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Probably best to start a new topic on this...as it doesn't really pertain to the main breaker issue But the most likely culprit on an -003a is a bad VR board.

My shop compressor is also an industrial 2 stage unit with a 5HP 1800 RPM Baldor motor (NOT one of those phoney 5HP "peak" 3600 RPM motors you see on the cheap compressors). It draws about 23 running amps. An -003a starts it just fine, even while supplying a small amount other shop loads...

I agree this is a pretty good solution; I have completed a few projects with VFD's and they work quite well for speed control and soft starting motors. 3 phase models are typically a lot cheaper than dedicated single phase ones (at least when you're buying them used off of ebay) and nearly...

I didn't; I sold every one of my MEP's except for a single -002a. Even sold the bedliner spray trailer that I built with an -003a as the power source! Work has kept me pretty busy the last 6 months or so, but when I get a few more MEP's in my shop I'll continue to tinker with and tweak them...

This was kind of my point in starting this thread; I, too think that the engine and generator should be capable of starting a 10HP motor, especially a 3 phase one. The OL system that is built into a generator should be restrictive enough to prevent damaging the generator, engine, and the loads...

I agree with you on this; these reading were lower than I expected. Here were my thoughts on this: 1. The generator's breaker is tripping before the VR has the chance to recover from the initial surge, causing the voltage to drop rapidly and limiting the peak current sent to the motor 2. My...

I did get a few minutes last week to play with it; I only got the chance to work with one of my -003's, so not sure yet on the -002's or my other -003. But, here is what I did: Checked the setting on R3, it was perfect Hooked up a large load (10HP 3 phase motor) and started it a few times on...

I decided to wait until I could get my hands on a good clamp ammeter; I wanted as much info as I could get before I started playing with R3. I just picked up a used Fluke 337 off of Ebay; got it in the mail a few days ago. It has the ability mt record min, max, and peak inrush currents. I'm...

Not at all! I'm an ex-Navy Nuclear Electronics Technician; I have a good solid understanding of electronics. I appreciate the help and the time you took to ask the engineer at Heinemann about this issue. I was going to try to figure most of this out on my own...you've probably saved at least...

Speddmon, I am going to dive into this on Saturday morning and get some data on how R3 affects trip delay and setpoint, but I just wanted to make sure I fully understand how this breaker works before I start making adjustments. So, I just wanted to try to clarify a few things: 1. The magnetic...

Thanks for the effort! I had planned on taking some time this weekend studying the schematic to try to figure this out on my own... I'll take 1 of my -002's and one of my -003's and check the R-3 setting, adjust if necessary, and see if any of them are out of spec. If this doesn't solve my...

I haven't done the R3 adjustment procedure; I have experienced the same problem on literally over a dozen sets over the last year or two...so I am assuming that it is more of a design issue with the breaker than an adjustment issue. My thought was that if I could fudge up on the setting a...

I don't have a clamp ammeter...its something that I should add to my toolbox. I do have an older oscilloscope and several good DVOM's (but none are data logging). So, I haven't monitored the current on the loads yet... Both sets start smaller motor loads; portable air compressors, my cement...

I have been tinkering these sets for a few years; I currently have three -002A's and two -003A's in my shop. I have noticed what I believe is a design problem common to all of the machines, and I'm wondering if anybody has insight or has gone down this path before... The main breaker seems to...