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2 162 269

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(51)

IPC

(21) (22)

Application

98115783/09, 1998-08-20

(24)

Start date

1998-08-20

(22)

Actual filing date

1998-08-20

(45)

Published

2001-01-20

(72)

Inventor

Nagaj V.I.Sarry S.V.Chizhov K.V.Nagaj V.V.

(73)

Holder

Nauchno-Issledovatel'Skij Institut Ehnergetiki Novocherkasskogo Gosudarstvennogo Tekhnicheskogo Universiteta

BACKUP PROTECTIVE DEVICE FOR LINE WITH TRANSFORMERS ON TAPS Russian patent published in 2001 - IPC

Abstract RU 2162269 C2

FIELD: protective gear. SUBSTANCE: device provides for monitoring moduli of backward-, forward-, and zero-sequence phase currents, phase relations of forward- and backward-sequence currents, forward- sequence voltages and currents including backward-sequence current and preceding forward-sequence load current. Device operating currents and voltages are set depending on preceding abnormal operation of circuit under protection. EFFECT: improved sensitivity and selectivity of device. 1 dwg

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RU 2 162 269 C2

Authors

Nagaj V.I.

Sarry S.V.

Chizhov K.V.

Nagaj V.V.

Dates

2001-01-20—Published

1998-08-20—Filed