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Teach me - Floodlights!
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<blockquote data-quote="sellers" data-source="post: 78592" data-attributes="member: 2357"><p>ok, so been doing a job re-lamping, replacing damaged ballasts and ignitors on a local floodlit sports centre. The jobs fine replacing like for like except winching down the towers is starting to get to my back.</p><p></p><p>Anyway I just wondered if anyone could explain the setup within these lamp-posts as I did ask quite an experienced guy at work and he hadn't seen it before either.</p><p></p><p>Take one lamppost with 6 x 2000w SON HQI-T floodlights on.</p><p></p><p>The incoming is 4 3phase swa's. No neutrals. Each one to an 3 phase isolator (4 again). This then splits up into 6x2 phase 45a MCB's. (Never really seen a 2 phase mcb)</p><p></p><p>Out of these the 2 phases then go throught the ballast, ignitior (with a capacitor tapped off it) then upto the light.</p><p></p><p>My questions are, how do you have 2 phases on a lamp. No neutrals, etc. Just after a bit of indepth information really.</p><p></p><p> O)</p></blockquote><p></p>
[QUOTE="sellers, post: 78592, member: 2357"] ok, so been doing a job re-lamping, replacing damaged ballasts and ignitors on a local floodlit sports centre. The jobs fine replacing like for like except winching down the towers is starting to get to my back. Anyway I just wondered if anyone could explain the setup within these lamp-posts as I did ask quite an experienced guy at work and he hadn't seen it before either. Take one lamppost with 6 x 2000w SON HQI-T floodlights on. The incoming is 4 3phase swa's. No neutrals. Each one to an 3 phase isolator (4 again). This then splits up into 6x2 phase 45a MCB's. (Never really seen a 2 phase mcb) Out of these the 2 phases then go throught the ballast, ignitior (with a capacitor tapped off it) then upto the light. My questions are, how do you have 2 phases on a lamp. No neutrals, etc. Just after a bit of indepth information really. O) [/QUOTE]
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Teach me - Floodlights!
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