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标题: DSH 593 New glow wire test requirments (650 C) for parts close to contacts [打印本页]
作者: 小米    时间: 2012-11-7 18:28
标题: DSH 593 New glow wire test requirments (650 C) for parts close to contacts
DSH 593
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4 X  d* ?7 B3 M( N8 V7 j7 g5 _/ `		New glow wire test requirments (650 C) for parts close to contacts
) I. L# i& H4 d9 S  _) s		Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-15 }! m( a: w: [! F8 B  v
61058-1(ed.3) & 60947-1(ed.4)
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Standard(s)- (year and edition):1 \! m/ j/ L3 v1 z$ K6 W" |3 o
IEC 60947-1:2004 IEC 61058-1:20003 K# L' E* [  u: k
Sub clause(s):
  ]5 B, c4 ~; j4 [Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1
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DSH 593
7 K% Y! ^* W( D( i4 ISubject:
6 E& f8 z. y1 A( z% `New glow wire test requirements (650 °C) for parts close to contacts$ f4 c  a0 }; d6 q% a7 v
Key words:
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Decision approved by the 44th CTL meeting 2007% J* ?% p1 q2 x7 f5 f' y: f% f
Question:
# P: V; O: ~7 ?" Q$ IDue to the new requirements of 60947-1:2004, parts close to contacts are subject to glow wire test performed at temperature of 650 °C. Is a glow wire test necessary for the green part (figure 1) or isn’t a glow wire test required for this part?
4 r5 J6 J- N. _0 }. ]Decision:9 ]# _+ [0 Z3 Y' d- y
Although the green part (figure 1) of this switch is mechanically separated from the contact element, the glow wire test should be done with 650 °C. During normal operation, the switching element and the contact element are mounted together. Due to this fact and the relatively large amount of material, a test should be done.
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