
基本信息:
- 专利标题: 一种电流速断与零序保护结合防止站用变越级跳闸装置
- 专利标题(英):Device for preventing override trip of station transformer by combining current quick-break and zero-sequence protection
- 申请号:CN201821786355.8 申请日:2018-10-31
- 公开(公告)号:CN209200656U 公开(公告)日:2019-08-02
- 发明人: 张焕青 , 江渊 , 司马朝进 , 袁修昉 , 刘颖彤 , 刘杜 , 郑丹 , 刘远超 , 金琦芸 , 侯慧 , 马志远 , 吴细秀
- 申请人: 国家电网有限公司 , 国网湖北省电力有限公司检修公司 , 武汉理工大学
- 申请人地址: 北京市西城区西长安街86号
- 专利权人: 国家电网有限公司,国网湖北省电力有限公司检修公司,武汉理工大学
- 当前专利权人: 国家电网有限公司,国网湖北省电力有限公司检修公司,武汉理工大学
- 当前专利权人地址: 北京市西城区西长安街86号
- 代理机构: 北京中北知识产权代理有限公司
- 代理人: 李新昂
- 主分类号: H02H7/26
- IPC分类号: H02H7/26
The utility model discloses a device for preventing override trip of a station transformer by combining current quick-break and zero-sequence protection. The device comprises a low-voltage circuit breaker and a zero-sequence current protection device, the low-voltage circuit breaker is provided with over-current protection and no-voltage protection, and the zero-sequence current protection deviceis composed of a zero-sequence current transformer, an over-current relay, a time-delay relay and a shunt excitation coil. The beneficial effects of the utility model are that: the utility model discloses: the beneficial effect is: Current quick-break protection and zero-sequence protection can be combined, the advantage that current quick-break protection is simple and reliable is brought into play, the device has the characteristics of sensitivity and quickness of zero-sequence protection, the device is used for power utilization protection of a low-voltage power distribution network and a transformer substation, the capability of correctly and timely cutting off a fault area can be improved, and override trip accidents are avoided.
IPC结构图谱:
H | 电学 |
--H02 | 发电、变电或配电 |
----H02H | 紧急保护电路装置 |
------H02H7/00 | 当出现正常工作条件的不希望有的变化时能完成自动切换的,专用于特种电机或电设备的或专用于电缆或线路系统分段保护的紧急保护电路装置 |
--------H02H7/26 | .电缆或线路系统的分段保护,例如当发生短路、接地故障或电弧放电时切断一部分电路 |