发明名称 |
REMOTE PROTECTION OF THREE PHASE DISTRIBUTION TRANSFORMERS |
摘要 |
It is desirable to provide remote digital protection of distribution transformers. This specification discloses a protection system able to measure and compare increases in both negative and positive phase reference currents on a distribution cable feeding a transformer and to trigger a circuit breaker to isolate the cable only if the negative sequence current increase exceeds a predetermined proportion of any simultaneous positive sequence current increase. Consequently, energising with a 12.5% unbalance current has been found possible without false tripping. |
申请公布号 |
AU7888587(A) |
申请公布日期 |
1988.04.14 |
申请号 |
AU19870078885 |
申请日期 |
1987.09.23 |
申请人 |
ELECTRICITY COUNCIL, THE, |
发明人 |
JOHN THOMAS HAMPSON |
分类号 |
H02H1/04;H02H3/34;H02H3/38;H02H3/44 |
主分类号 |
H02H1/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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