DSH 588 Verification of main contact position, position of the handle

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DSH 588 / G& B1 r8 M7 O3 Z  B7 V

Verification of main contact position, position of the handle

8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-2 , [0 p2 B* d, S/ ~, S

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) ) E" ~- }4 k! ]! Y* t6 D6 B. k

- X) i' ^* n3 _0 y+ [% b& K! L1 g/ Y# zStandard(s): IEC60947-1, IEC60947-
2, IEC60947-3
Sub clause(s):
6 Z% @' E8 e2 [6 A8.2.5.3.2 of IEC60947-1 and
% I4 H( y0 g- J7 T- F8.3.3.9 of IEC60947-2
' K) E2 s+ F  p# ~1 ESheet No.
" L% W$ `2 _) b; W8 VDSH 588
Subject:
7 v: h3 g- @7 n4 Y) m( [9 h$ I; DVerification of main contact
/ q4 p! e% F0 @3 E0 ~5 u9 ^1 oposition, position of the handle
Key words:
- suitable for isolation
- indication of contact
; m1 I; _& ^0 Q  t5 Y, B9 u1 tposition
Decision approved
during the CTL Plenary
Meeting 2006
- R( t; Q2 C' i& n5 Z3 T7 h5 uQuestion:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
" n2 q* j, I) @" J5 ?additional requirement to be verified. With respect to this test, the following two questions gave rise to
1 H3 h- ?0 `3 G6 Sdiscussions
5 }/ n' S* R9 F- R' c  ]+ o% Z( uQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which
0 a8 h, p8 ]% Y# `4 J) k* ]is not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of
/ d7 h% f4 P! r9 g; M2 T* M7 t" Z0 AIEC60947-1?
! {& X  m! O& A( z6 Y5 c4 LQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how
; _# ]  _5 O" v. h: Z  w: n, g4 tshould section 7.1.6.1 (additional constructional requirements) be interpreted?
Decision:
There are two possibilities, depending on the features of the MCCB:
! }" `1 k0 [" S' J1) 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
% w; }+ Y. l6 r& f) m% R3 J5 y* m4 kseparate position indicator.
+ _3 h+ G, Q0 Q! B* F; D" J+ yFor construction per item 1, this result is not acceptable
For construction per item 2, the result described is acceptable if the separate position
3 h0 k# b9 s0 J( M8 e4 Aindicator unambiguously shows the closed position, irrespective of the position of the
- H$ |, C- y" c: ~* Dactuator.
$ i: F2 K- D/ A3 [Refer to IEC 60947-1, Clause 7.1.6.1
" }. k, w: ]: h3 }
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