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|  DSH 466! e2 \( p3 j* N& |& A1 h; q
5 }7 f2 ^+ f1 n3 _% D4 v2 [- ^8 S2 o6 X& }5 `( X8 a5 D7 D8 d
| Screws and connections2 W/ @ k& u+ K Q
| 28. N% ]( d& |7 t" _* J3 ?
| 60335-1(ed.2)' G6 ]; [% ]/ f9 }. Y) }
|
3 X$ ~' s" q) [7 i4 z+ }* DStandard: IEC 60335-1:1976, 2nd Ed.
9 O, ^2 K _1 \9 RSub clause: 287 c0 f! `- f/ |9 c, B. D3 k
Sheet No. DSH-4669 }+ Z0 P( c# D1 ~* D8 w
Subject: Screws and connections
% E% a0 A' I5 vKey words: - torque test2 s9 e% F, l6 @* G) Z/ V
Decision taken at the 40th CTL meeting 2003. [/ E6 L- P8 ?9 B2 _
Question:0 s- Q4 z* ^) x: f8 K0 Q
How many times shall screws be tightened and loosened during the torque test in view of
! Y& m. S/ w4 K9 G% b+ Oprevious tests?
0 p/ d0 r) v' r3 ]6 M. t' ?) x9 iRationale:
3 h& ^: u7 `# ZSee question.
. n0 Q+ q2 r0 r5 ~8 pDecision:
/ u4 \! P5 D- c2 w; ATests have to be carried out as stated in sub-clause 4.2 of IEC 335-1:1991. The tests are$ F" b% e( l; `+ K! H# o: W# W
made on a single sample as delivered, which shall withstand all the relevant tests." M4 A% E' B: D: P3 a( ?* F! b
+ N2 N2 y3 N5 G8 P/ X, {
& R J/ v. U5 O# W# A! |+ u |
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发表于 2012-9-12 13:27
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