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20.11.3 Lampholder contact shall be reliably secured in the lampholder body by means other* E+ ]! R( I$ a+ I7 y9 O# T
than friction to avoid such a displacement of the lampholder contacts that live parts of the
% F& ]" D4 e( c& O6 t, ~/ }, vchain become accessible. An example of an adequate securing method is by the provision of
: M& S2 b) j) v9 W2 E+ w: Oears on the contacts of the lampholder.) |. O8 d' e- G& N7 g, u
Compliance shall be checked by inspection and by the following test.
2 S; E% q- r- S* |% T0 {9 XSix lampholders are heated for 7 h according to the requirements of clause 12.3 of section 12 of
# O4 s# A1 X( P9 m" `IEC 60598-1 in an orientation to reach the highest temperature. After the lampholders have" O1 A" {, }; G0 S# A
cooled down to room temperature, the incandescent lamps are removed and a force of 15 N is
9 k+ e$ C1 F" S* S7 l; Vapplied for 1 min to each of the conductors connected. Following this, a force of 30 N is applied& i+ e% v: I; u' L" ?: W' C& C
for 1 min to the two conductors together. The forces are applied at a distance of 3 ± 0,8 mm
8 C1 ?0 c7 { A$ Q; K7 Sfrom the insertion points in the lampholder so as to try to move the contacts from the! y" [! m: | _( w" Q
lampholders.
5 v) g# r: F9 t7 m+ @During the test the contacts shall not move more than 0,8 mm. An example of a device suitable) o' Y7 v6 J/ S# f; Y: r
for this test is shown in figure 2.) _+ S- M: I5 r c0 s8 W
/ f; b; g+ [9 U些段中要求的温度是多少? |
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