| 低压变压器短路引起的高压侧母线故障事故分析及防范 |
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| 引用本文： | 宋晓. 低压变压器短路引起的高压侧母线故障事故分析及防范[J]. 河北工程技术高等专科学校学报, 2011, 0(3): 47-49,57 |
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| 作者姓名： | 宋晓 |
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| 作者单位： | 中国化工沧州大化股份有限公司电气车间,河北沧州,061000 |
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| 摘 要： | 分析变压器短路故障的原因,查出6 kV断路器机构问题不能断开故障电流引起越级信号动作并造成上一级断路器跳闸。经过对断路器机构检修,继电保护定值重新整定计算,并加装失灵保护,解决保护间配合的不足之处。
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| 关 键 词： | 过流信号 误自投 数字电器保护设备 试验周期 |
The Accident Analysis and Prevention of High Voltage Lateral Bus Fault Caused by Low Voltage Transformer Short-circuits |
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| SONG Xiao. The Accident Analysis and Prevention of High Voltage Lateral Bus Fault Caused by Low Voltage Transformer Short-circuits[J]. Journal of Hebei Engineering and Technical College Quarterly, 2011, 0(3): 47-49,57 |
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| Authors: | SONG Xiao |
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| Affiliation: | SONG Xiao(Electrical Workshop,China National Chemical Corporation Cangzhou Dahua Limited Company,Cangzhou 061000,China) |
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| Abstract: | The causes of transformer short-circuits are analyzed.For the mechanical structure problem of 6 kv circuit breaker,the failure current could not be disconnected,which caused the higher level signal action and higher level breaker.Through servicing the breakers,resetting the calculation of relay protection constant value,and installing breaker failure protection,the deficiencies during their protections were resolved. |
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| Keywords: | over-current signal incorrect auto-cast digital electrical protection equipment test period |
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