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Manufacturer three said wye-wye and the first manufacturer that previously seemed to recommend the auto now agrees. Looks like that’s what we’ll specify.

Waross, My local utility still bases its billing on "average" power factor. kVAh is not and never was directly measured. Some trig is applied to the kWh and kvarh to derive the average pf. Traditionally, two kWh electro-mechanical meters were used, one being fed from a reactiformer that...

REA is now RUS. https://www.rd.usda.gov/resources/regulations/bulletins Expand the electric portion.

Why just look at project2025? Suggest looking at project2018 to see what the future holds.

scottf, Where do you connect H2 of that 2400/4160Y V PT?

I suppose the external links SEIA are biased as well? The gridinfo.com link claims crystalline silicon. Of course Mr. Wide Awake provided no backup at all to his assertions. If you like Wikipedia:

Good thing we have X to provide the unbiased truth about what's in the panels. Just can't trust those lying manufacturer members of the trade association.

SEIA-why-you-dont-need-worry-about-broken-solar-panels

With a bit of help from Google Translate: Is this residential or industrial use? I own a number of adapters I use for overseas travel. None of them change voltage or frequency, they simply adapt the blades so they fit. The UL devices I'm adapting of course need to be rated to allow a range of...

Sodium (liquid metal) cooled reactors are not new. I worked at Fermi I the summer of '75 during the decommissioning. The coolant had been put into barrels and sealed while it was still too hot. The gaskets melted and some of the sodium leaked and reacted with the air. My job was to remove and...

The 33kV neutral definitely shifts. I see the full 33 kV line to line voltage line to ground on the un-faulted phases with a bolted fault. This overvoltage does not show up on the 400 V side. Tried various fault impedances as well as inserting some non-zero values in the transformer ground, but...

I had thought the distance might add some impedance that would shift the neutral causing overvoltage in un-faulted phases. A simple model in Oneliner says otherwise. I only see voltage sags on the 400 V side.

So far I have recommendations from two manufacturers. Both agree a stabilizing tertiary is needed. One manufacturer says the auto will be more efficient, lighter, and smaller. The other says the auto will have lower impedance and less capability to handle short circuits. I question the impedance...

The SLG does not show fault locations or distances. Please share the distance from a typical fault location and the zig-zag ground.

Is the fault location physically distant from the zig-zag ground?

I see the government claims the Limitation of Liability Act of 1851 does not apply here. Should be interesting.

Another vote for stainless screws and sealant. Most steel screws are simply plated, but even proper hot dip galvanized screws don't hold up well in the salt. Unless your washers are shoulder style, you are not galvanically isolated from the aluminum (It's not aluminium there?). The salt water...

Arp32, Not much to go on. I expect the zero in the kW column simply means this is not a demand customer. Take the kWh and divide by the number of hours since the last read, and you will have the average kW for that time period, with no information regarding the mins and maxes. As Cranky...

YKC, Different single-phase loads doesn't cause current unbalance, they are current unbalance. If the current unbalance is sufficient to cause voltage unbalance of 3% or more, I would look at re-balancing. Losses are a problem only if the solution is less costly. Put some costs on the losses...

It seems we've narrowed the unbalance question down to current unbalance. Current unbalance alone is not a problem requiring a solution. Is the current unbalance causing voltage unbalance or excessive losses? You may get better answers here if can express the real problem you and your manager...