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标题: DSH 588 Verification of main contact position, position of the handle [打印本页]

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作者: 小米    时间: 2012-11-7 18:30
标题: DSH 588 Verification of main contact position, position of the handle

DSH 588 & @" E& H4 z$ K/ l 7 j0 z: F. l. ]) e

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) 1 `, O$ I0 X! P/ f/ G' U: I

! m% t9 ~* o" T2 b0 y$ T2 oStandard(s): IEC60947-1, IEC60947-
$ V4 \9 v/ S# Y: @6 I8 Z2, IEC60947-3
Sub clause(s):
' X1 q; L' w7 u2 ?) h  @7 O' a" P8.2.5.3.2 of IEC60947-1 and
3 Y6 Z, k& w' I& M2 Z' Q3 N* s8.3.3.9 of IEC60947-2
Sheet No.
1 p* \; w. b$ k+ UDSH 588
. }- f0 G( F) H$ d& F" I! U" p+ iSubject:
5 W8 r/ [' m( u5 L* X. p. S/ BVerification of main contact
, ~9 {' ~* y5 ^: L2 }8 Wposition, position of the handle
Key words:
1 {" N" ~1 m* L$ o- suitable for isolation
- indication of contact
. e( R' c% E1 [& S" Fposition
' {7 q/ A& d, y' SDecision approved
; E' }* S; v' `4 d% Oduring the CTL Plenary
4 |2 }/ i8 u2 S9 a( w. hMeeting 2006
/ F% B  U3 |1 G2 wQuestion:
Verification of the main contact position is conducted only on products suitable for isolation. This is an
. e: E" g1 b5 H5 g% m% I) Radditional requirement to be verified. With respect to this test, the following two questions gave rise to
discussions
$ V% S- i  T1 F1 b& ^# p/ |; jQ1: When after the 3F test, the indicator comes to rest in a position between the trip and open position (which
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?
2 U6 s# }, _: Z+ g. u( I, m$ t4 WQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5 or how
) d- X' D: U' x) nshould section 7.1.6.1 (additional constructional requirements) be interpreted?
Decision:
There are two possibilities, depending on the features of the MCCB:
' a- R; v0 @( Q! ~8 k5 B7 ?1) The indicator is the actuator, and it is the only position indicator, or
. m/ w, N) N  x5 a% r2) There is an actuator that may show the operating position, but in addition there is a
separate position indicator.
/ W. ?, i$ R3 U( H/ C. mFor construction per item 1, this result is not acceptable
: y6 `" s) G7 |: F2 G# W" s6 O# {For 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
actuator.
& g# n* Y8 e+ `4 p: VRefer to IEC 60947-1, Clause 7.1.6.1

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