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2 158 997

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IPC

(21) (22)

Application

98118328/09, 1998-10-07

(24)

Start date

1998-10-07

(22)

Actual filing date

1998-10-07

(45)

Published

2000-11-10

(72)

Inventor

Kuznetsov V.V.Kuznetsov G.V.Prokhorov M.A.Shumun N.M.

(73)

Holder

Kuznetsov Vladimir VladimirovichKuznetsov German VladimirovichProkhorov Mikhail AleksandrovichShumun Natal'Ja Mikhajlovna

DEVICE FOR PROTECTION OF STEPPING-DOWN TRANSFORMER AGAINST DYNAMIC AND THERMAL EFFECTS CAUSED BY SHORT CIRCUIT CURRENTS Russian patent published in 2000 - IPC

Abstract RU 2158997 C2

FIELD: electrical engineering and power supply equipment for railroads. SUBSTANCE: device has current-clipping resistor, which is by- passed by dynamic drive switch. Power circuit of dynamic drive switch includes current detector. Voltage detector is connected in parallel to current-clipping resistor. Information from current detector and voltage detector is received by logical unit, which also receives signal from measuring current transformer. Signal of output of logical unit is received by input of switch control unit, which is connected to dynamic drive switch. EFFECT: increased efficiency of protection. 1 dwg

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RU 2 158 997 C2

Authors

Kuznetsov V.V.

Kuznetsov G.V.

Prokhorov M.A.

Shumun N.M.

Dates

2000-11-10—Published

1998-10-07—Filed