Low-tension side load change system null of the distribution transformer between the bank which

摘要

PURPOSE:To prevent a momentary power interruption by closing a second switch, opening primary cutouts, closing a first switch, and then opening the second switch. CONSTITUTION:A low voltage automatic switch S1 is connected as a first switch between low voltage sides of both banks A, B by using a bypass cable H. An automatic switch S2 is connected as a second switch connected by using leading wires H in parallel with primary cutouts PCU-PCW provided at the respective phases U-W of the a power distribution line L of the bank B side. The second switch is closed, and the cutouts PCU-PCW of one bank are opened. Subsequently, the first switch S1 is closed, the second switch S2 is then opened.