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4.20 Rough service luminaires – Vibration requirements
% X8 h2 `/ l, P) {, U9 B" ?" N" zRough service luminaires shall have adequate resistance to vibrations.# R" u' w/ z' S! J
Compliance is checked by the following vibration test.
8 X7 M9 r: u1 n3 Y" @8 h' l4 Z( FThe luminaire is fastened in its most onerous but normal position of installation to a vibration# ?2 R' }. {% L7 q" N9 b+ L3 A4 v, Q
generator.+ t! Z6 Y+ e+ v; K$ |2 i3 U
The direction of vibration is in the most onerous direction and the severity is:
8 F; o7 m1 |2 _" W) n+ @9 HDuration: 30 min9 E$ \9 y1 o q+ ?5 s
Amplitude: 0,35 mm' o4 O' a, E3 P$ s* @2 h
Frequency range: 10 Hz, 55 Hz, 10 Hz) V$ ]: y% s- i7 c% \
Sweep rate: approximately one octave per minute.
( h4 q. x1 K* A- F3 QAfter the test the luminaire shall have no loosened parts which could impair the safety. |
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