DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729

Temperature limit of main enclosure over heat sink 3 [2 M' d8 K+ \& _# U; q9 E$ e5 a

7.1.1, Table 3, note b

60065(ed.7)

Standard(s)- (incl. year) No. Year
: Y7 t, J) C! u0 S- S" d& `IEC 60065:2001 DSH
+ L2 Q7 c- G4 ?. ~4 y# y1 q+ N: M$ w0729
2008
Category:
TRON
7 X. p2 y. q+ O; VSub-clause(s):
" g$ @! }$ z0 ~2 T- B0 n7.1.1, Table 3, note b
1 c* _3 u& w6 {' \# V: iDeveloped by: ETF2
Subject: Temperature limit
0 N2 U+ ?' M/ a9 I  c+ N2 Mof main enclosure over heat
sink
: C" ?% A9 T2 G% {* mKey words:
: R! U  w) b8 h& {0 n- Limits during normal
operation
- Not likely to be touched
during intended use
Decision approved at the
46th 2009 CTL Plenary
" A4 |8 K$ J4 K4 g$ q& K  cMeeting
3 U2 B  {) P+ [0 T, MQuestion:
* t2 J. h2 z2 r; h/ E- l( ?9 gCan the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
* Z$ g- Q( ?6 s7 x) S5 g  iinternal heat sink in the same way as is applied for vacuum tubes following DSH-566?
+ S* q7 i0 U7 F# u; x" A, a" NDecision:
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
  v# n% v, K* u% ~the enclosure, and
; h4 a, m+ M# m  F1 F·  the minimum distance over the surface of the product between this area and any control
$ n8 I- q/ [. L: C  ~6 Dintended to be operated during use is 150 mm or greater, and
·  the instruction manual gives information regarding it.


+ X+ W/ g6 e* O$ _4 K( z' z4 p