3 phase electric motors

[Nealy]

I have a 3 phase motor and controls supplied by a 3P+N supply. I need to relocated the cabinet to another area which has only a 3 phase supply. Can I use the motor to to give me that neutral in the new location.

Many thanks, in advance

 

[Taylortwocities]

Your motor is presently configured as a star (3 phase + neutral).

It is simple to change the links so that it runs as a delta (i.e. 3 phases but no neutral) is this 230v per phase? If so
The link set up is shown at the start of this recent topic

//www.diynot.com/forums/electrics/3-phase-motor-wiring.352718/#2653094

 

[Spark123]

I think he means can he derive a neutral from the motor for the control supply? If so then the answer is no. For a start the motor won't be on power so there won't be a neutral there when the control circuit is open, secondly it unbalances the motor phases (but for that amount of current probably wouldn't have mattered).
The options are to either install a 3p+n supply, buy 400v control gear or source a 400v to 230v transformer.
As it sounds like a workplace then you really ought to get an electrician to sort it for you.

 

[Nealy]

Yes Spark123 you are correct. The neutral is needed to control a blow motor for a boiler, but only after the motor is running I'm at odds with my Boss who thinks taking a neutral from the boiler is not a problem. Is there anything I can quote to strengthen my case.

Regards

 

[JohnW2]

The link set up is shown at the start of this recent topic
//www.diynot.com/forums/electrics/3-phase-motor-wiring.352718/#2653094[/QUOTE]
I'm not sure that's a thread of which we can, or should, be proud!!

Kind Regards, John

 

[ricicle]

Can you not take the feed (L+N)for the blower from the boiler (assuming it can take the extra load) Then just use some relays/contactors to do the interconnecting controls from the motor controls (with appropriate labelling if there is multiple circuits in any enclosure) ?

 

[Nealy]

No ricicle. The supply voltage for the boiler comes from a 400-24 transformer. 240v (L & N) is for the blow motor only.

 

[Simon35]

Your motor is presently configured as a star (3 phase + neutral).

It is simple to change the links so that it runs as a delta (i.e. 3 phases but no neutral) is this 230v per phase? If so
The link set up is shown at the start of this recent topic

//www.diynot.com/forums/electrics/3-phase-motor-wiring.352718/#2653094[/QUOTE]

 

[Simon35]

No ricicle. The supply voltage for the boiler comes from a 400-24 transformer. 240v (L & N) is for the blow motor only.

Is the motor 3 phase or single phase...it says 3 phase motor in your OP?

 

[ricicle]

No ricicle. The supply voltage for the boiler comes from a 400-24 transformer. 240v (L & N) is for the blow motor only.

But if you have a N at the boiler panel (which you were originally going to use), you will have a line also that supplies your 400/24 tx. One line and a N = 240 v ?

 

[matt1e]

I'm lost!
why exactly do you need a neutral?
is the blower motor 3ph as ricicle has already asked? if so then the neutral is only for the control circuit, so as has already been posted either

fit a 400/230 transformer in the panel
or convert to 24v control and use the existing 400/24 transformer if its man enough

or else run a neutral into the new position
Matt

 

[crystal ball]

Your motor is presently configured as a star (3 phase + neutral).

It is simple to change the links so that it runs as a delta (i.e. 3 phases but no neutral) is this 230v per phase? If so
The link set up is shown at the start of this recent topic

//www.diynot.com/forums/electrics/3-phase-motor-wiring.352718/#2653094[/QUOTE]

3ph & N motor, new one on me