Thanks so much to everyone
Were you really helpful
Tomorrow I will do the tests, especially those recommended by you
An excellent forum, You are all Americans?
I am Italian and I work here
The section of the yellow/green conductor is that because i must to do it half size of the phases conductors. this method is used to observe the graph of security voltage/time, if I have a ground fault voltage divider between inpendence phases and impendece yellow/green the potential of the...
@WAROSS
The side trasformer that look at the grid is connected to the delta while the side trasformer that look at the syncronous machine is connected to the star with the its wye point is grounded.
The syncronous machine is connected to the star with the its wye point is not to the ground.
The...
The genset is new. The syncronous is a Stamford and the prime mover unit is a GE Jenbacher is powered by biogas.
How did you measure this 40A? I measured the current with Fluke industrial scopemeter 123 and rogowki sensor,
I attached the photo the 1-ST signal is the current and 2-ND signal is...
Hi warros,
Your explanation is correct, and it is true that a ground connection would not be part of the loop, but my system is a TN-S mode therefore the loop there is because the PE conductor is connect to asincronous frame and arrive from star poit of the trasformer. You must consider that...
The measurement conditions were at the maximum load where i found 40 A on the wire PE from syncronous frame.
Moreover i saw the current from wire PE on syncronous frame increase if the power load incrases.
This suggests that the problem is the shaft current.
Agree that is not the capacitive...
Hello everyone,
Perhaps the title is not the best but here I will try to explain.
Of a synchronous machine from 1,5 MVA with the star center isolated from earth, and line voltage of 400 V its connected to the grid by the trasformer MV/LV with connections D/yn.
I saw the following fact: The PE...
