3 Phase Drill Star to Delta

[andeep]

Hi there,

I have a 3 phase elliott drill that I want to convert from star to delta so I can run it off an inverter.

Can any sparkies tell me how to wire the motor:

Also any recommendations for a good inverter?

Thanks

 

[wheresmejumper]

You need to remove the brown plate, to expose 6 wires leading to windings
then meter them, as they will be be in 3 pairs.
then connect the pairs together, and bring a live/phase to each pair

 

[andeep]

I took a multimeter to it after removing the jumpers and these are the pairs that I found continuity between:

1-5
2-4
3-6

1 and 6 are the bottom left and right pins, respectively

 

[rtbcomp]

Looks to me like the 6 wires are connected to those terminals. I'd remove the mains lead and those brass links and then do a resistance check across the terminals before taking anything to bits.

EDIT - beat me to it!

 

[piman]

Hello Andeep,

looking at the link sizes, I would say strap 2 and 3, 4 and 5 and across the bottom (1 and 6?). As a precaution, I would ring out the windings with the straps removed?

I can't help regarding inverter makes, I've used one from Drives Direct and also a Telemechanique one, no issues with either.

Alec

 

[rtbcomp]

Connect 1-2, 4-6 and 3-5 (for example) and connect the phases to 1,4 & 3. If the motor turns the wrong way reverse one of the windings to give

1-3, 4-6 and 2-5 (for example)

EDIT Piman's scheme would be easier to implement

 

[piman]

Hello Andeep,

your terminal pairings confirms what I said about link placement.

Alec