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|  DSH 593$ Q" d5 v) u$ ^' k: N6 X5 t
| New glow wire test requirments (650 C) for parts close to contacts# i3 m/ E( b( {3 W, e, m
| Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1/ W5 c$ y' |/ V$ g0 K. L
| 61058-1(ed.3) & 60947-1(ed.4)
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Question:
: V3 J/ T: q q: I0 L3 \+ VDue 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?
. H, c0 r, @* f: B h, |4 B9 f( j/ D* QDecision:; G E- g+ ~: \2 I" {- d
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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发表于 2012-9-5 12:32
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