Guy's got a 3 phase euro power supply for a bizarre machine that requires 360~400V and all he's got now is 480V. I was thinking that since this is only about a 17% difference some buck/boost magic might work. But alas, i'm not seeing it.
About 30A output is needed.
Any suggestions?
Keith...
Have a 30hp pump down a 10 inch well bore. There's a leaky plug on the seal cap. Of course starting the pump you get some serious sucking thru the leak you can hear, several feet away, as the water level drops. Then when the pump stops we get a bunch of air coming out the leak as the well...
Does anyone have any experience with putting in an owned transformer directly fed by a PG&E primary service (24kV)?
What would be the typical process for doing this?
Keith Cress
kcress - http://www.flaminsystems.com
Hi, does anyone have the rundown on using a VFD'd motor in a lathe?
We've put a 5hp VFD specific motor into a Monach lathe. The original motor was a DC motor run by tubes! This was later swapped out for SCRs in a DC controller in the 80's. That's crapped-out just like the company that made it...
I have a cooling system as seen below that runs water/ethylene glycol mix to cool 13 zones via solenoids.
The pump charges a manifold that the zones draw from. Since temp controllers run the valves none can be open or most of them can be open. All of them are never open though perhaps half...
I setup a control system for a customer with some heating and a 3HP VFD to run a 2HP motor.
This is that accursed chocolate curtain thing probably mentioned elsewhere here. It's a prototype that's having severe teething problems. The customer had to change pumps from a 2" to 3" positive...
The Starter has this nonsensical schematic showing two different wire schemes at N2 and N1.
Then the manual on the DF website shows this:
Which doesn't make much sense to me.
The unit did apparently come with a red jumper between N1 and N2.
Nothing tried seemed to work.
Does anyone KNOW...
I have a process running with the following thermal cooling needs:
Presently they're using city water thru a garden hose which is where they got the temp in and out and flow.
Does this look correct?
Tons, aren't those a unit over 24hrs?
Do I recall correctly that 1 Ton is about 1...
In sizing primary side protection for a transformer I'm seeing that if this transformer is in a power application the maximum protection allowed is 300% over the full load primary current. Fine.
But then NEC goes on to say if it's used in a control application the maximum primary protection...
I have to connect sixteen 2AWG cables probably with lugs with 5/16" or 3/8" holes unless someone has a lugless solution.
These batteries have odd terminals that are 0.560" in diameter and about 2" long.
I need a 200Amp connection between the cable and the battery terminal.
Some sort of split...
Hi, I'm working on a large extruder.
It's a 150HP twin screw job with about twenty modules. Each module is electrically heated with 2 to 4kW of electrical heater. The drive is also adding 150HP of shearing heat.
Each module has a PID running its temperature control. The PID runs the...
I'd like to use a 15kVA an isolation transformer as an autotransformer to generate a neutral from a 240V source so I can run classic 120-N-120 loads.
Can I use a transformer with a 240/240 side? Seems I should be able to. Drawbacks?
Keith Cress
kcress - http://www.flaminsystems.com
From the thread thread237-489913 I got the extruder fired up.
We have 83kW available. Motor is 123kW. I preheated the extruder chain using 35kW. Once the old stuff was heated up enough and 90% of the heaters were off, started the dual screw extruder at 5RPM. It ran! We successfully ran all...
Yeah yeah I got the fuse at the top than can be repaired with a penny..
Those things at the bottom?
This panel is controlling a 240V water heater... with the one screw in fuse.
Keith Cress
kcress - http://www.flaminsystems.com
I have to modify an industrial humidifier, really just a electro-mechanical atomizer.
It's made of some-sort of stainless steel. I have to drill twenty 6mm holes and twenty 13mm holes.
This is 0.042in sheetmetal. I was thinking of getting a piece lasered out with all those holes then...
I'm assisting a small start-up company. They failed to give proper consideration to the power demands of a 160HP extruder. It's driven by a BIG Schneider VFD.
They're working on getting 480V service brought in but in typical PG&E service land it may take a year or more to happen. They're...
I'm faced with mounting a bunch of 300 pound enclosures on cinder-block walls. I'm looking at a bunch of so called "fasteners" but have little confidence in what I'm seeing as a lot of it is probably marketing BS.
Does anyone have something they actually trust to stick enclosures and Unistrut...
I've got a 15HP 575V motor that's lost it's country finding itself wandering in 460V land.
I want to replace it with a 460V unit.
I see that it's a Chassis/Frame 254T.
I'm not all that clued-in to exactly what 254T relates to in detail.
What else should I be watching out for?
Shaft length...
I'm going in circles here.
This is what the maker describes but how does this distill into hardware?
The drive draws 48A. Wire size 125% x 48A = 60A
That's a 30,60,100 disconnect.
But then they state a 75A breaker. I'd expect the breaker would be in the main panel. But, It's going to...
