| 摘要 |
A digital protective relay includes at least one daughter PCB (300) having an electronic circuit which generates electromagnetic interference noise or high frequency noise; and a backplane printed circuit board (100) having, on an upper surface thereof, a plurality of first connectors (130) for connection with the daughter PCB (300), the backplane PCB (100) being connected to the daughter PCB through the first connectors (130), and providing a noise discharge path (120) along which the electromagnetic interference noise or the high frequency noise from the daughter PCB flows to an external ground. |
