The veracious fixed value of the differential protection relay is very important, which directly affects the reliability of short out alternately, neutral-point and direct or indirect grounding.

• 作为电力系统中变压器及发电机的主保护元件,差动保护继电器整定值选择的准确性直接影响其相间短路、中性点直接或间接接地的可靠性。