How to make a Electrical Diagram Steinmetz Circuit Delta 3 phase motor

Thread Starter

Luc w

Joined Apr 17, 2024
2
Hey Hello everyone, I am now doing an internship and one of my task is to research if we can save costs on the ovens they are now producing. They want to reduce the components on the groundbase. I have found a solution of a apply a Steinmetz circuit. I have tested this and it worked all right.

The question I have right now is, at my Diagram I have the motor in star, but this is the normal condition not with the steinmetz, I want to add the steinmetz circuit to my motor in the diagram but I don't know how to do it, I want to have my motor in delta with the Steinmetz, I know all the wiring how to connect the circuit but I don't know how to put that down in a good and efficient way in my diagram. This is the system that I have right now. Check picture one with the star diagram
Diagram star.PNG
and the 2nd picture is all the wiring of my Steinmetz circuit with a capacitor, All the calculations are all right but I don't know how to turn these wiring delta sheet to a electrical diagram. I hope someone has experience in creating diagram with delta. Online I only see diagrams of Star-Delta, but I just need a diagram of Delta with Steinmetz. Probably I am thinking way to difficult but I can't make it work right now. thanks in advance.
steinmetz delta.PNG
All the coils are black and the wiring colour I have added in red. I hope it is understandable. If I need to wire it, it is no problem but to create a diagram I don't have any idea.
Luc
 

MisterBill2

Joined Jan 23, 2018
18,934
The drawing appears to be correct but I have no idea as to if it will work. I am not familiar with the " Delta with Steinmetz" connection scheme for operating a three phase motor. I predict that the performance will not be nearly as good as a traditional 3-phase delta connection.
Is the reason for using this scheme the lack of three phase power in the application location??Or is there another reason??
If 3-phase power is not available, my suggestion would be to use a variable speed drive that is able to use single phase power.
 

Thread Starter

Luc w

Joined Apr 17, 2024
2
The drawing appears to be correct but I have no idea as to if it will work. I am not familiar with the " Delta with Steinmetz" connection scheme for operating a three phase motor. I predict that the performance will not be nearly as good as a traditional 3-phase delta connection.
Is the reason for using this scheme the lack of three phase power in the application location??Or is there another reason??
If 3-phase power is not available, my suggestion would be to use a variable speed drive that is able to use single phase power.
They want to cut costs and standardise there models, so the3 phase models need to go to 230V. Also it removes expensive components like phase protection relay and the motor protection relay. It will lose around 30% of the total power and the run up time is 5x as long as usual but that is not an issue for us. I know how to wire it and put it in the machine but the company want to see a nice diagram. So my question how to connect a motor in delta on paper.
 

MisterBill2

Joined Jan 23, 2018
18,934
The circuit on paper should be the same as it is actually connected. The schematic shown is a good representation of a wiring scheme although I am not certain if it works. But it is a good industrial drawing.
 

nsaspook

Joined Aug 27, 2009
13,418
They want to cut costs and standardise there models, so the3 phase models need to go to 230V. Also it removes expensive components like phase protection relay and the motor protection relay. It will lose around 30% of the total power and the run up time is 5x as long as usual but that is not an issue for us. I know how to wire it and put it in the machine but the company want to see a nice diagram. So my question how to connect a motor in delta on paper.
Sorry but IMO that's asking for serious trouble. I wouldn't buy anything with that kludge.
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