Medium Voltage Ring Main Circuits

Thread Starter


Joined Jun 29, 2010
Hi Friends,
Can you please help me understand the concept of medium voltage ring main circuits which is widely used in some countries like in KSA and other part of the middle east. The way I understand it, it seems that the unit substations were connected in series, meaning it has a uniform current but have different voltage in each. How could this happen, if each unit substation has a requirement, say 13.8kV, so the last unit substation would have the least voltage on it.. Please shed a light on this matter.. Attach herewith is the sample I've got from the net.

Thank you so much in advance.