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13.2.1 Compliance is checked by the following test:
9 S) M/ w8 E, CThe test is not made on parts of ceramic material or on insulation of wiring.6 O6 a. v. ~! R# e/ j
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the& O5 E. U% h" `- c
operating temperature of the relevant part determined during the temperature test (normal- L# Z' {& Q/ y: @2 N
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying
+ _; ^, d5 D+ Y" xparts or SELV parts in position are tested, and 75 °C for other parts.
% M- | F- g5 h! }! ~The surface of the part to be tested shall be placed in the horizontal position and a steel ball of9 g2 i7 [( L% g/ C
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this! x( V; P% ~% Y Q O2 o# M6 x
test is shown in Figure 10. If the surface under test bends, the part where the ball presses
- x" K. [. x4 a( dshould be supported.. T7 `8 N+ m4 i* P7 w- [. q' N4 E
After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
7 i4 ~4 [! N+ l7 Aimmersion in cold water for 10 s. The diameter of the impression shall be measured and shall) s+ L0 a) B$ C1 C# b: a
not exceed 2 mm. |
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发表于 2012-3-9 11:27
