PDSH 959 Mechanical tests of sealed lighting chains

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IEC61347/UL935镇流器热试验箱

灯具防风罩

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针焰试验机现货

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家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

PDSH 959 * z( E2 i! g- _' N6 W& S

Mechanical tests of sealed lighting chains / ^5 X; P: @/ N

20.7.14 , Q# v: V6 m  H& ?

60598-2-20(ed.3)

Standard(s):
IEC 60598-2-20/2010
5 P9 d0 J7 m1 KSubclause(s): 20.7.14
% O; M1 \0 {4 X1 PNo. Year PDSH 0959 2010
2 ^! S0 j! a; r; \/ s5 E& ]3 c( tCategory: LITE Developed by: ETF5 OSM/LUM
( c4 r% s; m  X8 S9 B8 wSubject:
Mechanical tests of sealed lighting chains
Key words:
- IP classification
6 w8 L! l8 A; {* Y- Cable entry
. o- Z$ D/ W* q1 p4 B- Garden luminaire
" q, V. j5 f0 \: R3 t; ~) n5 [To be approved at the 49th CTL Plenary Meeting, in 2012
Question:
A sealed lighting chain where the end part(s) are fixed by gluing withstands the mechanical test of
9 h0 Y5 B1 [3 J8 A20.7.14 before heating test and endurance test (this is the order which is specified). But when the chain
" L2 B" e: }' Z" Z& h( t8 x, s! Q* Q4 Fstarts to heat during the heating test and the endurance test, the glue might start to melt and cause the end
" i. H) ?- x( L9 a  ^  upart to become loose easily. At the moment our interpretation of 20.7.14 is that only a visual check shall
be carried out without applying any external forces to the end part(s) (moving of chain is allowed).
Because we have found cases where the glue starts to melt at about 50°C, we propose the following:
- immediately after the endurance test duration at the same temperature, mechanical tests of § 20.7.14
, j+ j: e: R( B(without the additional test) shall be carried out but only once for 1 minute (not 45 times); or
- end part(s) of a separate test sample shall be subjected to heating in an oven with a temperature as
measured temperature of the end part(s) in the heating test of normal operation + 20°C for 240 h.
# _. ?6 R/ c1 w* U- QImmediately after 240 h, the end part(s) shall be subjected to the mechanical tests of § 20.7.14 (without
: J7 b+ M" g! s8 B2 }+ xthe additional test) shall be carried out but only once for 1minute (not 45 times).
6 m8 ^0 f$ q2 p: n. DDecision:
" P- J* z. w3 u: f, y6 o* b8 ?The fixing of the end part on the tube shall be visually inspected after the endurance test.

% _1 @' t# M3 Q7 v" U. {
. N6 k; c- F" }