Onoff

TFFT! ? You had me panicked I'd been testing things wrong for 40 years! I'll measure all the caps tomorrow if I can. The converter unfortunately is 6' up in the air on a shelf above a donkey saw. I had to balance on the saw earlier. Yep, I'll discharge the caps!

I know. Fully aware but it should only be 230 not 400.

You haven't answered my question. I'm taking it you think it normal to see 400V phase to neutral or phase to earth. Sorry, I must be missing something! I've always worked on this:

It's been running and still runs, all different 3P machines. Mill, pillar drill, donkey saw etc.

Thanks, but again it's always been 400V between phases, 230V phase to neutral or phase to earth. Sorry, I don't understand you saying 400V phase to neutral or phase to earth is normal.

I'll have a crack at drawing the circuit out

? Whenever I measure a 3P supply I look for 400V between any two phases then 230V any phase to neutral or any phase to earth. How do you reckon some of these machines are starting with phase 3 down?

Do you think a duff cap(s) could be why I'm getting this unexpected 430V to earth? Debating dropping any control voltage to either 42 or 48V. I've 400v trannies to do both.

A few random pics inside the phase converter. Bfo trannie in there and lots of caps. Incoming L&N appear to go to the transformer and take 230V up to ""415" out on the brown. Across the red and black to the transformer 230V. Out on the brown 430V. Measuring from a wall socket between N or E to the phase converter outputs. One phase to E or N. Circa 400V. Other two phases to E or N at the socket, zero volts.

MCS certified is he?

I ran the pillar drill that starts fine. Readings: OFF. FWD REV R1- S2 430 430 390 S2 - T3 430 430 430 R1 - T3 0 450 460 R1- E 0 450 460 S2 - E 430 430 435 T3 - E 0 0 0

Transistorised with lots of caps in there I think.

2 pack epoxy will be fine imo but vacuum the floor really well first to get all the loose and dust off.

Just been back... sober... Definitely between one phase to earth I'm getting 430VAC: Where the phase converter connects to the commando socket: JB at the back of the lathe: Took the lathe out of the equation and checked again. Same results. Said he's never changed the lead on the converter. As much as anything it's a case of redoing terminations, sleeving/marking and tidying as I go.

How does the boost button on a phase converter work anyone? Brings other caps in? The above results suggest I've lost a phase. It won't start on the fwd/rev switch but will get going if you press the boost button. Now I know a 3P motor shouldn't start with just two "real" phases present but will run albeit a bit crap on 2 once it's turning. Wondering if the boost does something odd to start it turning. First thing is to check the voltages properly. Hoping to have another look this weekend.

Just one sucker on his own fitted my windows...

With even 300mm of EPS under the floor in a passive esque build I seem to recall you still lose like 8% of your heat down through the floor. I've dug out one room so far and built back up with 150mm pir + 25mm eps underneath. With hindsight I'd have dug deeper and put more insulation in.

.....and an integrated Bosch fridge! ?

Bit pricey a single to 3-phase vsd for this as it is. The motor I don't believe is dual voltage so doesn't offer the option to run 220v delta. Pity as single phase 220 to three phase 220 are comparatively cheap.

Vacuum kombi sucker on a crane or robot arm? @craig will be along shortly I'm sure.

I've got a freebie integrated Bosch fridge. Was thinking about cutting the front out with my Fakita grinder and fitting some walk on glazing. ?

The phase converter in question:

More tempting than you know at the moment... ?

Just spent 10 minutes at the lathe owners with the voltmeter. Turned the phase converter on. Left the lathe off. L1 to L2 - 430V L2 to L3 - 430V L1 to L3 - 0V L1 to earth - 0V L2 to earth (machine body) - 430V ? L3 to earth - 0V He did say he may have wired it wrong... Didn't go any further as just finished a Marston's Pedigree.

Pallets? ?