2009年3月7日 · Just connect the primaries in a wye, and ground the center of the wye. Make sure the 480 delta transformer is not grounded on the 480 side. This set-up will create a grounded …

2010年9月7日 · There are plenty of 4 wire deltas. They all have a high leg; 208 to neutral/ground for a 240 system, and 416 for a 480 system. It's called delta/wye only because the transformer …

2007年3月15日 · my POCO regulation book qouted say it will only increase the size to match the exsting main breaker of that service it feed anymore bigger will have to convert to wye …

2015年1月21日 · If you have a shared neutral, you could potentially have a "loaded neutral". You could turn one circuit off, but that neutral could be carrying current from other circuits as well. …

2008年4月8日 · Wye vs Delta Thank you both for your information. The tx bank on the pole feeding this service is an ungrounded delta 480 3 pot bank. The new tx will be a 277/480 …

2012年2月21日 · I am taking a skid and temp wirirng taking 120/208 landing on the X's and going to try and get 480v out on the H's. So where I really earn my money is what do I do with the …

2017年7月8日 · Also, a 480 - 120/208 transformer doesn't use the neutral, just the 3 hots. It makes its own 120 neutral. 3 wires in, 4 wires out. If the only loads are 120/208 then it doesn't …

2019年3月7日 · If all you need to do is create a neutral and the existing 480 is not grounded, using 3 transformers connected zig-zag would be less $$$ than a 480∆ - 277/480Y …

2024年8月7日 · Hey, so the company had some 480 delta to 120/208v wye transformers. Theres two jobs we need to go from 208 to 277/480v and was told to hook them up in reverse. One …

2013年10月21日 · Of all the 480 volt delta systems that I have ever installed, or worked on, none have had a neutral tap. That would defeat the main purpose of having a 480 open delta …