| 摘要 |
<p>In a power receiving system, a network transformer (7), a protector breaker (10) and a current detector (9) are connected between the load side of each of a plurality of network lines (1A, 1B, 1C) and a network bus (2), a breaker (13) is connected to the primary side of the network transformer, the current detector being operative to detect an accident current (2i) on the secondary side of the network transformer, and relays (14, 15) or an operation controller (20) is provided which is responsive to the detection signal to open the breaker and protector breaker to switch off accident currents (1i, 2i) on the primary and secondary sides of the network transformer, whereby the protective range is so expanded as to cover a line section between the network transformer and the protector breaker and the scale of the overall power receiving system is reduced. <IMAGE></p> |
