APPARATUS AND METHOD OF DETECTING A POWER LINE FAULT IN JUNCTION BOX

摘要

The present invention relates to an apparatus and a method of detecting a power line fault of a junction box which can detect a fault such as a short circuit or a overvoltage occurring in wires for supplying power outputted from a high voltage distribution element and a low voltage distribution element of a junction box loaded in a vehicle to loads. According to the present invention, the apparatus of detecting a power line fault of a junction box comprises: a switching unit to switch a path of power flowing through a power line on a high voltage load side connecting an output end of a high voltage distribution element and an input end of a high voltage load, or a path of power flowing through a power line on a low voltage load side connecting an output end of a low voltage distribution element and an input end of a low voltage load; a clamp detection unit to detect a clamp voltage level applied to the power line on the high voltage load side or the power line on the lower voltage load side depending on an operation of the switching unit; a divided voltage detection unit to detect a divided voltage value applied to the power line on the high voltage load side or the power line on the lower voltage load side depending on an operation of the switching unit; and a control unit to use the clamp voltage level of the power line detected by the clamp detection unit and the divided voltage value of the power line detected by the divided voltage detection unit to determine a fault of the power line on the high voltage load side or the power line on the lower voltage load side.