Hello All,
I would like to put the topic of series voltage drop in various types of three phase wiring arrangements for roadway lighting to rest. I have always had to look into this to get the right methodology, and I would like to get confirmation or explanation as to if my set up for the 4 different type of wiring methods and the associated formulas I have come across are correct or why they are not correct.
In the four arrangements I have a 480V/277V three phase system, in the different arrangements I explore the notion of currents canceling the neutral thus reducing voltage drop etc. I look at single phase across lines and single phase to neutral. When looking to do the series voltage drop for roadway lighting applications I look to use the correct formula, ie: VD=2*I*Z(effective)*L(oneway) or VD=1.732*I*Z(effective)*L(oneway)
Please look at the attached two pdfs for the wiring methods further explained and associated formulas listed.
I would like to put the topic of series voltage drop in various types of three phase wiring arrangements for roadway lighting to rest. I have always had to look into this to get the right methodology, and I would like to get confirmation or explanation as to if my set up for the 4 different type of wiring methods and the associated formulas I have come across are correct or why they are not correct.
In the four arrangements I have a 480V/277V three phase system, in the different arrangements I explore the notion of currents canceling the neutral thus reducing voltage drop etc. I look at single phase across lines and single phase to neutral. When looking to do the series voltage drop for roadway lighting applications I look to use the correct formula, ie: VD=2*I*Z(effective)*L(oneway) or VD=1.732*I*Z(effective)*L(oneway)
Please look at the attached two pdfs for the wiring methods further explained and associated formulas listed.