| 摘要 |
PROBLEM TO BE SOLVED: To enable manufacturing at low cost without the use of a power semiconductor switch in a main breaker, with a small electric conduction loss at the conduction of a rated current.SOLUTION: A DC breaker (100) includes: a first line (20) in which a high-speed switch (21) and a power semiconductor switch (22) are connected in series; a second line (30) in which a plurality of high-speed switches (31), a plurality of parallel connection units, each having a non-linear resistor (32) and a power fuse (33) connected in parallel, and a resistor (36) which are connected in series; and a third line (40) having a non-linear resistor (41). The first, second and third lines (20, 30, 40) are mutually connected in parallel.SELECTED DRAWING: Figure 3 |
