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| PDSH 9598 x7 J7 L5 q& P/ @
! E) [; T) ?% i- X2 w; y5 Z4 g O | Mechanical tests of sealed lighting chains
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| 60598-2-20(ed.3)
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Standard(s):: y0 R* ?: Y1 { h6 F6 x) `; n
IEC 60598-2-20/2010" l" F: E, s. Z* S7 s/ Z- ^, h
Subclause(s): 20.7.14
5 R8 K. e( H/ H2 d2 z8 e c: D: A3 i, mNo. Year PDSH 0959 2010$ z1 O# V0 X( w# M4 G8 ^' Q
Category: LITE Developed by: ETF5 OSM/LUM
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Mechanical tests of sealed lighting chains
" r6 R: R+ z4 j. uKey words:
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- Cable entry
, P; F5 [- t( ~; n+ e7 T2 H7 W8 a- Garden luminaire8 M' B8 Y8 f* N$ K
To be approved at the 49th CTL Plenary Meeting, in 20128 t! N+ u0 P ~5 ^
Question:
2 x8 T* t; Q- oA sealed lighting chain where the end part(s) are fixed by gluing withstands the mechanical test of
4 {0 r5 c g3 v9 @, ?6 T, g20.7.14 before heating test and endurance test (this is the order which is specified). But when the chain! L2 Q8 R; d7 S& j4 u. E5 l
starts to heat during the heating test and the endurance test, the glue might start to melt and cause the end
! f" f6 S$ A% Q. lpart to become loose easily. At the moment our interpretation of 20.7.14 is that only a visual check shall
1 D' N. g3 X( _/ p8 G I4 abe carried out without applying any external forces to the end part(s) (moving of chain is allowed).& G1 [: X, {3 G) M/ k0 ^# l. P, k
Because we have found cases where the glue starts to melt at about 50°C, we propose the following:' }5 y$ Z2 J( g. d5 T/ F6 k) T
- immediately after the endurance test duration at the same temperature, mechanical tests of § 20.7.14
8 O( I3 Y' t2 u8 ?(without the additional test) shall be carried out but only once for 1 minute (not 45 times); or# y& e1 T5 W9 c* v; e- @( _
- end part(s) of a separate test sample shall be subjected to heating in an oven with a temperature as* U9 O; ?7 \" D$ \
measured temperature of the end part(s) in the heating test of normal operation + 20°C for 240 h.6 }3 f# H* V0 r3 ?; H- H
Immediately after 240 h, the end part(s) shall be subjected to the mechanical tests of § 20.7.14 (without
: O2 C- L) v0 I) Z% n+ O4 O4 B1 G0 ~the additional test) shall be carried out but only once for 1minute (not 45 times).
8 E, x$ B3 s K; H8 [6 E6 c" Z0 V" \Decision:7 b) a- u; H: S" {" L+ F
The fixing of the end part on the tube shall be visually inspected after the endurance test.
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