| 摘要 |
PURPOSE:To alleviate labor required for maintenance/inspection by providing a timer delivering an inspection command and delivering an inspection execution command upon count up of the timer. CONSTITUTION:When a power receiving facility is operated and a manual inspection switch 6 is turned ON, an inspection execution command 4A is delivered to an inspection executing section 2. The inspection executing section 2 delivers an inspection signal 9 to a power protective relay 1 which is thereby inspected automatically according to a predetermined sequence. Upon receiving the inspection execution command 4A, a periodic inspection timer 7 begins counting and eventually counts up upon elapse of a predetermined period. An inspection execution command 4B is then delivered to the inspection executing section 2 and a period is set again before counting is resumed. The inspection executing section 2 delivers an inspection signal 9 to the power protective relay 1 which is then inspected automatically according to a predetermined sequence. The operation is continues thus alleviating labor required for maintenance/ inspection. |
