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标题: DSH 597 Verificaton of main contact position, position of the actuator [打印本页]
作者: 小米    时间: 2012-11-7 18:25
标题: DSH 597 Verificaton of main contact position, position of the actuator
DSH 597
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Verificaton of main contact position, position of the actuator
: {" C( P2 N5 L6 B* @& m& y		8.3.3.9# F) n7 o  ~/ n6 z0 r
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
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Standard(s): IEC60947-1, IEC60947-3 d, k  h0 E4 f' b) S
2
- x% o# R' E6 F8 o( DSub clause(s):; n& j! b$ L: v: I5 l& x/ [4 V
8.2.5.3 of IEC60947-1 and
1 F8 j8 P; a2 H8.3.3.9 of IEC60947-2
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Subject:
1 q4 q$ `; y$ E9 Q' g1 b' ~Verification of main contact: S* m8 u+ R( B$ h2 b) ~# I
position, position of the actuator) C. Q' H) M5 i2 ?& l
Key words:
2 S1 e4 X0 v0 c' d' w6 V/ e! M- suitable for isolation' j4 L" @8 ]) q6 r) d% m% k. |
- indication of contact
$ i" ?# Z5 L' O% z' gposition, E/ {8 Z- Q9 D% x! R' E
Decision approved by, m1 r" J$ U" b* m# @9 n
the 44th CTL Plenary
: _5 ~) j  e0 s/ m1 u+ L$ ameeting 2007+ [6 i$ }" Q3 a0 p  `; c
Question:
5 q2 `& a& g9 x# p! W' kVerification of the main contact position is conducted only on products suitable for isolation. This is an* o& u) j% F1 U6 ~
additional requirement to be verified.- c% P4 q+ c9 m( Y7 i. x1 R
Q1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is- x. H$ F6 j/ I: ]  H- _
neither consistent with the tripped nor with the open position markings as indicated on the product). Is this a
2 Z. |' R7 t6 |* ]) {/ {pass when tested according 8.2.5.3 of IEC60947-1?
$ E) A. G' x  ]0 {Q2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How' P# b* ?$ A. D3 `+ \/ \2 n
should section 7.1.6.1 (additional (constructional) requirements) be interpreted?5 L" x+ W- ~- X4 ~2 R) w# U
Proposal:
! @! Z, v; ~% u* }; W$ g+ KThere are two possibilities, depending on the features of the breaker:
! |( D# }9 a9 J; B. K8 ?+ l1) The indicator is the actuator, and it is the only position indicator, or
8 w3 w5 b! p7 \6 I  x( U2) There is an actuator that may show the operating position, but in addition there is a
8 m) H- t+ S6 {3 O: tseparate position indicator.
" ^- {  c' K/ M0 |( j$ zFor construction per item 1, this result is not acceptable7 m" `& l- C3 d7 n' M( [
For construction per item 2, the result described is acceptable if the separate position
! |, v/ s. X) e2 f- z1 Xindicator unambiguously shows the closed position, irrespective of the rest position of the
/ |5 q* d( p9 c  a- oactuator.
6 o# K' ?( b- y6 d% IRefer to IEC 60947-1, Clause 7.1.6.1
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