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标题: DSH 593 New glow wire test requirments (650 C) for parts close to contacts [打印本页]

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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

New glow wire test requirments (650 C) for parts close to contacts 0 |5 Q0 o4 S4 J: H3 ?3 K

Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1

61058-1(ed.3) & 60947-1(ed.4) 1 T1 Y/ l: _% u4 F; r- b

Standard(s)- (year and edition):
IEC 60947-1:2004 IEC 61058-1:2000
0 J0 ?% v4 N" C7 uSub clause(s):
Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1
Sheet n°:
3 s4 M. P0 L8 i# SDSH 593
) v; T1 o2 y) n0 [5 jSubject:
New glow wire test requirements (650 °C) for parts close to contacts
" `% c# F# @4 Z6 M$ ]Key words:
5 a6 ?$ T: C; X4 ]- glow wire
Decision approved by the 44th CTL meeting 2007
8 z) d: K1 N8 JQuestion:
Due 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?
Decision:
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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