DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729 : N5 I0 `0 ]; C7 O 9 {2 z6 H; L* s' G9 d- x

Temperature limit of main enclosure over heat sink 6 D6 Q' v7 q* L& m1 e6 p

7.1.1, Table 3, note b 2 f! l# d3 c1 @# @

60065(ed.7) 1 X. d' `1 |; @7 i

9 z1 x0 d+ ]1 n  AStandard(s)- (incl. year) No. Year
IEC 60065:2001 DSH
0729
. A; G" y3 ~+ i4 n! J2008
3 Y3 S8 U1 ]3 }: s) G# B. _Category:
TRON
( f( e8 x7 j" }' |Sub-clause(s):
$ L2 V* v* a/ r& G3 C7.1.1, Table 3, note b
Developed by: ETF2
Subject: Temperature limit
, I2 p2 D& w: c/ g. L3 C/ kof main enclosure over heat
2 p# g' k+ U4 \8 e- L) r+ nsink
$ c" i3 R. U& \Key words:
- Limits during normal
3 |& l* k8 ^4 r2 U1 I9 {operation
- Not likely to be touched
/ E7 ~3 e- C/ r" L; D1 ^during intended use
Decision approved at the
" t& v! d" B( y  \46th 2009 CTL Plenary
Meeting
2 i6 q6 u- a$ u$ Q6 wQuestion:
Can the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
7 P2 j! D* }# k% m" T; S, b* Einternal heat sink in the same way as is applied for vacuum tubes following DSH-566?
4 L) s% N5 m8 d3 X$ W+ [Decision:
' e0 `' a% m2 ]. Q; O8 e) o( IThe 65 ° K rise limit may be applied to the enclosure covering an internal heatsink, if:
0 I) I6 K- i0 C$ A·  the symbol (IEC60417, 5041) is marked on or adjacent to the heated area of the surface of
+ u+ @; k; p! V" C) j( Jthe enclosure, and
·  the minimum distance over the surface of the product between this area and any control
intended to be operated during use is 150 mm or greater, and
, E4 ?- E% J0 K7 }8 G6 i% `  ~·  the instruction manual gives information regarding it.

9 s! P) f( L' o