DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729 " `. w/ Y/ f* {1 ~8 y

Temperature limit of main enclosure over heat sink * r. T4 n3 ?& p# ?- z

7.1.1, Table 3, note b

60065(ed.7)

Standard(s)- (incl. year) No. Year
" [( {5 k+ {9 M8 o* B0 WIEC 60065:2001 DSH
% N" X. P+ ~4 b0 M/ {0 J+ h0729
2008
Category:
TRON
Sub-clause(s):
/ X# P8 j# s* ~  r3 p. L4 }7.1.1, Table 3, note b
) _" P7 p6 H+ ]Developed by: ETF2
Subject: Temperature limit
# I3 f9 q1 t6 o) Mof main enclosure over heat
" Y5 p# v- b8 A( Ssink
$ {- U6 N0 u8 T% n% }) q% \9 k) W" _Key words:
  f: e& `; B, e: F; P6 q# \- Limits during normal
% U+ i$ @6 z9 R0 a, n7 {operation
- Not likely to be touched
+ T% g( `: O, u0 f/ jduring intended use
Decision approved at the
46th 2009 CTL Plenary
; t' j5 w& a# yMeeting
& e2 Y) T- A- R8 i% ^& C5 CQuestion:
1 G& T* h. ?2 z: g! S% O0 SCan the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
/ ~5 H/ k0 T: ?4 g; a  yinternal heat sink in the same way as is applied for vacuum tubes following DSH-566?
* M( f- I% D! ~/ ADecision:
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
" F: m1 X( O! w- o3 ^+ m+ Mthe enclosure, and
·  the minimum distance over the surface of the product between this area and any control
8 B$ [2 q- l2 Y7 G" f& Aintended to be operated during use is 150 mm or greater, and
·  the instruction manual gives information regarding it.
2 z5 g1 d! o( g- X
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1 E  m2 k' T. S