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标题: DSH 588 Verification of main contact position, position of the handle [打印本页]
作者: 小米    时间: 2012-11-7 18:30
标题: DSH 588 Verification of main contact position, position of the handle
DSH 588$ e, V3 O4 Q( n* L) T* g- E

- K# z7 r/ J$ r+ m& z( [		Verification of main contact position, position of the handle# W2 O" F4 N5 b9 {! w/ u
8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-2
8 n, X6 K0 y! q0 l& i		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)
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Standard(s): IEC60947-1, IEC60947-* J- J2 W$ S' S5 I& n5 C6 U# Q0 R0 z
2, IEC60947-3
% v. e& W) F! F# y1 q% ~Sub clause(s):  t( o* u& D3 ~2 g8 v! ?, J
8.2.5.3.2 of IEC60947-1 and
1 [) ]2 F$ o2 X9 c8.3.3.9 of IEC60947-2
6 A$ T6 A1 h( I6 Z. vSheet No.
, N" [0 g! D4 H; o+ NDSH 5882 }0 O. l" H+ P7 p% a
Subject:
0 |* s0 X, T( P$ F  pVerification of main contact
$ m! h, `! e. x6 R/ z" \8 Q4 D7 Aposition, position of the handle
$ Q; g4 K6 k* v( K) V) B7 f5 {7 TKey words:& e9 p  P- k8 [. _( ^/ @
- suitable for isolation/ `0 M+ |* d* Y: |8 t
- indication of contact
  o7 {% g' P9 t% I: s) Hposition
1 O; y/ l* ~) C9 `) N) cDecision approved
# _- j  k5 x. Qduring the CTL Plenary
: D' r  N2 ?9 @9 O. w5 ZMeeting 20064 a6 W. Y, m- ?% z2 `7 _* Y8 r
Question:
- S( m) H8 c! \% V4 t4 u* g6 fVerification of the main contact position is conducted only on products suitable for isolation. This is an
( c3 M( H# n+ J4 m' B# aadditional requirement to be verified. With respect to this test, the following two questions gave rise to( ^% r" L- e8 \- ?. h! j
discussions
- y% O# w) P) ?0 WQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which
5 @4 O) J( G+ c( y' ]( Jis not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of* R# [$ x+ d; k+ V! D" p- W
IEC60947-1?9 d. |) |% i% h/ d3 D/ ~2 E
Q2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how4 O" Z% d  W9 ?- O
should section 7.1.6.1 (additional constructional requirements) be interpreted?
( ^! Z) m5 q0 s2 V2 \% GDecision:6 w+ S: G+ l' p, B( P9 m
There are two possibilities, depending on the features of the MCCB:* j1 `; z' H" q
1) The indicator is the actuator, and it is the only position indicator, or6 Z8 [1 j# j7 M0 Q" Q
2) There is an actuator that may show the operating position, but in addition there is a
3 j6 Y0 I- p% v% {+ f* tseparate position indicator.
6 S& x2 A' Q% j; E/ P+ O$ FFor construction per item 1, this result is not acceptable
6 u- G( ^; J6 r6 q0 B6 M' B% H9 iFor construction per item 2, the result described is acceptable if the separate position! p8 [6 }6 e( w4 A- u$ R
indicator unambiguously shows the closed position, irrespective of the position of the
8 G$ O6 ]- z% \8 mactuator.# x3 @5 w: {5 W" H# o  w! ]
Refer to IEC 60947-1, Clause 7.1.6.1( t7 D) |- C& Q" `3 V3 A  [4 t

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