DSH 729 Temperature limit of main enclosure over heat sink

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DSH 729 2 u  K  z$ l5 s3 ?( Q2 ?: N . D$ [1 M* \/ e

Temperature limit of main enclosure over heat sink & ^6 D- H& B3 A% D! t  Z" G" K

7.1.1, Table 3, note b 6 b$ O  d* U  e7 Q5 g

60065(ed.7)

+ E( B; v: }. N7 o! Y! bStandard(s)- (incl. year) No. Year
IEC 60065:2001 DSH
0729
2008
Category:
3 n+ W! c, d" E3 l8 B. ?* B- JTRON
Sub-clause(s):
) i6 y9 O: k  m. p7.1.1, Table 3, note b
Developed by: ETF2
Subject: Temperature limit
  i5 i' m! a" @1 Pof main enclosure over heat
sink
4 ^3 d; q9 `: k& UKey words:
- Limits during normal
operation
) f/ b) y. Y* t  `8 P5 S. m- Not likely to be touched
during intended use
Decision approved at the
46th 2009 CTL Plenary
Meeting
Question:
6 W- M2 k: b" w% Z3 lCan the 65 ° K temperature rise limit be applied for the surface of the main enclosure covering an
7 k/ E- `; ]8 V+ |  f' `3 yinternal heat sink in the same way as is applied for vacuum tubes following DSH-566?
Decision:
; g" K8 A4 [/ q+ C1 r" x) l* ~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
the enclosure, and
% f, D! _" u; g·  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
, M/ N7 l; G' p) H- i0 C1 y6 P·  the instruction manual gives information regarding it.