[GM1G]

To GM1G lets keep everything in the post so the info can help others. Lets start from the main panel your main power cable. (Question) It should have 3 wires plus a ground if your wanting to use 240v and 120v to your control cabinet. as far as wiring schematic for logic and main rectifier power on the drives DMM's schematic is correct so follow it. Anything in your control that has a nuetral for 120v should not loop to a ground anywhere. example disconnect your main incoming power cable. now using a multimeter put it on impedance/ohms put a probe on the main ground wire or cabinet as this should be. Now put the other probe on a nuetral that is used for 120v and test all the neutrals if any of them show a connection bad things can happen!


I did do a test last night as far as mixing the 2 voltages. This is bad it did create a loop to ground from the neutral to the rectifier(main power to drive) so do not mix. use 240v on both. benefit optimum performance from drive n motor
FYI my 240v measures 248volt some Drive internals have a max rating that I see of 300v
I'll wait for a reply.

what size wires are you supplying the rectifier side of the drives with?

[LtDan]

what size wires are you supplying the rectifier side of the drives with?

How far is the run of wire from the main source?
Mine is 60ft so from main panel to control box outlet is 8awg in the box is 12awg all depends on amp draw and voltage drop.
There are plenty of calculators online to calculate this.

[GM1G]

How far is the run of wire from the main source?
Mine is 60ft so from main panel to control box outlet is 8awg in the box is 12awg all depends on amp draw and voltage drop.
There are plenty of calculators online to calculate this.

i was gona run #10/4 about 30 feet then #12's split to the drives

[LtDan]

Add all your amperage and then use a calculator. if your using 3 750w drives and a 2hp minimum motor i would run the 8awg

[GM1G]

Add all your amperage and then use a calculator. if your using 3 750w drives and a 2hp minimum motor i would run the 8awg

this run will be just for the 3 drives and 3 750w servos

the vfd is on a separate circuit

[LtDan]

Well its been awhile, so hows your project going?

[GM1G]

Well its been awhile, so hows your project going?

after a lot of procrastination as far as buying conduit and wire

i finally did and was running and hanging it today

ive had my replacement drives and motors back from dmm for a few months now

so im working on it