METHOD OF DETERMINING FACTORS OF DEFECTS AT DISTRIBUTING BOARD

摘要

PURPOSE: A method for determining the defective factors of a distributing board is provided to efficiently find out the reason of malfunction generated in a distributing board. CONSTITUTION: A current flowing in equipment in a distributing board is compared with a preset first reference value(S1). The line temperature of the distributing board is compared with the preset first reference value if the current is larger than the first reference value(S2). A loading rate is compared with a third reference value if the line temperature is larger than a preset second reference value(S3). The partial discharge or an arc of a transformer is determined if the current is larger than the first reference value(S4). The current on an input side which the distributing board receives from a power supply source, is compared with a preset fourth reference value if the current is larger than the second reference value(S5).