Based on the occasions to which the inverter filter applies, it can be divided into the following categories: First of all, it is necessary to specify the rated operating voltage, current and frequency of the equipment.
The rated current of the inverter filter should not be taken too small, otherwise it will damage the filter or reduce the life of the inverter filter. But the rated current should not be taken too large, because the current will increase the size of the inverter filter or reduce the electrical performance of the inverter filter. Generally, the rated current of the inverter filter is determined by 1.2~1.5 times of the rated current of the equipment. According to the maximum permissible value of the equipment leakage current to select the inverter filter, especially for some health care equipment is more so.