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4.20 Rough service luminaires – Vibration requirements5 W2 R a. R e; w0 h' \
Rough service luminaires shall have adequate resistance to vibrations.
7 s& s* e9 X% r* f$ U: ^6 e6 c+ h) {- }Compliance is checked by the following vibration test.9 U x' p2 d6 k G
The luminaire is fastened in its most onerous but normal position of installation to a vibration! d- C8 d! O5 N& q( d
generator.. {# K* O0 m! q- n k; `! [. k
The direction of vibration is in the most onerous direction and the severity is:
, B' M7 `: P. m8 t! lDuration: 30 min9 q) p o {. l* K F
Amplitude: 0,35 mm; m0 T9 z* ?! n0 j
Frequency range: 10 Hz, 55 Hz, 10 Hz! r: g7 ]* n! A
Sweep rate: approximately one octave per minute.
: t) _* S" o& J( X8 A0 H7 KAfter the test the luminaire shall have no loosened parts which could impair the safety. |
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