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|  PDSH 958
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| Small push in lamp Small plastic lampholder Mechanical test
: ?8 n# z8 a4 b+ P4 G e; u' m | 20.7.6
( S4 J) g* ~+ a | 60238(ed.5);am1;am2 & 60238(ed.6);am1;am2 & 60238(ed.7);am1;am2 & 60238(ed.8);am1;am2 & 60598-2-20(ed.3) & EN 60238: all editions
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" C# z3 @% g0 @# N+ v3 Y! {- dStandard(s):3 i# M7 \. ~. E
IEC 60598-2-20/2010
+ F' Z& J v. ^6 n4 z# N6 _IEC/EN 60238 All editions {1 w% J S. _5 R$ _ f
Subclause(s): 20.7.6
8 M8 z: R. D8 ^4 n0 QNo. Year PDSH 0958 20105 }$ F0 P* ]$ C
Category: LITE Developed by: ETF5 OSM/LUM
2 ^$ q0 j; ?* }+ E8 sSubject:2 t. F4 b) I( u* L# v: W" G; v
Small push in lamp) c, K$ p0 F M2 t
Small plastic lampholder/ R; D. Y# S# I' y
Mechanical test2 }) y _: ~& b! e. X# |: u
Key words:% I* N+ P3 `- d
- Push in lamp
2 [" w. M- @2 b$ U* p# L- Plastic lampholder' u! k* T, t! y4 x
- Mechanical test' h: m1 ^ i# G
To be approved at the 49th CTL Plenary Meeting, in 2012
* r2 m2 b3 Q) p' v( y2 pQuestion:. K. P' K) ?: u7 X
We seek clarification on the correct method to perform a mechanical impact test for both mains rated
+ n# ^6 P4 L* S/ o: p6 n4 i; C% ]voltage, SELV and ELV lighting chains in respect of clause 20.7.6 of the above referenced standards.
8 B+ [" F' s* x6 L/ xThe seems to be a difference between IEC and EN.2 }' v+ P8 V; K3 j% x, s0 D
1/ IEC version standard references tests to 60238 clause 15 on three samples (push in type) clause 15.2
8 C' i' J$ N# G' ~% F E( N$ Wapplies but which force?% \# y+ }- I; ~% z! U" O' {
2/ According to IEC version of the test E5 & E10 lampholder are subjected to a free fall test EN 60068-2-
, m: S) ^# ]% t0 D8 K% Z75. Clause 15.6 suggests a method of test to fix the lampholder to plywood. We have made some8 b& [6 Q6 |8 @: ^# z9 s
different tests by way of experiment in our Laboratory using the spring force impact hammer (better for
) o5 H3 C7 ?' {- P- q5 Vthe test engineer) with the lampholder fixed against plywood and again without the" U7 W6 b! G) X) o3 _
lampholder being fixed at all. We find that when the lampholder is fixed most times the plastic
, \, r+ g% V* U' H- E- olampholder cracks which can result in the live contacts becoming loose within the lampholder. What is
; S* }; D# s2 n% @+ mthe correct test and lampholder support method to make according to IEC?
0 u8 A& B1 t7 j( r/ i: b# M3/ According to EN the test is again referenced to 60238 but is modified by Annex ZB. Its says in annex# n2 q: h/ F! U! b6 ?2 T$ [
ZB the tests don’t apply to E5 but what about push in?
* ?( o# p& f% p) f. [Decision: v/ Z& X7 t, L1 H
1/ 15.2 is not applicable to push in type lampholder. 20.7.13 takes over.
7 Y/ c4 Z6 |0 |2 F7 H; V5 B2/ Pendulum hammer applies to E14 and larger lampholders; E5, E10 and similar small push in type+ l) J2 W. F) r( o. V+ W
lampholders shall fulfil the tumbling barrel test.* y% ]! s! T& W: g E: @) y
3/ Small push in type lampholders are equalised as E5.
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