Removing N-current at HV?
Removing N-current at HV?
(OP)
My brother has asked me a strange question.
Apparently the distribution lines (100 kV or more) are Y-coupled. But the neutral current is said to be nearly zero (1-2A), virtually no matter how unballanced the load on the 3-phase consumer net is. (400V European Y with high N-current)
Can anybody give an explanation how this is done?
A Swedish contact of his has mentioned something I translate into a "Mixed Coupling", that takes care of it, but I have found nothing further about it.
I have just found the zigzag transformer, that may do it , but is that it?
Apparently the distribution lines (100 kV or more) are Y-coupled. But the neutral current is said to be nearly zero (1-2A), virtually no matter how unballanced the load on the 3-phase consumer net is. (400V European Y with high N-current)
Can anybody give an explanation how this is done?
A Swedish contact of his has mentioned something I translate into a "Mixed Coupling", that takes care of it, but I have found nothing further about it.
I have just found the zigzag transformer, that may do it , but is that it?






RE: Removing N-current at HV?
Have him study transformer connections and grounding.
Rafiq Bulsara
http://www.srengineersct.com
RE: Removing N-current at HV?
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