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| 摘要: |
| 根据海阳市现行110kV及以下变压器后备保护配置存在的不足，阐明了增设中，低压侧限时速断保护的必要性和迫切性，并提出了对电磁型变压器保护增设该保护功能的可行性方案，结建议采用的SQJ系列限速断继电器作了简单介绍。 |
| 关键词: 电力系统 继电保护 限时速断保护 变压器 后备保护 必要性 可行性 |
| DOI： |
| 分类号:TM772 |
| 基金项目: |
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| Necessity and Feasibility of Dead-Line Instant Protectio n for Transformer |
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LIU Xin-dong
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| Abstract: |
| According to the existing shortages in backup protection configuration for transformer of 110 kV and below, the necessity and urgency of adding dead-line instant protection at medium and low voltage sides are explained and its feasible scheme of electromagnetic transformer protection is proposed.The suggested SQJ series relay is briefly introduced. |
| Key words: main transformer,dead-line instant protection,necessity,feasibility, |
