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13.2.1 Compliance is checked by the following test:
% h2 {% Y1 z0 ^5 IThe test is not made on parts of ceramic material or on insulation of wiring. P# Y- a5 d" c4 v4 ]. W, a7 a% Q
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the
3 s) K- b8 v: |! L Boperating temperature of the relevant part determined during the temperature test (normal( M$ m# O' Z+ |( R5 s( M$ u
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying
: D: C# ?' T0 U8 U8 tparts or SELV parts in position are tested, and 75 °C for other parts. e0 N* w3 c) T0 s( v* ^" B( U; _
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of3 A- B f( P( D% E
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this
5 ]# f% d, ]" b$ ^test is shown in Figure 10. If the surface under test bends, the part where the ball presses
K8 y8 R3 i7 w+ ~$ s) y0 Nshould be supported.
( Y( ?5 h# Z* V$ O% X: lAfter 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
6 m f6 }* L4 T% v0 y$ J* Y- m/ E7 {) Fimmersion in cold water for 10 s. The diameter of the impression shall be measured and shall1 w! m+ J9 u2 ~. R# g
not exceed 2 mm. |
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发表于 2012-3-9 11:27
