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15 &16 Protection of associated components & Abnormal operation/ c& b' j* [2 q; S, d0 D5 w5 ~1 I+ J
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The ballast shall not impair safety when operated under abnormal conditions at any voltage between 90 % and 110 % of the rated supply voltage., K5 E t: [( N- i+ w5 i
" e& ^$ x8 D3 j. dDuration: 1h$ _: o: O; g" h9 w
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& a& ~* O9 n1 D R3 q. P8 U4 D15.1 verified with dummy cathode resistors inserted and conditions of abnormal operation: g# A! r/ `1 k5 N6 B! n0 d# X# x
. c3 H5 Q& C' y+ R15.2 conditions of abnormal operation, measured from 5 s after the switch on or beginning of the starting process9 n, U0 N9 h; i4 Y
. ?" t/ p- t8 z! k15.3 For a period longer than 30 s after switch-on, or beginning of the starting process. For ballasts which make more than one attempt to start a failed lamp, the combined duration of voltages above the maximum working voltage for which the ballast is declared shall not exceed 30 s.
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c) the lamp does not start although the cathode circuits are intact (de-activated lamp); |
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发表于 2007-12-6 08:32
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