Search results

Got finished with work a little early today, so I spent some more time reading over the schematics. I don't believe the difference between 208v and 240v is significant, as 240v is within the normal adjustment range of the VR during normal 3 phase operation. I believe I identified and...

I had hoped for this kind of collaboration...thanks! I had an hour or so to sit down and read the principles of operation for the VR/exciter, and study the schematics. It looks like the VR makes 3 connections to the generator leads; T8, T9, and T12. That gives it 2 separate legs of 120v, and...

I guess it depends on how many things need to be switched over :) I do know what the switch inside of the MEP-002 and -003 looks like (I had to remove, disassemble, and repair one once). It's a nightmare.... On another note, I did manage a few minutes to reset the generator for 3 phase and...

Yep...a 20v droop is very excessive and means that the set can't be used for a situation that varies between zero and full load. A 5kW variance from something like 10kw up to 15kw would be fine, as the voltage would only move 5-6 volts. But the issue still remains. I have a feeling that it is...

Had an hour or so to do some testing tonight. It is about 10 degrees below freezing outside, so for the first time I set up the load bank and generator inside of my closed shop and plumbed the exhaust outdoors. Normally my waste oil furnace does a fine job of keeping the shop warm, but it gets...

The answer is a little complicated... The overloads will trip at 130% rated current (or about 56A, which is 13.4kW). 100% rated current, or 43A, is about 10.3kW. So...the short answer is no, you can only get about 13kW out of it, operating just below the overload trip setpoint. Because of...

Yep! This means that this conversion to 120/240 single phase low zigzag isn't a permanent mod...a person could shut the set down and, in less than 1 minute, reconfigure it back to 120/208 3 phase. I will be playing around with the CT's to allow for 100% load and accurate current readings on...

Here's the video describing the conversion: EDIT: This video has been superseded with another video, describing additional steps necessary for proper meter and VR operation. Available at the end of post #1.

Low zigzag reconfiguration is complete! Just finished a bit of testing tonight; its works as predicted. 120/240v single phase on L1-L3. Voltmeter's other positions become rather useless, but it still works properly when selected to the L1-L3 position. I haven't done any load testing on it...

I have one service wired to L1, L2, L0 and the second service wired to L2, L3, L0. This means that I'm using all 3 phases and I can get close to the rated power out of the genset, but it is never balanced. I tried to set it up so that most of my constant 120v loads were on L1 (house) and L3...

Nope. It works just fine. In fact, the tech manual says it is permissible, provided you don't exceed 100% of rated current on any single phase. My personal setup in my shop and house is ideal, because I am supplying 2 independent services so I can fully load my genset (although it is never...

Yep; my plan is to get 100% of the generator's rated output from L1 and L3 at 120/240v; same as common residential service. This also allows you to get 240v, instead of 208. Wow...missed that one during my searches! The author of that web page did EXACTLY what I was planning to do, with...

Edit: oops! Just realized that question wasn't directed at me...but I'm sure he's doing the same 120/208 setup I am. Dang small screen on my phone! Hey...no problem. It's a legit question! Yep...I have an -004 for backup power for my house and shop. I just pull 120/208 off of 2 separate...

-002's and -003's have a built in switch that allows 120/240 double delta, 120v single phase, or 208/120v 3 phase wye. The re-configuration for these would be more complicated, as all 12 leads go to that enormous switch. My plan would work well for an MEP-004, -005, or -006 and their precise...

So…most of us with 3 phase MEP generator sets have wondered if it is possible to rewire the set for something other than 120/208 or 240/417v. Some have asked the question in the forum here and the consensus seems to be that it won’t work. I think it will. *I am using one of my MEP-004a’s for...