4 U$ i4 X3 p5 F" t- TStandard(s): % ]4 ]! I+ n2 _6 Z" ?3 ?% KIEC 60745-1:2006 5 F) j o& G. d9 Q; q" b9 ]& n3 ?5 NSub-clause(s): * s3 {) ~. f, ^" @/ o21.19" Z3 J1 l- w$ A# G# r
No. Year B3 ]2 t7 k! J) Y0 ^
DSH 2 u. d1 x' W ]1 [754 $ i; ~* I" ]+ w: ~ b2010 2 S4 G* Y8 t8 v* mCategory: TOOL Developed by: ETF 1/ w! J: h! G3 c. p8 l! k
Subject:6 ]. N0 G5 G3 {) U6 i' t* }4 }7 ]
Screws, Creepage* ]0 `( q! B, n
distance and clearance8 A' H' X3 j; o4 g5 C' e
Key words:- f' y# Z1 b- y, k
- Screws ) d$ H3 {1 E, l' n- h- force8 E( A/ y ?0 W) j- K
- Creepage distance and- j' Q4 d+ h( [. t) a
clearance " k' c; ?3 X% g0 s9 g- tApproved at the 2010 CTL: V+ Q Y: ?% Q2 Z# y
Plenary Meeting: B# ?# f* _8 E1 q2 ?
Question: ! a4 _" r& \! z Q0 k$ q1)6 B7 c3 V. @% c
“Tools shall be so designed that the protection against electric shock is not affected when 6 k5 u( p- j0 L* k3 Kscrews intended for replacement from the outside during routine servicing are replaced by & Z' [/ P5 V$ E3 ?! Uscrews having a greater length.”! k- L; C, _( B9 E- d% J) |: L
What screw should be used? Only the screws from equipment under test or any other# Y. e7 Q& h( u
possible screw? ( |* X7 B; a* c4 ? E9 J2 D4 V2) ]7 v8 }, _7 ]1 h0 `" C
“Compliance is checked by inserting longer screws, without appreciable force, after which ' g: i& c, x; L2 o0 Ocreepage distances and clearances between live parts and accessible metal parts shall not2 U E6 G* ^2 F) n* d% o/ o9 x4 A
have been reduced below the values specified in 28.1” . `7 E1 I0 X. }! B6 U5 JWhat force is to be applied? 4 c( f+ D$ u! n0 S( WDecision:( h. o7 A; X g) z! f8 q
1) : }% a9 F5 o3 XThe screw originally used on the equipment and any other longer screw that can be found4 G4 Z. _8 g7 l$ q0 T
on the equipment is to be used.; b( X& s+ O- g, c9 {8 R7 E2 m
2) ( G2 z0 _' ^' U$ ?4 tThe force values in Table 9 shall be applied. S8 f/ j% q7 g( s7 ^+ p1 r( Q( o[attach]77271[/attach]7 ~, P3 Y6 `) p* X9 D: e- k
DSH 754