Classification of capacitors and other electrical protection devices:
Capacitors and other electrical protection devices can be classified into medium voltage capacitor banks, surge arresters, drop-out fuses and other protection devices based on their functions. The classification is mainly determined by the rated voltage, the rated capacity and the applicable operating conditions.
电容器及其他电气保护装置的分类：电容器及其他电气保护装置按功能可分为中压电容器组、避雷器、跌落式熔断器及其他保护装置。其分类依据主要取决于额定电压、额定容量及适用运行工况。
Working principle of capacitors and other electrical protection devices:
Capacitors and other electrical protection devices are used to improve power quality and ensure the safe operation of the power system. The medium voltage capacitor bank compensates reactive power and improves the power factor; the surge arrester limits overvoltage and protects equipment insulation; the drop-out fuse realizes overload and short-circuit protection and provides a visible isolation gap.
电容器及其他电气保护装置的工作原理：电容器及其他电气保护装置用于改善电能质量并保障电力系统的安全运行。中压电容器组补偿无功功率并提高功率因数；避雷器限制过电压并保护设备绝缘；跌落式熔断器实现过载与短路保护，并提供可见的隔离断口。
Structural characteristics of capacitors and other electrical protection devices:
The capacitor bank is composed of capacitor units, a frame, a discharge resistor and a connecting conductor; the surge arrester is composed of a nonlinear resistor element and an insulating housing; the drop-out fuse is composed of a fuse link, a fuse holder and an insulating support. They are characterized by a compact structure, reliable operation, convenient installation and low maintenance demand.
电容器及其他电气保护装置的结构特点：电容器组由电容器单元、框架、放电电阻及连接导体组成；避雷器由非线性电阻元件及绝缘外壳组成；跌落式熔断器由熔丝、熔管及绝缘支座组成。其具有结构紧凑、动作可靠、安装方便、维护需求低等特点。
Operational requirements of capacitors and other electrical protection devices:
The rated voltage and capacity shall match those of the system, and the wiring shall be correct and firm. The capacitor bank shall be discharged before maintenance, and the surge arrester shall be inspected regularly for damage. The fuse link shall be selected according to the rated current; operation under overvoltage or overload conditions for a long time is strictly prohibited.
电容器及其他电气保护装置的工作要求：额定电压及容量应与系统相匹配，接线应正确牢固。电容器组在检修前应充分放电，避雷器应定期检查有无损坏。熔丝应按额定电流选配；严禁在过电压或过载条件下长期运行。
Applications of capacitors and other electrical protection devices:
The equipment is extensively applied in medium-voltage switchgear, substations, industrial power distribution systems and distribution networks for reactive power compensation, overvoltage protection and overload and short-circuit protection.
电容器及其他电气保护装置的用途：该设备广泛应用于中压开关柜、变电站、工业配电系统及配电网中，用于无功补偿、过电压保护及过载与短路保护。