| 电网出现单相接地故障时需立即跳闸切除故障线路 |
| 添加时间：2019/12/16 13:48:09 浏览次数： |
| 1、针对性强，保护到位 1. Targeted and well protected 变压器中性点接地电阻柜适用于系统中性点采用小电阻或中电阻接地的场合。此时，电网出现单相接地故障时需立即跳闸切除故障线路。当电网出现单相接地时，接地电阻向接地点提供附加阻性电流，使接地电流呈阻容性质，从而保证产生的过电压不超过2.6倍的相电压。 The transformer neutral grounding resistance cabinet is suitable for the situation where the neutral point of the system is grounded with small resistance or medium resistance. At this time, when the single-phase ground fault occurs in the power grid, it is necessary to trip and cut off the fault line immediately. When the single-phase grounding occurs in the power grid, the grounding resistance provides additional resistive current to the grounding point, so that the grounding current is resistive and capacitive, so as to ensure that the over-voltage generated is not more than 2.6 times of the phase voltage. 2、结构紧凑，便于安装 2. Compact structure, easy to install 变压器中性点接地电阻柜将零散的Z型接地变压器（如系统无中性点引出则需加装）、电阻器、电流互感器、测量仪表、接地保护输出端子等电器设备整体组合在一个封闭金属柜内，而且可以选配隔离开关、避雷器，成套供货，安全可靠性高，布置清晰整齐，便于安装调试及操作维护。 The neutral point grounding resistance cabinet of the transformer integrates the scattered Z-type grounding transformer (if there is no neutral point in the system, it needs to be added), resistor, current transformer, measuring instrument, grounding protection output terminal and other electrical equipment into a closed metal cabinet, and can be equipped with isolation switch and lightning arrester, which are supplied in complete set, with high safety and reliability, clear and tidy layout, and easy to install Installation, debugging and operation maintenance. |
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