There is a problem with the line. The control cabinet is a closed or semi-closed metal cabinet. When cleaning the control cabinet, the dust on the control cabinet needs to be blown away, but it cannot be blown into the circuit. If it is blown into the circuit, it will cause damage to the wire line. If a problem occurs, it will always report a fault. You only need to turn off the power and clean it again to solve the problem. The layout of the control cabinet meets the requirements for normal operation of the power system and is convenient for maintenance personnel to inspect and repair.