Been looking around for a product that meets specification to soft start a single phase fan motor.
5 HP, 3500 RPM, 230 V, 21A nominal, 60 Hz. Currently started DOL but would like to limit inrush to make it easier on standby generator. Current acceleration time is 2-3 seconds estimated.
This...
Folks,
We have found a pattern failure in SE350 AVRs on Marathon generators with 3 cylinder diesels. They appear to be the same as the Basler units listed in the title so wondering if Basler is the manufacturer of all of them.
Units of all different ages and engine brands have done it.
What...
Folks,
I have been tasked to develop some kind of a solution for a problem of an off grid solar/inverter system sustaining repeated lightning damage. Probably to the charge controllers although that is not 100% known to me.
This is a standard off grid system, by standard I mean (have not...
Folks, this question has been in my memory bank for a long time and don't know who to ask but this seems as good a place as any.
On aboveground tanks built for the California market, the fixed liquid level gauge (outage valve) seems to be most commonly set at 86.5%. Some manufacturers (AWT)...
Looked at a facility that has 208Y/120 power throughout.
Their automatic genset is a 120/240 1Φ set that only powers selected circuits.
The way this is accomplished is by interrupting or transferring phases A and B before they hit the subpanel. Phase C is going straight from the...
I work on a lot of small equipment that has similar belt drive alternators from Mitsubishi, Denso, and Hitachi.
From time to time they fail and I need to retrofit one for another or deal with start disconnect circuitry and other things that require me to understand the circuit more than just...
Since the beginning of time thermostats have always been at the cylinder head outlet.
Within the past 15-20 years they seem to be trending to the radiator hose inlet.
To me this seems a little strange. Why do we care to more carefully regulate the water temperature around the cylinders than...
Here is a question that has bugged me for a long time but I never bothered to ask:
Does anyone know why birds do not perch on wires > 21 kV?
There are no 35 kV in this area so I don't know what they think of those.
I know I have never seen them perched on 60 kV or greater unless they are...
I have seen many small 1ph standby gensets with a max unbalanced load capacity figure on the nameplate.
Usually this number is given as 50%.
Some larger ones have a rating of 25% or even 10%.
I am not sure how exactly to apply this number. 10% at what point in the calculation?
I have a possible project to convert a 3 phase Y connected 4 wire generator head to single phase.
I am comfortable with the theory of how everything will work. I plan to break one wire out of the Y-point and bring it up to the connection box so it can be joined to the end of one of the...
I had a case recently where a customer called me out for what sounded like a control problem.
It turned out they had a 3 hp motor with a very heavy blower impeller they were attempting to run off an 8 kW no-name genset wound and regulated in the Honda style. That is DPE to power the AVR and...
I recently came across a generator used for 120 only. I am working on it for an engine vibration problem but discovered they wired it with the unused corner "unbonded" (best term I could think of). As far as I know it has always worked fine electrically.
On any reconnection scheme I have ever...
This should be a rookie question but is there are there two simple formulae that can be used to convert these numbers between each other when the gain of the antenna and feedline loss are known? We use dBm when taking actual measurements with our equipment or predicting whether receivers will...
This could be a long explanation so I will try to keep it simple. 10 kWe genset. Single phase 120/240 output with auxiliary winding for AVR. Brush type field.
Unit intermittently produced power until it didn't. Potted AVR assembly found burned. Tried several spare universal (line powered)...
You guys helped me understand the last one well so here is another I have not seen.
20 kW genset where the data plate says 120/240 single phase only. On looking at the gen head it definitely has 12 leads and they are connected in a 120/240 high leg center tapped delta configuration with load...
I came across an interesting generator configuration that I would like to run by you guys.
It is a 12.5 kW generator set up to deliver 120v only. The windings are just a regular 12 lead but they are connected as a 120v parallel (low) delta, corner grounded.
The scant documentation I have ever...
I prefer to get my test equipment on ebay because I don't make critical measurements and it is more affordable that way.
Right now I am using a good old BK 20 MHz scope but it is big and heavy and needs AC power.
Things I commonly measure are 60 Hz power waveforms, ignition coil primaries, and...
Is there a simple time delay relay on the market that works like a single shot except it can be made to have 3 events? Another way of explaining would be an interval timer that stops after 3 intervals of on time?
The on time would be 10 seconds followed by 30 seconds of off time, nothing...
Hi all,
I have the need to look at some wave forms on incoming phone lines for amplitude and power influence. This is simply measuring the balanced phone line up to about 3 KC. As this is not a common occurrence for our shop we do not want to spend a mint on a differential probe. We just use...
I have what I think is a rather unique application. A VFD running a Copeland scroll compressor, 5 tons, three phase, 208/230 dual voltage. The VFD is oversized, but running from a single phase supply, so I am curious if changing the output voltage to the compressor can vary in any meaningful...
