DSH 593 New glow wire test requirments (650 C) for parts close to contacts

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DSH 593 2 k1 U/ r' p: J1 Y+ A2 K8 {

New glow wire test requirments (650 C) for parts close to contacts

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) . {" u# \3 g( p) z: ~6 j/ v9 y

: I1 Y& J  G9 v$ x$ S* C' r' [8 }2 jStandard(s)- (year and edition):
- I- T% x# @- k3 {" IIEC 60947-1:2004 IEC 61058-1:2000
Sub clause(s):
Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1
Sheet n°:
DSH 593
" q6 a. M! C4 A  A" A6 F. OSubject:
" j# m6 ?/ J4 {) @New glow wire test requirements (650 °C) for parts close to contacts
Key words:
- glow wire
Decision approved by the 44th CTL meeting 2007
+ k( H; m9 p; S9 e5 z  MQuestion:
# n2 G7 o6 T3 h  |2 xDue 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?
1 V& Y6 X; M3 fDecision:
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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