| 摘要 |
The invention provides an insulation aging monitoring system which detects, without concern on the frequency and voltage changes of an inductive load such as a motor, leakage current relevant to the insulation aging corresponding to a ground insulation resistor, thereby performing monitoring. The insulation aging monitoring system monitors the insulation aging of the ground insulation resistor based on the voltage, frequency and zero-phase current of an alternating-current circuit connected with the inductive load. The insulation aging monitoring system includes a monitoring unit for monitoring the control state of the aforementioned inductive load. In the insulation aging monitoring system, based on the control state of the aforementioned inductive load detected by the monitoring unit, the monitoring of the insulation aging is carried out by a specified calculating unit for calculating the leakage current corresponding to the ground insulation resistor. |
