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

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DSH 597 / G- y$ I4 v- w9 P5 H% R* N

Verificaton of main contact position, position of the actuator

8.3.3.9 " h+ ?6 O; P  l- a' V

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 $ h3 o  N1 U! ?& f$ G" ]

8 X/ e1 L7 c+ ^1 J7 m8 z' U* x" U) k; _Standard(s): IEC60947-1, IEC60947-
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Sub clause(s):
8.2.5.3 of IEC60947-1 and
8.3.3.9 of IEC60947-2
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  I$ X: e+ u7 u+ }# ?8 z3 [597
& b! }4 Q  h. }  A1 {  A0 ~. k1 p" nSubject:
Verification of main contact
5 [2 l+ R; s# ]3 q+ [  @4 Aposition, position of the actuator
Key words:
; {5 x7 T9 K3 o- suitable for isolation
- indication of contact
5 ~8 Q- z" A- L7 d' q3 iposition
2 G7 ?# X/ m" t' B8 \Decision approved by
- n: h8 ^+ j( i6 K1 Ythe 44th CTL Plenary
# [; k4 e* X: _7 F+ cmeeting 2007
Question:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
+ N) T" i  g3 H$ v, h, fadditional requirement to be verified.
# i: R& E1 C9 u! I* O" nQ1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is
" B/ i) l/ X9 [* y& G0 P" q3 m, Pneither consistent with the tripped nor with the open position markings as indicated on the product). Is this a
$ ^' E/ R( b$ Xpass 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
; ?0 F* i! x; R; J" ^should section 7.1.6.1 (additional (constructional) requirements) be interpreted?
Proposal:
6 x0 w9 O8 [) \+ ~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
/ c/ I& X% y8 q2) 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
. z7 w  [: t4 JFor 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
actuator.
8 Z( q; X2 u# LRefer to IEC 60947-1, Clause 7.1.6.1
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