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[POW] DSH 588 Verification of main contact position, position of the handle

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发表于 2012-11-7 18:30 | 显示全部楼层 |阅读模式
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DSH 588) r6 R6 k, U1 ~, e4 @* ]! t
9 N1 @) J7 P( u6 V
Verification of main contact position, position of the handle
, @, B8 m+ A2 b9 t/ k& x
8.2.5.3.2 of IEC60947-1 and 8.3.3.9 of IEC60947-23 h# k6 x9 @8 ?: I- I4 S1 q' p6 u
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)$ x: k2 A$ Y, m6 u! Y( a

* @5 H; \3 R# I( Q1 \Standard(s): IEC60947-1, IEC60947-
$ j/ c* R5 K  u+ Y" i# L# e4 c2, IEC60947-3
" m0 h4 u" z, G" O1 n$ h) USub clause(s):
# }  y# {; \) @+ Z0 y( J0 h, |8.2.5.3.2 of IEC60947-1 and
- s3 ]$ z! r4 U4 p8.3.3.9 of IEC60947-2. D- W% Y: _% k
Sheet No.
5 o) j6 h/ H$ y6 N( F$ [; k5 \DSH 588: |) `! B, v/ `8 u( f% X% r8 j# n
Subject:
! s8 U: D. Y2 K2 IVerification of main contact! J) g$ m( G% n4 p; i
position, position of the handle
6 |" X9 p& H6 |: yKey words:% V; F# @! M( N8 q8 S' a
- suitable for isolation! E; t. d/ O3 V6 R- o
- indication of contact8 {6 ?0 z0 }: k2 F/ {
position' c. ]0 m. P& e# S
Decision approved
6 y4 v- n# {# y, o6 v: U* Aduring the CTL Plenary
0 e- F0 |; s. H" CMeeting 2006' d% s/ b; ?6 M
Question:! M0 W  j  C* D- b& Z
Verification of the main contact position is conducted only on products suitable for isolation. This is an9 c9 V; C2 L8 T
additional requirement to be verified. With respect to this test, the following two questions gave rise to
9 B: G, W  A% _4 A% ?discussions1 V  T; r, r0 p" r/ F: `
Q1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which( v3 [9 D6 ]+ T$ n, ^; R2 N7 k8 \
is not the tripped or open position as indicated on the product), is this a pass when tested according 8.2.5.3 of
/ W2 W7 K% O+ b2 N% B4 O: LIEC60947-1?
' t. n) O/ v! w2 B- _; IQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how4 }& D3 W2 o# ^
should section 7.1.6.1 (additional constructional requirements) be interpreted?3 C! \5 ~5 Q6 B8 ?& o) _0 z
Decision:( I: _" z1 R  S( ^3 a- r
There are two possibilities, depending on the features of the MCCB:( L1 Z) o0 `1 p# ~+ d& |
1) The indicator is the actuator, and it is the only position indicator, or
( M7 k+ X" u6 t. b2) There is an actuator that may show the operating position, but in addition there is a
# i8 i* L4 E! t' {- D* ~: f' bseparate position indicator.
& M7 i6 N" v0 _$ mFor construction per item 1, this result is not acceptable2 N  m# _: V2 i8 w! B6 ~9 d* R
For construction per item 2, the result described is acceptable if the separate position' P6 ^9 ?, P" m: k
indicator unambiguously shows the closed position, irrespective of the position of the( Z; a$ a( x  Q: F: |. a8 L
actuator.* v/ H3 U9 H2 ~( c3 V, p
Refer to IEC 60947-1, Clause 7.1.6.1
& {+ n: `# a1 J4 \/ r" ?; M
1 e5 H$ [. T" {, ^1 @& ?) M) A3 `1 f

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