| 摘要 |
A safety type air pressure distribution board (high voltage distribution board, low voltage distribution board, MCC board, and distribution board) comprises a housing, a pump, a sealing member, a pressure sensor, and a control unit. The housing comprises a chamber which forms an internal space to install an electric device inside and a door which is installed in the chamber to open and close the chamber. The pump is installed in the housing and supplies external air to the inside of the housing. The sealing member is installed between the chamber and the door to seal the internal space of the housing. The pressure sensor is installed inside the chamber of the housing and measures the pressure of the internal space of the chamber. The control unit controls the pump to maintain the pressure of the internal space of the chamber which is higher than the pressure of the outside of the chamber by receiving a measured value of the pressure sensor. |
