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零序电流互感器在电力系统产生零序接地电流时与继电保护装置或信号配合使用，使装置元件动作，实现保护或监控。
The zero sequence current transformer (zero sequence current transformer) is used in combination with relay protection device or signal when the electric power system produces zero sequence grounding current, so as to protect or monitor the device element action.
HS-LJK、HS-LXK系列零序电流互感器是电缆型,采用ABS工程塑料外壳、树脂浇注成全密封；使用绝缘油制冷切割工艺，有效避免了互感器在长期使用过程中的锈蚀。绝缘性能好，外形美观。具有灵敏度高、线性度好、运行可靠、安装方便等特点。其性能优于一般的零序电流互感器，使用范围广泛，不仅适用于电磁型继电保护，还能适用于电子和微机保护装置。用户可根据系统的运行方式，中性点有效接地或中性点非有效接地的不同，选用相适应的零序电流互感器。
HS-LJK and HS-LXK series zero sequence current transformer are cable type, which are fully sealed with ABS engineering plastic shell and resin, and the insulation oil refrigeration and cutting technology can effectively avoid corrosion of mutual inductor during long term use. Good insulation and beautiful appearance. It has the characteristics of high sensitivity, good linearity, reliable operation and convenient installation. Its performance is better than ordinary zero sequence current transformer. It is widely used. It is not only suitable for electromagnetic relay protection, but also suitable for electronic and microcomputer protection devices. The user can choose the suitable zero sequence current transformer according to the operation mode of the system, neutral point effective grounding or neutral point non effective grounding.