Emach 250R

[m_c]

So if i connect live to l1, neutral to neutral and earth to earth, on the original, inputs. would i need to disconnect the l2 and l3 ect. or leave as is.
And if instead of the 3 phase output to vacuum pump, if i connected a single phase pump, just to the l1 out on the lr2k0321, would this work.

lr2k0321 below the lc1ko9.

That should work fine.

However you'd have to check the current limits of the LR2K0321, as a single phase pump is likely to need more current, so may exceed the current limit. The worst case scenario is you need change the protection device, and if you go too big on the vacuum, you may even have to upgrade the other contactors.
What you may find is an easier option, is to add another inverter to run a vacuum pump, as 3 phase vacuum pumps will be more common/cheaper.

[Ben-bee]

good idea, great stuff. Thanks for you help M_C, once i get the machine inplace, ill get some pics posted ect.

[ZASto]

As far as I can see from your diagrams, only vacuum pump that is NOT USED is connected to all 3 phases. Everything else is single phase.

Your ears will be delighted :)

[Ben-bee]

Glad to hear this. The machine is a bit of a war horse, looks ugly, performs like a dog, but I love it lol. Glad it can with more tlc move to its new home in my home workshop.