DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729 5 F" i1 l- o+ s1 } 6 ~9 s# I' S/ S5 N/ c

Temperature limit of main enclosure over heat sink

7.1.1, Table 3, note b

60065(ed.7) , [& f& v4 x8 O( C0 j% u

  l1 m0 L- ~3 G% Y: hStandard(s)- (incl. year) No. Year
IEC 60065:2001 DSH
0729
2008
Category:
* U& z. q; C" N. n0 YTRON
# n* h: }$ U; D/ N+ kSub-clause(s):
/ l. U! W, q. {  V' P# k7.1.1, Table 3, note b
Developed by: ETF2
! P/ T7 h4 e) B( |8 CSubject: Temperature limit
2 K' S+ V4 E0 Dof main enclosure over heat
% B8 M, p: v0 Zsink
7 z' J1 O1 B2 R0 V9 z& X5 zKey words:
- Limits during normal
- S- t0 l* ^0 I! v; O6 d5 Xoperation
- Not likely to be touched
during intended use
+ L' b  i) l; |" T! |Decision approved at the
* Z4 _: \* i  _$ f- U/ L46th 2009 CTL Plenary
) X) C# f9 V* o9 i( l7 W; cMeeting
: n/ a9 U" o& W( b: FQuestion:
6 f- F5 I6 o5 H( HCan the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
internal heat sink in the same way as is applied for vacuum tubes following DSH-566?
Decision:
$ l% g4 W, ?! K$ H8 `The 65 ° K rise limit may be applied to the enclosure covering an internal heatsink, if:
·  the symbol (IEC60417, 5041) is marked on or adjacent to the heated area of the surface of
5 L' y* @1 E2 z, I/ g1 ?3 j' X, }, Ythe enclosure, and
·  the minimum distance over the surface of the product between this area and any control
6 h+ G/ J& ^/ j- p( d6 }intended to be operated during use is 150 mm or greater, and
·  the instruction manual gives information regarding it.
2 K3 ~+ ^9 W/ R) k* o5 L6 _+ |& {