http://www.cosmos-systems.com/supply-systems/
Why is prefferd use 110v power supply system continues in some countries?
I know that some countries use 110v system DC power instead of 220V AC, but do not know the reason.
It was a security measure to prevent electrocution. It works Although it costs more for the cables. Some people believe it was to coincide with the supplied battery power systems, but that's not right.
Invensys Process Systems LNG Supply Chain