Looks a squeeze, 240 swa thoughts.

[LeeH]

Angled lugs! Never seen them, I'll have a google and give the info to the sub-contractor. (they haven't seen this yet)

Pete, its a ATEX motor. No mods whatsoever unfortunately.

I'll also call Rota the manufacturer and see what they say as everyone else must manage somehow.

 

[Pete999]

Angled lugs! Never seen them, I'll have a google and give the info to the sub-contractor.

Pete, its a ATEX motor. No mods whatsoever unfortunately.

Sorry Mate never had any dealings with ATEX why the restrictions on mods?

 

[LeeH]

Certified kit pal, it has to be how it was designed to function in hazardous areas.

To be fair this is outside the zone now, but if that changes back I don't my name on a bodged up 10 plus grand motor.

 

[Pete999]

Certified kit pal, it has to be how it was designed to function in hazardous areas.

To be fair this is outside the zone now, but if that changes back I don't my name on a bodged up 10 plus grand motor.

Thanks Lee you learn something new every day, I understand the restrictions now, thanks again for the reply.

 

[westward10]

Two parallel 95.0 ??

 

[ksa74f]

Plus 1 for a parallel feeder

 

[LeeH]

I will have to look again, but I don't think 2 95's quite cut it IIRC.

This install is in Spain so the ambient temps are higher than blighty.

 

[westward10]

If a 240.0 is adequate 2 x 95.0 should be okay as it should give an improved ccc of 10 to 12%.

 

[Darkwood]

Something doesn't ring right about this thread, firstly we need to know how the motor is going to be started and connected, can we get a pic of the plate here and then go on from there, if we have a star/delta arrangement then the csa of cores can be reduced, from experience they do not make motor connections that are impossible to connect to whether it be space or terminal arrangement, if this seems the case then we have missed something out here.

PS - where did 240mm cable come from?, first mentioned in post 6?

 

[LeeH]

Can you reference that somehow please Westy?

I have never done a manual/paper parallel cable calc.

 

[Bobster]

How about 2 x 120mm?

They'll go easy into that.

Edit: most likely be connecting in delta, so it'll fit lovely. An if cable calcs for 1 x 240 is ok, 2 x 120 will be better still.

 

[westward10]

It was a basic calculation based on your 240.0. From Tables 4D4A and 4E4A whereby you half the ccc of the 240.0 and find the nearest csa to that rating which is 95.0, double the ccc of two 95.0s and this is 10 to 12% greater than the single 240.0.

 

[LeeH]

Something doesn't ring right about this thread, firstly we need to know how the motor is going to be started and connected, can we get a pic of the plate here and then go on from there, if we have a star/delta arrangement then the csa of cores can be reduced, from experience they do not make motor connections that are impossible to connect to whether it be space or terminal arrangement, if this seems the case then we have missed something out here.

PS - where did 240mm cable come from?, first mentioned in post 6?

Hi Darkwood, its a VFD as mentioned a few posts down.

I will dig out the data sheet tomorrow.

Amtech cable calc.

 

[Darkwood]

Of the top of my head I cannot see you needing anything larger than 70mm paralleled up using single core tri-rated, assuming distance not an issue here from VFD to motor if distance is what is causing you to increase CSA then it is that you need to address, there are options of how to do this but also with distance on VFD outputs comes other issues like Harmonics?

How is the final connection to the motor configured is it star or delta?

 

[westward10]

Of the top of my head I cannot see you needing anything larger than 70mm paralleled up using single core tri-rated, assuming distance not an issue here from VFD to motor?

Too small once you apply grouping factors.