P0500PG

描述

为了防止无功补偿电容器爆炸发生，可以在补偿电容器组的每相内串接一个空心电抗器来限制电流。使电容电路的合成电抗对于高次谐波而言，变为感性电抗。在高次谐波中，3次谐波因变压器的△连接而被短路，因此这是针对5次以上谐波的措施。若选择串联电抗器的电抗使5次谐波谐振时，则5次谐波被短路，对5次谐波以上的高次谐波，因电容回路变为电感性，所以波形被改善，从而根本上消除了产生谐振的可能。防谐振串联空心电抗器的电抗可以通过计算得出：

即XL>4%XC

式中：L——串联电抗器的电感，H;

C——补偿电容器的容量，F;

XL——串联电抗器的感抗，Ω;

XC——补偿电容器的容抗，Ω。

由此可知，串联电抗器的电抗约为容抗的4%以上即可。因考虑到系统频率偏低，出现事故时电容器容量减少，实际上选用感抗为5%～6%XC。

欧美品牌停产的，常用的“PLC”备品备件

我司产品应用于以下领域：

1,《发电厂DCS监控系统》

2,《智能平钢化炉系统制造》

3,《PLC可编程输送控制系统》

4,《DCS集散控制系统》
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5,《智能型消防供水控制系统》

6,《化工厂药液恒流量计算机控制系统》

7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列

本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

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