| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an underground buried type control board which prevents water intrusion into the control board even when the control board is submerged in water for a long time. <P>SOLUTION: An underground buried type control board 1 includes: a control board body 8 installed in a hand hole 4 buried underground; a bell shaped case 5 installed in the hand hole 4, opens to an ambient air at its lower end, and covers the control board body 8 from above to store it; and an external line cable 3 connecting the control board body 8 with an electric board 2 provided above the ground. A part of the interior of the external line cable is filled with an epoxy resin 11. <P>COPYRIGHT: (C)2013,JPO&INPIT |
