| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple device which branches 100V single-phase two-wire system of distribution lines to serve as a branched distribution line A and a branched distribution line B from a 200V three-phase three-wire system of distribution line to serve as a main distribution line, and besides enables them to be switched, according to the load importance, etc., of the branched distribution line A and the branched distribution line B. SOLUTION: A switch 2 is connected into a 200V three-phase three-wire system of distribution line (main distribution line) 1, and a 100V single-phase two-wire system of distribution line A is branched via a transformer 3 from an arbitrary single phase of that switch 2, and furthermore the distribution line is branched into two lines, and one hand is made the distribution line A on the power side of that switch 2 and the other hand is made the distribution line B on load side of that switch 2, and also a drive coil Ry of a voltage drive relay 5 is connected to the arbitrary single phase on load side of that switch 2, and a pair of make contacts 6 of that voltage drive relay 5 are inserted and connected to the distribution line B on the load side. |
