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

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DSH 588 7 x3 x) _+ j4 d7 F! { 6 j( d1 P. ~& c# S( P6 @3 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

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)

Standard(s): IEC60947-1, IEC60947-
2, IEC60947-3
Sub clause(s):
8 D' d2 f5 u7 L, z5 b( P( ^8.2.5.3.2 of IEC60947-1 and
8.3.3.9 of IEC60947-2
2 t/ C6 o+ M, p3 R, X) ?0 J9 ASheet No.
* u2 y$ ]. J' Y# D$ ?2 RDSH 588
Subject:
Verification of main contact
% C( z% F, R" J7 D9 `0 R3 p( sposition, position of the handle
1 [3 _; Z+ n2 o7 mKey words:
- suitable for isolation
2 z3 X4 e' {' X" q4 l$ B! k! t( w- indication of contact
position
Decision approved
during the CTL Plenary
Meeting 2006
9 y) b" a6 y% Z0 o1 x9 @# {7 nQuestion:
- }& D4 F8 v- Q7 e( nVerification of the main contact position is conducted only on products suitable for isolation. This is an
additional requirement to be verified. With respect to this test, the following two questions gave rise to
$ {- F8 S# _: p2 ?discussions
* U; v2 ^' U3 m) P8 e  tQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which
. K& B% _+ y% s5 d/ @is not the tripped or open position as indicated on the product), is this a pass 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 or how
1 ?/ H/ I& Y. Y( lshould section 7.1.6.1 (additional constructional requirements) be interpreted?
Decision:
. U3 k! i' R% XThere are two possibilities, depending on the features of the MCCB:
1) The indicator is the actuator, and it is the only position indicator, or
0 e# i# }$ S+ r+ u2) There is an actuator that may show the operating position, but in addition there is a
separate position indicator.
8 j! [2 `2 y; `  R9 lFor construction per item 1, this result is not acceptable
2 p( ]5 Y7 J' O+ |$ d, |$ `+ lFor construction per item 2, the result described is acceptable if the separate position
indicator unambiguously shows the closed position, irrespective of the position of the
6 F2 y4 y/ ~7 x4 Oactuator.
( H) h# W: P* g1 Q. ?! U; j3 R/ p! VRefer to IEC 60947-1, Clause 7.1.6.1
& M8 q1 Z8 H/ ^$ t: s) d( C( f
1 ~5 Z$ j+ R. H8 v! U$ D# y
- h* \; w8 \8 w. r: q. ~