| 摘要 |
PURPOSE: To ensure operation of an important load by separating a general load from a private generator to prevent its overload while operating parallel off the private generator from a commercial power supply by a signal detected by instantaneous interruption before interrupting the commercial power supply. CONSTITUTION: A parallel off control device 1 for a commercial power supply linkage private generator introduces power from special high voltage trunk lines 11, 12 lowers voltage transformers TR1 to TR3, and distributes power to high voltage distribution lines W1 to W3 of three systems. A general load L1 of lighting or the like is connected to the lines W1 to W3, to distribute private power from the lines W2, W3 to a high voltage bus W4 through distribution lines 13, 14. Breakers 52F24, 52F31 and 52F1T, 52R1S and a direction short-circuit relay DSR are connected in series to the distribution lines 13, 14. General loads L2 to L4, breakers 52FB1, 52FB2, 52FG, 52GB1 and 52FBS are connected to the high voltage bus 4. The private generator G, having a capacity of covering an important lad L5, is always operated. When the relay DSR is actuated, the breaker 52FB1 is interrupted. In this way, operation of the important load L5 is ensured to be continued. |
