Does the same 4 leg configuration help eliminate the Harmonics issue in older buildings that have had a lot of upgrades to newer equipment (like electronic balasts and computors) ?
Does the same 4 leg configuration help eliminate the Harmonics issue in older buildings that have had a lot of upgrades to newer equipment (like electronic balasts and computors) ?
I've never been critical of my engineers or plant staff as I have been there myself. As it goes you point your finger at others and you will have 4 pointing back at yourself.
Having a 4 or 5 legged core does not help with harmonics. Remember that in a common D-Y and D-D that the magnetic flux flowing in the core flows through the coils and is contained there. As shown in the diagram when you wind and connect the coils in a Y-Y you end up with magnetic flux that wants to circulate outside of the core and involve anything that is magnetic in that area. Harmonics really doesn't get involved in this. I am not an expert of core and coil design but have an appreciation of what it involves. I know that the engineers plkay close attention to coil designs because of the heating affects of harmonics and I'm aware that the clamping components of the core are also considered but where I worked clamping design dodn't appear to be a factor in a K-factor transformer just the type of core laminate material on order to optimize the core design, core losses, etc.
