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|  DSH 588' N+ s' E. h2 C* W& k
2 {$ u8 j8 _, U0 d# o/ c# M
| Verification of main contact position, position of the handle
" r4 |) O$ d' {: [: x | 8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-2
, z( O' [, e0 K: Z. H | 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)1 C/ |, [4 q6 l' h4 j& s
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Standard(s): IEC60947-1, IEC60947-
0 {( C9 x# Y$ f8 P' ^2, IEC60947-3
- W0 d! }7 X' G. qSub clause(s):
% C" E0 j7 @/ f8 A3 L8.2.5.3.2 of IEC60947-1 and# o/ D% L1 X( E# w
8.3.3.9 of IEC60947-2% b! I, b1 o6 ^" M3 B
Sheet No.
, c/ t8 r% c/ Q" t4 V7 N$ X& h( @7 f% BDSH 588
) i! x; m. J8 w$ ISubject:4 t; A! J, r% g/ W4 l* k
Verification of main contact
; |2 V/ a, a9 ~2 @, ]0 I* ^" Bposition, position of the handle% m" w. _, C4 X" F8 J7 A
Key words:
h u3 e5 W9 ~) E- suitable for isolation
d" P8 H4 p6 A* l5 s/ H2 m, [3 ]- indication of contact6 b! u2 ~+ ~% T2 a7 g, u# G
position
1 k- Z9 D: r: D& [Decision approved$ m5 P. j3 @/ ]; a4 h; q' }* E
during the CTL Plenary$ V/ a9 {% H0 C* a/ h, N p
Meeting 2006- ~- E6 \% R3 N# C! x, H( I
Question:
# a$ Y1 O1 K. d1 z! f' V/ vVerification of the main contact position is conducted only on products suitable for isolation. This is an" a4 U! K+ T; C% g9 @% y
additional requirement to be verified. With respect to this test, the following two questions gave rise to
0 c$ r! w+ A5 E9 ^9 Hdiscussions! s; R2 ~, c7 ~- D
Q1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which h4 Z; F C! N' W1 B; a
is not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of
/ L2 n$ j/ B, l1 M: I: ~; B& qIEC60947-1?7 {) V# ~9 z5 R: S. f5 m4 l
Q2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how
( \3 H% Y( e) T ]8 L/ a0 `should section 7.1.6.1 (additional constructional requirements) be interpreted?; H: [# D3 T% V) v5 u: H1 J
Decision:+ e% g, O/ X; [8 l8 I7 n2 b
There are two possibilities, depending on the features of the MCCB:
( T# a# ?# N. O+ z4 o3 }! ^8 U1) The indicator is the actuator, and it is the only position indicator, or+ K5 X- }7 \, r' }' t
2) There is an actuator that may show the operating position, but in addition there is a" S( S9 L6 h" S- E
separate position indicator.
7 s- c0 S+ m5 i; S5 J6 K6 v nFor construction per item 1, this result is not acceptable" B3 C% h: l" z: {% J8 o1 D
For construction per item 2, the result described is acceptable if the separate position
) n3 u2 K6 l) E+ k. P' oindicator unambiguously shows the closed position, irrespective of the position of the
2 ^4 D6 O+ K/ [, J( P. q+ Mactuator.4 h4 N' @0 C7 X2 b" R; `
Refer to IEC 60947-1, Clause 7.1.6.1- M# H6 n5 F- r2 m: W( Z
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发表于 2012-11-7 18:30
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