Unbalanced voltage
Unbalanced voltage
(OP)
Hello !
I am an electrical engineer working in a cement factory.
We have a power plant installation of 3 x 8 MW.
I am facing a problem with the unbalanced voltage.
We are using PT's for measuring voltage (6 / 0.1 KV).
This PT have two secondary windings. First one is wye connection and there is the other one which is an open delta connection for measuring neutral to earth voltage.
This second one when we are running the biggest MV motors is going up to 9.5 V. I want to know how can i find the reasons of this unbalance and how can i fix that.
I am an electrical engineer working in a cement factory.
We have a power plant installation of 3 x 8 MW.
I am facing a problem with the unbalanced voltage.
We are using PT's for measuring voltage (6 / 0.1 KV).
This PT have two secondary windings. First one is wye connection and there is the other one which is an open delta connection for measuring neutral to earth voltage.
This second one when we are running the biggest MV motors is going up to 9.5 V. I want to know how can i find the reasons of this unbalance and how can i fix that.






RE: Unbalanced voltage
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Unbalanced voltage
RE: Unbalanced voltage
See Marmite's post in:
Comparison of zig zag and open delta transformers
thread238-222776: Comparison of zig zag and open delta transformers
Apparently IEC defines what we know as a broken delta as an open delta. This may be an IEC poster.
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Unbalanced voltage