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

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DSH 593 / \2 i+ Z8 S3 Z: |  m4 r+ N - [: y8 c# \& O- X3 ]* @+ h

New glow wire test requirments (650 C) for parts close to contacts + d* V1 |0 C8 ?1 ?

Clause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1 , S. Q6 g2 b0 F+ k* x* v, g7 d. B

61058-1(ed.3) & 60947-1(ed.4) 9 q9 _6 ?( v) I5 q% @- e

0 k( z: D  o2 k3 E* w* ZStandard(s)- (year and edition):
( E. u) Z$ V- S, L0 q9 e5 a  d+ yIEC 60947-1:2004 IEC 61058-1:2000
Sub clause(s):
9 W0 f! @& A( E  b4 ?9 h+ dClause 7.1.1.1 of IEC 60947-1 Clause 21.1.5 of IEC 61058-1
Sheet n°:
DSH 593
Subject:
New glow wire test requirements (650 °C) for parts close to contacts
Key words:
- glow wire
Decision approved by the 44th CTL meeting 2007
Question:
  ^" x) u) T6 Q3 |$ ?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?
9 c2 r7 O$ ?+ N! M9 J; S/ ~Decision:
6 P! X: e7 s6 s  Z2 |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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