| 额定阻值范围 | 0.1Ω∽1500Ω |
|---|---|
| 运行通流时间 | 5s，10s，30s，60s，10mins，连续运行 |
| 防护等级 | IP20～IP55 |
| 安装方式 | 户内、户外 |
| 产地 | 溧阳 |
| 额定电流 | 1～5000A |
| 额定电压 | 0.33 ～110KV |
| 结构形式 | 柜式 |
| 品牌 | 溧阳众诚达 |
| 型号 | NGRCC |
| 加工定制 | 是 |
??产品详情
??中性点接地电阻柜及其配套控制柜
??Neutral Grounding Resistor and Control Cabinet
??产品描述（Product Profile）
??中性点接地电阻主要用于110KV以下主要由电缆线路构成。单相接地故障电容电流较大的送配电系统及电容电流虽小但为防止谐振过电压的电厂、厂用电系统，前者多为低阻接地而后者多为高阻接地。因此，中性点接地电阻特别适用于城市配电网、大型工业园区、电厂、海上平台配电系统、大型化工企业等
??Neutral Grounding resistors are mainly applied to the electric power system under 110KV.One is the electric power distribution system which is composed by cable lines,with big fault capacitance and current(single-phase earthing).The other is the electric power system for electric power plant whose capacitance and current are little but to avoid the resonance.The former system is mostly low-resistance earthing,and later is high-resistance earthing.Therefore,neutral Grounding resistors are especially suitable for urban electric networks,large industry garden,electric power plant,maritime electric power distribution system and large chemical enterprises,etc.
??三相交流电网中性点与大地间电气连接的方式，称为电网中性点接地方式。电网中性点接地电阻工作原理图如下：
??The electrical connection mode between neutral point three-phase AC power grid and earth,called grounding mode for neutral point.Neutral point grounding resistor principle diagram as follows:
??对变压器中性点，其电阻接地有两种方式：
??对变压器副边为星型接法的变压器，中性点经电阻直接接地。（见图一）
??对变压器副边为角型接法的变压器，中性点经接地变压器经电阻接地。（见图二）
??Neutral point of transformer,the grounding resistor has two ways:
??On the secondary side the transformer is a star connection method,the neutral point grounding resistor straight.(see Figure.1)
??On the secondary side the transformer is a triangle connection method,the neutral point grounding transformer grounding through grounding transformer.(see Figure.2)
??以上电阻采用不锈钢电阻片，CT可选（若带接地变、真空接触器、隔离开关设备，通流时间＞10S时，箱体尺寸需另外调整）
??Stainless steel resistors,CT is optional(if other equipment like grounding transformer,isolating switch,vacuum contactor and the rated time＞10S,the enclosure dimensions will be adjusted)
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