保定奥兰电气科技有限责任公司

中性点经电阻接地，分为低电阻接地和高电阻接地。DL/T620--1997有以下规定：

The neutral point is grounded in resistance and is classified into low resistance grounding and high resistance grounding. DL/T620-1997 has the following rules: 

（1）3~20kV具有发电机系统，发电机内部发生单相故障要求顺势切机时，宜采用高电阻接地方式、电阻器一般接在发电机中性点变压器的二次绕组上，

(1) 3 ~ 20 kv has generator system, generator internal conveniently cutting machine for single-phase fault occurring, appropriate USES high resistance grounding method, resistor is generally on the generator neutral point of transformer secondary winding, 

（2）6~35kV主要由电缆构成的送、配电系统，单相接地故障电容电流较大时，可采用低电阻接地方式，但应考虑供电可靠性要求、故障时瞬态电压、瞬态电流对电气设备的影响、对通信的影响和继电保护技术要求以及本地的运行经验等

(2) 6 ~ 35 kv mainly composed of cable, power distribution system, single phase ground fault capacitive current is larger, can use low resistance grounding mode, but should be considered when power supply reliability requirement, fault transient voltage, the influence of the transient current of electrical equipment, and the impact on the communication and the requirement of relay protection technology and the local operating experience, etc 

（3）6kV和10kV配电系统以及发电厂厂用电系统，单相接地故障电容电流较小时，为防止谐振、间隙性电弧接地过电压等对设备的损害，可采取高电阻接地方试

(3) 6 kv and 10 kv power distribution system and power plant auxiliary power system, the single phase ground fault capacitive current is small, so as to prevent resonance, lacunar arc grounding overvoltage, such as the damage to the equipment, can meet place try to adopt high resistance