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13.2.1 Compliance is checked by the following test:* E3 y- q0 J* U2 ]8 {/ r
The test is not made on parts of ceramic material or on insulation of wiring.7 \& e- W7 V" s+ E Y
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the7 T4 R. N' n$ T
operating temperature of the relevant part determined during the temperature test (normal+ g a" i& s- F+ T- Q
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying* q- G& f$ r9 ]& s) y1 R( _; o( P
parts or SELV parts in position are tested, and 75 °C for other parts.1 t' I' m: |/ @4 g1 d6 H/ t- Q
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of& L4 d J. ], V2 Y/ y3 S- f3 k
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this( W* c0 R) k; {" q# [! Y# B
test is shown in Figure 10. If the surface under test bends, the part where the ball presses
6 A6 o3 [4 i* B6 Dshould be supported.0 _9 o& Z8 U" h6 a) T6 Q$ H$ l* I
After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
$ y3 Q1 B1 F0 b8 ~immersion in cold water for 10 s. The diameter of the impression shall be measured and shall
0 j- w; e" l/ o0 E8 \) jnot exceed 2 mm. |
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发表于 2012-3-9 11:27
