消弧及过电压保护装置，消弧消谐综合保护柜在变电站的高压室中常见，主要作用是用来灭弧。灭弧原理是：当10kV线路发生断线时，线路中产生的容性电流不能够自灭，需要一种感性电流来进行补偿，以达到灭弧的目的。
Arc suppression and overvoltage protection devices, as well as arc suppression and harmonic suppression comprehensive protection cabinets, are commonly found in high-voltage rooms of substations. Their main function is to extinguish arcs. The principle of arc extinguishing is that when a 10kV line breaks, the capacitive current generated in the line cannot extinguish itself, and an inductive current is needed to compensate for it in order to achieve the purpose of arc extinguishing.
消弧及过电压保护装置主要由三相组合式过电压保护器DCB、可分相控制的高压真空接触器JZ、微机控制器、高压限流熔断器组件FU及带有辅助二次绕组的电压互感器PT等组成。
The arc suppression and overvoltage protection device mainly consists of a three-phase combined overvoltage protector DCB, a phase controllable high-voltage vacuum contactor JZ, a microcomputer controller, a high-voltage current limiting fuse component FU, and a voltage transformer PT with auxiliary secondary winding.
（1）弧光接地过电压的措施分析
(1) Analysis of measures for arc grounding overvoltage
（2）中性点非直接接地系统弧光接地过电压的危害
(2) The hazards of arc grounding overvoltage in neutral point non directly grounded systems
1）弧光接地过电压的产生
1) Generation of arc grounding overvoltage
2）弧光接地的产生
2) The generation of arc grounding
3）弧光接地过电压的危害
3) The hazards of arc grounding overvoltage
（3）弧光接地时电弧对故障点的破坏
(3) Damage of arc to fault point during arc grounding
1）不同电网单相接地时的电弧电流
1) Arc current during single-phase grounding in different power grids
2）弧光接地时流过故障点的电弧电流
2) The arc current flowing through the fault point during arc grounding
3）单相接地电弧电流对电缆线路的破坏
3) The damage of single-phase grounding arc current to cable lines
4）单相接地电弧电流对架空线路的破坏
4) The damage of single-phase grounding arc current to overhead power lines