slim_boy_fat
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Just climb the pole with a handful of crocodile clips.
View attachment 151065
R.I.P. Jack
Just climb the pole with a handful of crocodile clips.
View attachment 151065
That would explain the ground spikes in the field.Grounding on the 11kv lines to allow safe working just in case it becomes reenergized.
and across the phases as wellThat would explain the ground spikes in the field.
Suggest to them you require the cable over your property to be laid underground this is something they have to do, (they have 12 months to do it) you can then make a another suggestion
even though the pole is on my land.
but it just feeds his property
No been offered a few 3 phase tools for FREE so just wondering what it would cost me if I wanted to take them and be able To use them but it seems all a bit expensive. So may just invest in a rotary converterThis doesn’t tie in with the pillar drill saga by any chance does it?
No been offered a few 3 phase tools for FREE so just wondering what it would cost me if I wanted to take them and be able To use them but it seems all a bit expensive. So may just invest in a rotary converter
Some are weldersOr re-motor?
Some are welders
So why not say to begin with? Welders do not like vfds nor do they like rotaries. The changing voltage messes up the rectifier and damages the welder. Your threads are all very obscure and could easily not be with a few pics and a good description to start with.
An inverter welder also starts by rectifying the incoming mains, I wonder if you could modify one to run on the VFD's DC rail?Depends on the welder, VFDs are not a good match to any welder, but an inverter welder should cope with a rotary convertor easily (appears to work for me) or maybe a VFD if it's decently designed. All an inverter welder is, simplifying grossly, is a rectifier charging the reservoir capacitors (which isn't bothered by the incoming frequency or waveshape if it's well-designed and will always pick the best of the three phases thanks to the diode bridge) to provide a few hundred volts of DC then what amounts to one leg of a VFD (a switched-mode power supply) through an isolating transformer and onwards to the meaty circuitry to control current/polarity/waveshape etc.
I can see a transformer welder Not Liking It At All though, as a VFD output's a series of on/off pulses several tens of thousands times per minute at 700 v or so that average out to a sine wave(ish) over 50 - 150 pulses per cycle and that ain't going to pass through a hefty transformer due to the primary's inductance (and the inductance would induce huge spikes on the edges of the pulses and fry the VFD output transistors in the process). A rotary might work OK, it at least provides a proper sine wave to the transformer - depends which two legs you use, would want to steer clear of the generated leg - and if all it needs is 415v on the input, it's probably easier to put a forking great transformer upstream?
Dave H. (the other one)
An inverter welder also starts by rectifying the incoming mains, I wonder if you could modify one to run on the VFD's DC rail?
Definitely not suggesting that as a solution to Jack's problem though, just an interesting thought. I'd probably just say no to the welder or sell it on and get a single phase one.