SU665360A1 - Current symmetric component relay - Google Patents
Current symmetric component relayInfo
- Publication number
- SU665360A1 SU665360A1 SU782574078A SU2574078A SU665360A1 SU 665360 A1 SU665360 A1 SU 665360A1 SU 782574078 A SU782574078 A SU 782574078A SU 2574078 A SU2574078 A SU 2574078A SU 665360 A1 SU665360 A1 SU 665360A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- symmetric component
- component relay
- current symmetric
- voltage
- amplifier
- Prior art date
Links
Landscapes
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Control Of Voltage And Current In General (AREA)
Description
зователей 1 тока в напр жение следует применить преобразователи напр жени в напр жение.Current to voltage pickups 1 should use voltage to voltage converters.
Работает устройство следующим образом .The device works as follows.
С выходов преобразователей 1 сигналы подаютс на входы усилител 2 через четырехполюсники 3. Если в защищаемой установке возникает несимметричный режим , то он сопровождаетс по влением соответствующей симметричной составл ющей (например, при коротких замыкани х , св занных с землей, характерной особенностью вл етс наличие симметричной составл ющей нулевой последовательности ). До тех пор пока значение контролируемой составл ющей не -превосходит значени уставки, напр жение на выходе усилител 2 равно нулю, так как равно нулю сопротивление петли обратной св зи усилител 2 благодар соответствующему включению диода 5. Если же значение контролируемой симметричной составл ющей превосходит значение уставки, то в полупериоды, когда симметрична составл юща противоположна по знаку напр жению уставки, на выходе усилител 2 по вл етс напр жение , величина которого регулируетс при помощи блока регулировани уровн ограничени . Это напр жение отпирает тиристор выходного блока 7, что обеспечивает проведение оперативных переключений.From the outputs of the transducers 1, signals are fed to the inputs of amplifier 2 through quadrupoles 3. If an asymmetrical mode occurs in the protected installation, it is accompanied by the appearance of a corresponding symmetrical component (for example, during short circuits connected to ground, a characteristic feature is the presence of zero sequence component). As long as the value of the monitored component does not exceed the value of the setpoint, the voltage at the output of amplifier 2 is zero, since the resistance of the feedback loop of amplifier 2 is zero due to the corresponding switching on of diode 5. If the value of the monitored symmetric component exceeds the value of , then in half-periods, when the symmetrical component is opposite in sign to the voltage of the setpoint, a voltage appears at the output of the amplifier 2, the value of which is regulated by the level control unit extra restrictions. This voltage unlocks the thyristor of the output unit 7, which ensures the conduct of operational switching.
Реле выполн етс на одном усилителе, что снижает его стоимость.The relay is performed on a single amplifier, which reduces its cost.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782574078A SU665360A1 (en) | 1978-01-23 | 1978-01-23 | Current symmetric component relay |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU782574078A SU665360A1 (en) | 1978-01-23 | 1978-01-23 | Current symmetric component relay |
Publications (1)
Publication Number | Publication Date |
---|---|
SU665360A1 true SU665360A1 (en) | 1979-05-30 |
Family
ID=20746418
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU782574078A SU665360A1 (en) | 1978-01-23 | 1978-01-23 | Current symmetric component relay |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU665360A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443854A (en) * | 1981-06-08 | 1984-04-17 | Electric Power Research Institute, Inc. | Current sensor responsive to symmetrical and asymmetrical currents and current limiting protector utilizing same |
-
1978
- 1978-01-23 SU SU782574078A patent/SU665360A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4443854A (en) * | 1981-06-08 | 1984-04-17 | Electric Power Research Institute, Inc. | Current sensor responsive to symmetrical and asymmetrical currents and current limiting protector utilizing same |
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