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13.2.1 Compliance is checked by the following test:
; w" S4 J( s. u$ e& FThe test is not made on parts of ceramic material or on insulation of wiring.
3 ?; \0 ]% K# `" x" h: C; SThe test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the
. O. \2 c: ?$ J7 q5 Voperating temperature of the relevant part determined during the temperature test (normal9 i$ e3 N% a: k5 L5 P
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying
3 R( Q" |5 i% Q1 G; D. ~5 l/ Z# U( p ~parts or SELV parts in position are tested, and 75 °C for other parts.
' ?' Q% [, Q, ~ Q6 |2 N: fThe surface of the part to be tested shall be placed in the horizontal position and a steel ball of% ?, c) B( F, ]5 L- b% O* @
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this% B3 @$ f* v4 {7 Y" ~! G
test is shown in Figure 10. If the surface under test bends, the part where the ball presses
& @3 f- A2 \" J2 O' u- @3 Fshould be supported.
6 Z5 m& K7 |$ i& @/ UAfter 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
, T4 n; b" k9 R) O3 e; Gimmersion in cold water for 10 s. The diameter of the impression shall be measured and shall/ k9 H# a6 d5 N5 Q d
not exceed 2 mm. |
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发表于 2012-3-9 11:27
