一、我国矿井电网变压器中性点接地方式概况为了井下供电安全,《煤矿安全规程》第393条规定:“井下配电变压器中性点禁止接地……。禁止由地面上中性点接地的变压器成发电机直接向井下供电”。确定上述条款的理由在于,减小电网单相接地电流值及人体触电电流值。 First, China’s mine power grid transformer neutral grounding Overview In order to underground power supply safety, “Coal Mine Safety Regulations” Article 393 states: “underground distribution transformer neutral grounding prohibited ... ... prohibited by the ground on the neutral grounding transformer Into the generator directly to the underground power supply. ” The rationale for determining these terms is to reduce the magnitude of the single-phase grounded current and the magnitude of the human body’s electric shock current.