DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729

Temperature limit of main enclosure over heat sink , Y" A5 }) T/ n% `/ I0 s1 d* F

7.1.1, Table 3, note b / S8 L/ \( ?7 w) T& d6 _" E& G6 Q

60065(ed.7)

Standard(s)- (incl. year) No. Year
IEC 60065:2001 DSH
0729
2008
: ^# ~9 |1 u' k  {  \% Q- bCategory:
TRON
Sub-clause(s):
3 e$ V/ K8 |8 j; X9 y  Y/ i7.1.1, Table 3, note b
Developed by: ETF2
, p, X9 n8 U2 G1 k% q  x* mSubject: Temperature limit
of main enclosure over heat
( d0 B& O& r  Nsink
Key words:
5 ?/ s: N& J' B3 Z! E7 P- Limits during normal
operation
- Not likely to be touched
during intended use
Decision approved at the
" J/ `. r- |" P8 G% ?, N) _. B  q8 E; U46th 2009 CTL Plenary
Meeting
: ~. b0 b4 O5 e; ]0 mQuestion:
Can the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
1 {" |8 _$ D# ]internal heat sink in the same way as is applied for vacuum tubes following DSH-566?
- H4 t& S6 Q: x  kDecision:
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
6 ^' q4 g5 j1 N, \the 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
9 G" s; u) P. X# f- O& g·  the instruction manual gives information regarding it.
! a1 m) b/ R5 i8 M( u$ R( v
! K  P* o7 H, n# S- u