|
|
13.2.1 Compliance is checked by the following test:* ^5 d/ ~4 t5 Z, _/ Z9 |/ q
The test is not made on parts of ceramic material or on insulation of wiring.2 K$ e) ] I% U2 R& D$ L- q, q
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the4 r& |. I" d% x* K7 @$ u
operating temperature of the relevant part determined during the temperature test (normal/ J) e, u J0 a' m& m; l9 n
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying
9 N) R6 {. }8 X, hparts or SELV parts in position are tested, and 75 °C for other parts.- t1 d; R# _7 d
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of
* G3 U) R4 H# q% I4 Q: j3 q5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this
4 D) h' Q- y7 P2 z; P7 j: l- ttest is shown in Figure 10. If the surface under test bends, the part where the ball presses
( s4 D. e7 b8 S! _) R1 t& `- [6 `should be supported.6 q- q0 S% d4 r1 ^# V4 `2 Q* L* f5 q, S
After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
# e. h! B' o& Oimmersion in cold water for 10 s. The diameter of the impression shall be measured and shall
6 G j+ F3 n# m5 e; d; onot exceed 2 mm. |
|
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 )
窥视卡
雷达卡
楼主
显身卡
发表于 2012-3-9 11:27
