Connection of tyre machine.

[jktelectrical]

Hi.

I have been to a garage yesterday and they need a tyre machine installation, They only have single into the small unit, the machine that has been bought has a name plate on that says three phase 400v 50Hz in my eyes that is three phase.

The cable is a 4 core brown, black, blue and earth.

The seller assures the buyer it was connected to a single phase.

My next step is to take the the casing apart and see how the motor is wired.

Any advice would be helpful.

Thanks

Justin.

 

[telectrix]

if the machine was run off single phase then it was run through a single to 3 phase converter. it's obviously 3 phase. why would you want to see how it's wired? it needs 3 phase supply.end of.

 

[malcolmsanford]

Tel looks spot on here, but have a look and see if it is dual voltage, some units can be 3 phase 415/400 or 1 phase 240/230 50hz, you maybe lucky.

 

[somersetsparks]

They have probably just supplied you one with a 230v control circuit!

 

[Marvo]

With second hand equipment you'll find all kinds of jiggerypokery that might have gone on in the past. They may have retrofitted it with a single phase motor or possibly used capacitors to run a 3-phase motor on single phase supply. Never rule out the strong possibility they were just plain lying when they said it ran on a single phase supply. This is the kinda job that requires some deep digging before you connect it up.

 

[jktelectrical]

Hi

Thanks for all the posts, well after investigation work it was found to have a single pahse motor fitted as one had previously burnt out. the seller had just cut the supply cable off, the black cable was cut of in the casing of the motor and the brown blue and earth was connected as a single phase.

There could of been trouble if I had connected the cable to a three phase supply.

Marvo your deffo right.

Teletrix you could of had a problem.

Thanks

Justin.

 

[telectrix]

i would have checked the motor for continuity and IR tested before connecting it, and i.m sorry if i misread your OP. from it it sounded as if it was deffo 3 phase.

 

[Hawk81]

if the machine was run off single phase then it was run through a single to 3 phase converter. it's obviously 3 phase. why would you want to see how it's wired? it needs 3 phase supply.end of.

Always best to check would be my advice to anyone. should never ake anything for granted.

 

[SKY]

Glad you got to the bottom of it.

Did you state your findings of the incorrect data plate on the electrical installation sheet?

 

[mogga]

Glad you got to the bottom of it.

Did you state your findings of the incorrect data plate on the electrical installation sheet?

And put a new rating plate/identification on machine