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|  DSH 597$ t- a( D* M( k# C6 w3 ^) E; k
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| Verificaton of main contact position, position of the actuator9 \0 _8 s- E( z6 ]% \7 i; o+ W
| 8.3.3.9
4 O" v" t0 V) X9 O. [, H0 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) & 60947-2(ed.4) & 60947-2(ed.4);am1
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Standard(s): IEC60947-1, IEC60947-
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+ \( K. V8 A" y5 }7 u+ ySub clause(s):. Z, s1 ~; A; [* t) ~) Y
8.2.5.3 of IEC60947-1 and" }# s& U; z( v* l. j6 t3 f# J
8.3.3.9 of IEC60947-2
8 g3 a& K" U5 @7 kDSH/ m" B. s# c4 L* \$ u
5979 E, m' U6 \3 Y4 V3 R" k
Subject:
0 c5 n: `% y7 a. i' l6 i2 U9 z% i# |Verification of main contact/ K4 T2 L _: W5 ?/ y
position, position of the actuator
9 B, v$ P# {0 D* k) o- ?; bKey words:3 L# P& a6 S. G! ^) c- e: E; d
- suitable for isolation
) p. h1 X8 d/ `9 y) D* |- indication of contact
9 b# A1 N7 q/ Vposition& V9 t4 z3 v, s
Decision approved by0 w* I- j9 z+ z& d* |& k0 S
the 44th CTL Plenary
/ N% k4 z* }/ @meeting 2007 k7 z' d+ U" g4 t# E7 }6 l
Question:
5 G1 _; P' K( w/ b% y6 z, x' pVerification of the main contact position is conducted only on products suitable for isolation. This is an/ v# g2 W$ R5 C
additional requirement to be verified.; H& I0 G# [' P( ^, q+ {3 K! Y9 i) P
Q1: After the 3F test, the actuator comes to rest in a position between the trip and open position (which is! y7 X) T1 {9 j( C$ ^( j; R1 k/ Y
neither consistent with the tripped nor with the open position markings as indicated on the product). Is this a: [4 C2 F* \6 ^. |
pass when tested according 8.2.5.3 of IEC60947-1?
! d4 D3 m7 y! `' S% Q# pQ2: If the answer of Q1 is yes, is this in conflict with the general constructional requirements of 7.1.5? How- i+ ~: G* G( N+ Z; a1 s
should section 7.1.6.1 (additional (constructional) requirements) be interpreted?
7 K+ h# u- f" SProposal: F" p, W+ F& Y6 Z
There are two possibilities, depending on the features of the breaker:
; O% |) t/ t8 J( n! a1) The indicator is the actuator, and it is the only position indicator, or& b9 e$ t( v4 }. q
2) There is an actuator that may show the operating position, but in addition there is a
- o: M) m+ V% a( j4 o, Nseparate position indicator.
- q$ E# W1 M5 K; i8 l$ |For construction per item 1, this result is not acceptable
# Y$ @5 ?# v9 {3 u! t( yFor construction per item 2, the result described is acceptable if the separate position& @: s' F$ V/ L% c4 O# d4 {1 y* k
indicator unambiguously shows the closed position, irrespective of the rest position of the
, _* E3 t) e$ J& ]% Yactuator.3 t0 N' p n: G" V
Refer to IEC 60947-1, Clause 7.1.6.1
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发表于 2012-11-7 18:25
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