3 phase supply no neutral how do i get neutral for the contactor coil??

[aldomack]

Hi I wander if anyone can help?

I have just wired up 2 3 phase motors on a Farm for a Auger System, I have ran in a 3 phase supply from a nearby J.B. There is only 3 phase wires and the outer armour of the cable connected to the body of the box as the earth on the J.B. I have run these into the Control box for the Auger and connected the earths up and the Phaes L1,L2,L3. These are going into the top of the breaker, BENEDIKT JAGER K2-09A. There is connections for the contactor coil A1 and A2, I require a neutral for the coil to work but how do I get this when there is none on the supply I have run??? hmmm I'm stuck

 

[Guest123]

Are you sure it isn't a 400V coil???

 

[aldomack]

So could I just run a neutral from another JB????

 

[aldomack]

No mate not a 400v coil

 

[Pat Tester]

Change the existing contactor coil to a 415v coil. Are you using a DOL starter ? or just an isolator to control it ?

 

[Guest123]

No mate not a 400v coil

Can you not change it for one then???

 

[aldomack]

I think it is a DOL starter? Not too sure to be honest. 2 mins, I am gonna attach some pics of the control box

 

[aldomack]

please see attachment

 

[Hawk81]

I think it is a DOL starter? Not too sure to be honest. 2 mins, I am gonna attach some pics of the control box

If you have already brought cables to this and part wired it how can you not be sure if it is a DOL starter?? Easiest way would be to change the coil to a 400v coil.

 

[Hawk81]

please see attachment
View attachment 4820

Anymore pics from staight on view?

 

[Hawk81]

So could I just run a neutral from another JB????

No this would be borrowing a neutral.

 

[aldomack]

Here are somre more photos, the incomming supply comes in from the left and into the top of the right contactor, the 2 contactors are linked at the top. The Motors are fed from out the bottom of the contactors,

 

[aldomack]

So if I get 400 v coils, I would not require the neutral?

 

[Hawk81]

So if I get 400 v coils, I would not require the neutral?

Correct. 2 phases will work the coil

 

[lewlec]

hi

normally on auger systems there are some sort of stop sensor or switch, not sure if you have this sort of set up but if so make sure that it is rated at 400v if using a 400v coil

regards
gary