speed Posted November 16, 2005 Report Share Posted November 16, 2005 hi, it seems most of the discussion is about PF relating to motors, but i am wondering about fluorecsent lights. we have a number of buildings on a campus with combined single and 3 phase 208vac. the pf is down at .74 and there is a steep penalty for this. can we install bulk PF correction? does it need to be switched to avoid over correction? thanks for any help you can offer. Link to comment Share on other sites More sharing options...
marke Posted November 16, 2005 Report Share Posted November 16, 2005 Hello speedWelcome to the forum You can bulk correct the displacement component of the power factor only. Fluorecsent lights have a displcement component due to the ballast and a distortion component due to the tube.If electronic ballasts are used, there is only distortion power factor and this can not easily be corrected. I would strongly recommend that detuning reators are used with the bulk correction due to the presence of harmonics from the tubes. Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
speed Posted November 17, 2005 Author Report Share Posted November 17, 2005 thanks for your reply and the information you have provided. i am wondering if you can tell me what range the distortion harmonics caused by the tubes are in. Link to comment Share on other sites More sharing options...
marke Posted November 17, 2005 Report Share Posted November 17, 2005 Hi speed I am sorry, I do not have that information here, maybe someone can help you on this forum. Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
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