HELP 3 phase masonary saw wiring

[liambtuk]

hello got a problem with my 3phase masonary saw somebody has wired it up I don't think it's correct because the blade sometimes spins backwards and often doesn't start when turned on without a spin first makes a buzzing sound and does nothing it's also getting really hot. I will attach pics of the wiring diagram and the actual wiring on the saw

 

[westward10]

I assume the refrigeration unit is not connected?

 

[liambtuk]

unsure as to what you mean there?

 

[snowhead]

Has it ever worked whilst in your ownership?
Has anyone worked on it lately, if so what were the symptoms leading to it being looked at?

You're probably going to need an electrician familiar with 3 phase motors to both test the motor and test the 3 phase supply to it.

I think Westward was refering to the drawing showing a Refigeration unit in the wiring.
Does that refer to a water pump for the blade?

 

[westward10]

The unit which says BOMBA REFRIGERACION on your schematic is a cooling pump, is it there?

 

[Strima]

When was the motor last serviced?

Has it worked properly in the past?

Has it had any modifications?

 

[Pete999]

Wired in Star, think what Westward means is, is the kit marked as Bomba refrigeracion is connected or not?

 

[buzzlightyear]

looking at the wiring in that motor the possibility is wired wrong to the board .

 

[telectrix]

and a pic of the rating plate would help

 

[Pete999]

How are you starting this Motor? the entry of the wiring looks a bit suspect as well.

 

[telectrix]

i suspect someone has messed up the winding connections. those red, black, and whites just don't look right.

 

[liambtuk]

No there's isn't a refrigeration unit attached and yes I think it's a water pump but it isn't attached. The motor is around 3 months old we had to replace it and the last person to wire it up did it this way.
The wires coming into the saw are all fine and checked by an electrician.
The switch to start stop the motor doesn't dry on when pressed we've been having to keep the button pressed in to run it.
Attached pics of on off switch and plate

 

[liambtuk]

Pics

 

[westward10]

Sounds like you have lost a phase if so stop using it.

 

[Pete999]

Sounds like you have lost a phase if so stop using it.

Judging from the photo you posted Siam, the wiring to the motor looks anything but fine, no glanded entry, looks a right DIY job to me, did the starter come with the Saw? As Westward noted maybe you have lost a phase, have your electrician check that possible fault out, your saw starter looks like DOL maybe you should consider Star / Delta set up, to avoid any start up difficulties.

 

[snowhead]

Sounds like you have lost a phase if so stop using it.

Cause that's what probably killed the last motor.

 

[liambtuk]

Yes the starter was supplied with the motor from Sima

 

[buzzlightyear]

The wires coming into the saw are all fine and checked by an electrician.

did he wire that motor up

 

[telectrix]

it's got to run in star full time, Pete. delta would burn it out. and if OP has to hold the start button in, the contactor needs looking at

 

[liambtuk]

No we had him check all the wiring before we got a new motor.
Then a friend wired the actual motor to the switch wont be asking him again.