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Anyone in Hampshire with 3ph power available this weekend?

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KingAether

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This is a big ask, i know, but Is there anyone in Hampshire (or the very east of dorset) that has 3-phase in there garage, warehouse, etc that would be free and willing Saturday afternoon to let me pass-by and test a machine/motor?
Im picking up a new saw, assuredly it works but i'd like to know 100% before i buy a vfd instead of a 1ph motor; a socket near a door that could be backed up to by a transit would be ideal to save taking it apart in transit or having to unload a 1/2 ton but beggars can't be choosers.
Thank you in advance to anyone that can help!
 

Ttrees

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What do ye guys think about doing an insulation resistance test with a cheap multimeter like what this guys doing ? (albeit he's using a trusted Fluke brand)
I just bought one from Aldi, although I don't believe the special buys are on the same time.
Here is a video using a multimeter to test, which is not in Hindi.

From what little I believe, as long as the cable is not damaged, a VFD will be able to fault find any problems with the motor.
Curious to know
Thanks
 

sunnybob

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Cheap multimeters are very useful. But it depends how accurate you want your answers to be. If youre measuring to a required number, cheap testers are likely to be a few or even several decimal places out from a more expensive calibrated unit.
 

guineafowl21

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What do ye guys think about doing an insulation resistance test with a cheap multimeter like what this guys doing ? (albeit he's using a trusted Fluke brand)
I just bought one from Aldi, although I don't believe the special buys are on the same time.
Here is a video using a multimeter to test, which is not in Hindi.

From what little I believe, as long as the cable is not damaged, a VFD will be able to fault find any problems with the motor.
Curious to know
Thanks
He’s just doing a basic low-voltage continuity test. It will establish that the coils are the same resistance, and that there are no major shorts to earth.

A proper insulation resistance test requires 500V, not the 6V or so of a typical multimeter. Thinking of voltage as pressure, it’s like blowing up a tyre to 0.5psi (instead of 40), seeing no leak and calling it good.

A better test would also involve separating the coil wires and checking IR between the coils, as well as from each coil to earth.
 

KingAether

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Hadn't considered using a multimeter, i thought they would just be good for 110/240v, im not too well versed in electrical work but do have a few around the house. I imagine it will work 100% but there is always that chance its died though i doubt it. Ill see what i can do with the multimeter and go from there. Thank you
 

guineafowl21

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If it’s in a van, why not pop it round to your friendly local electrician? He can ‘megger’ (insulation test) it for you in a few minutes. Better than plugging it in and seeing what happens.

If you want help speccing a VFD for it, post a pic of the motor rating plate and connector box.

Note that not all 3ph motors can be run on standard VFDs.
 
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KingAether

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No need now, just been let down last minute Payment made in advance and courier booked for the morning to collec a bgs 12".. Just had the money returned as the guys boss, supposedly, rented the place out machines included and he was unaware at the time of sale... From ebay.. Very ******* off. Rant over
 

HappyHacker

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Breech of contract spring to mind. You should get your costs repaid as a minimum. I would suspect they have received a better offer.
 

KingAether

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Breech of contract spring to mind. You should get your costs repaid as a minimum. I would suspect they have received a better offer.
I imagine so, though a bunch of other auctions came down too so its possible. I'm keeping hope the guy renting the space doesn't need its use as its not a woodshop, but a car place, but i won't hold my breath 💀😂
 

guineafowl21

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No need now, just been let down last minute Payment made in advance and courier booked for the morning to collec a bgs 12".. Just had the money returned as the guys boss, supposedly, rented the place out machines included and he was unaware at the time of sale... From ebay.. Very ******* off. Rant over
Sods. I’ve just had an ebay sale go wrong as the buyer was a chancer, so I know what you mean.


Interesting discussion, though!
 
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