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| DSH 588( J+ d: [8 f8 ^0 K2 k
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| Verification of main contact position, position of the handle
5 h) O( O" B0 M0 ^) C | 8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-2
& D( h' U ~! Q. { | 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)6 e. |7 a, E* S" E/ g
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Standard(s): IEC60947-1, IEC60947-% m2 e/ k* @3 u
2, IEC60947-35 _. c h# A" Y2 t' D Q! N
Sub clause(s):% o; M: F! t% T' b* u$ A0 j
8.2.5.3.2 of IEC60947-1 and1 p( I4 R# r; u9 _7 C
8.3.3.9 of IEC60947-2" r# T$ p, K" z) k. r+ s3 K& D
Sheet No.- n, v; f0 I4 t% F3 w0 x5 W
DSH 588) @& r0 x: b: Z9 e1 x4 k
Subject:+ e6 S" f' M( t, q# }2 [* Y6 Q
Verification of main contact
1 E5 f7 {* b7 A5 j6 @7 a1 zposition, position of the handle0 S# K" R/ B; f/ y2 r
Key words:/ J/ ?9 N1 L t/ j
- suitable for isolation/ K3 W$ u* b) j
- indication of contact) F ^: P; w% c* F/ a, H
position
$ y9 P. q) N3 q4 T7 H9 n# ]( UDecision approved. X1 y* S7 L, ^7 z% [; g
during the CTL Plenary: P3 k: Q# m& \+ s
Meeting 2006* c/ x) Y# t$ S! N' D( p8 ]+ l* q
Question:5 r( o2 f: |; ?3 I) \
Verification of the main contact position is conducted only on products suitable for isolation. This is an* ^8 @4 ]1 b, I4 |
additional requirement to be verified. With respect to this test, the following two questions gave rise to
, C. X( N& E, g& \0 }& H: kdiscussions
' O9 L0 I3 I4 l9 [5 uQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which* y5 z8 k2 b4 X# p
is not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of
, |5 s" O. z5 V# Q0 aIEC60947-1?7 e8 b4 I! Z+ G# ~# Y8 n
Q2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how5 v: a$ t7 u' C' V1 h9 L% Y
should section 7.1.6.1 (additional constructional requirements) be interpreted?
' S, }8 d! J: C6 @; {+ yDecision:
9 S! ?: K( f+ y7 V9 KThere are two possibilities, depending on the features of the MCCB:
, y$ l' l, c/ p' a( J1) The indicator is the actuator, and it is the only position indicator, or+ q( U$ H; V" A+ w% }
2) There is an actuator that may show the operating position, but in addition there is a
6 ^2 t3 [4 K2 Mseparate position indicator.4 k6 r, R: a' K; x; s4 F
For construction per item 1, this result is not acceptable) ~4 o2 |" ~( g) w& ~' Y
For construction per item 2, the result described is acceptable if the separate position! W8 L$ x) V [. V2 o X: {
indicator unambiguously shows the closed position, irrespective of the position of the
* K5 }) e2 g7 C( \actuator.
" f h0 {# W' ]' _8 U# {Refer to IEC 60947-1, Clause 7.1.6.1
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