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Discuss what discharge lighting factor to use for hf flurry luminaires? in the Electrical Forum area at ElectriciansForums.net

marconi

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I have been helping out a fellow with his lockdown assignments. One of the questions was about design. There were 60 or so high frequency electronic flurry luminaires each being 58W. The question was to work out the design current.

In the feedback on his first attempt his tutor said he had not taken into account the discharge lighting correction factor which indeed he had not. The question did not tell him what value to use so he came to me for why it was used and what value to assume.

Designing lighting is not in my bag of experience so I did a bit of searching and found an IET thread by some eminent folk which said use a factor of 1.2 for HF flurry luminaires because these have a higher power factor than conventional magnetic ballast flurries. As you know for the latter one uses a discharge lighting factor value of 1.8. I then found a Schneider technical paper which had a figure of 1.2 - 1.4 for HF flurries. So I told him to use 1.2.

The fellow was told by his tutor he should have used 1.8 not 1.2. So it seems I advised him wrongly. What figure would professional electricians have used for this question please?

PS: I don't mind being wrong and we will not be arguing with his tutor.
 
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