发明名称 |
SHORT-CIRCUIT PROTECTIVE DEVICE FOR PARALLEL AC POWER TRANSMISSION LINES |
摘要 |
FIELD: relay protection for cable and overhead ac power transmission lines with common circuit breaker per phase. SUBSTANCE: protective device has one differential current transformer per phase of power transmission line that incorporates two primary windings. Each phase is connected in series with one of two parallel power transmission lines being protected. Secondary winding of current transformer is connected to responding element of protective relay. Transformer primary windings are multiturn cross-over windings having equal turn number; they are differentially interconnected and wound on transformer magnetic core so that their turns in layer are alternating. EFFECT: enhanced sensitivity and reduced length of dead zone. 1 cl, 2 dwg |
申请公布号 |
RU2224342(C2) |
申请公布日期 |
2004.02.20 |
申请号 |
RU20000123808 |
申请日期 |
2000.09.19 |
申请人 |
OAO "INSTITUT "EHNERGOSET'PROEKT" |
发明人 |
PETROV S.JA.;RIBEL' N.E.;GORINA O.V.;DMITRIEV K.S.;ANTONOV L.E.;FEDOTOV S.P.;CHUEV V.M. |
分类号 |
H02H3/347;H02H7/26 |
主分类号 |
H02H3/347 |
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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