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DSH 597 : Q) Z0 T9 N# u1 Y' z7 l9 N/ K3 t

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

% O  n5 I) {- `' y) x1 t3 f, r$ ]6 kStandard(s): IEC60947-1, IEC60947-
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Sub clause(s):
2 X! i& M6 E4 y( v  _( {* ~8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
DSH
8 B. X% @, F  h; X8 h) _597
" o' K  d* \! f% a+ z6 oSubject:
Verification of main contact
4 a: ?7 ?- l( B  ]position, position of the actuator
Key words:
3 K: i5 L$ P- o5 ]  q* d- suitable for isolation
- indication of contact
; h# Z/ E2 E& G) b. Bposition
3 w& x' _* v& V+ V9 ~& T+ o: E  EDecision approved by
the 44th CTL Plenary
, H1 k/ ]+ y9 F: ~& H/ ]0 G1 bmeeting 2007
Question:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
6 g0 p. `# P2 Q/ Madditional requirement to be verified.
- G! r1 G* G) b3 GQ1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is
2 j7 q3 k7 \) `9 M' ?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?
1 M' \6 {; N; O$ e3 b+ IQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How
5 D( \2 D' M7 M" E( x  A7 ashould section 7.1.6.1 (additional (constructional) requirements) be interpreted?
  Z, B& [$ D7 u0 |9 H9 gProposal:
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
6 Y( m8 H( C2 j1 A% Y2) There is an actuator that may show the operating position, but in addition there is a
! M/ ^! A2 [' [9 c3 o$ xseparate position indicator.
  C3 c( `3 [6 {9 Y- ~0 j! L6 T. k; OFor construction per item 1, this result is not acceptable
For construction per item 2, the result described is acceptable if the separate position
4 [# v' N3 I# d$ K9 q2 B' j6 mindicator unambiguously shows the closed position, irrespective of the rest position of the
" m: Q6 |, I1 q8 H# h& w/ M2 yactuator.
Refer to IEC 60947-1, Clause 7.1.6.1
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