|
|
13.2.1 Compliance is checked by the following test:7 C, N- V2 W3 @5 ]: b2 i Z$ A. ~
The test is not made on parts of ceramic material or on insulation of wiring.
! Z' G* ^' z0 H. J LThe test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the
7 n. m, F8 J: ~ z9 n3 I2 X3 Woperating temperature of the relevant part determined during the temperature test (normal
3 N, F2 k0 @% c9 Zoperation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying
6 }4 l. T. j# O: a* u, b9 e( u5 dparts or SELV parts in position are tested, and 75 °C for other parts.8 @' A; w1 o2 G; a+ ?
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of
0 r7 U9 Z' D: J7 e H5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this$ Q( C/ C( a* D4 J2 X) r8 |
test is shown in Figure 10. If the surface under test bends, the part where the ball presses* \6 E8 A. o( y4 s
should be supported.
1 B: R6 M3 T+ A* U8 H) n4 V. }After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
0 Q1 k, t( Z' l: ~immersion in cold water for 10 s. The diameter of the impression shall be measured and shall# {( ]6 N6 H3 }* b+ W
not 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
