| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved distribution system which uses a disconnector and surge protectors. SOLUTION: A disconnector unit 4 has power bus-bars 8 composed of three phase lines and a neutral line, and a circuit-breaker 9 which interrupts the currents of the three phase lines. A surge protecting unit 6 has power bus-bars 10 composed of corresponding three phase lines and a neutral line, and phase- neutral line surge protectors 166, 168, 170 which protect downstream loads from surges and transient phenomena. The power bus-bars 8 are fixed and connected to the power bus-bars 10, and a series connection of the power bus- bars for loads is formed. |
