SU955323A1 - Device for protecting electric machine stator winding against grounding - Google Patents
Device for protecting electric machine stator winding against grounding Download PDFInfo
- Publication number
- SU955323A1 SU955323A1 SU803244997A SU3244997A SU955323A1 SU 955323 A1 SU955323 A1 SU 955323A1 SU 803244997 A SU803244997 A SU 803244997A SU 3244997 A SU3244997 A SU 3244997A SU 955323 A1 SU955323 A1 SU 955323A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- winding
- windings
- transformer
- phase
- frequency filter
- Prior art date
Links
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Description
1one
Изобретение относитс к устройствам защиты и автоматики электроэнергетических устройств, а именно к устройствам защиты обмоток статора электрических мащин, особенно ге1 ераторов, от замыканий на землю с использованием наложенных токов.The invention relates to devices for the protection and automation of electric power devices, in particular, to devices for protecting the stator windings of electric machines, especially headers, from earth faults using superimposed currents.
Известно устройство дл защиты обмотки статора, реагирующее на напр жение третьей гармоники, содержащее трехфазный трансформатор, частотный фильтр и исполнительный орган 1.A device for protection of a stator winding that reacts to a third-harmonic voltage, containing a three-phase transformer, a frequency filter and an actuator 1, is known.
Устройство имеет зону нечувствительности , замыкани в которой не воспринимаютс .The device has a dead zone, closures in which are not perceived.
Известно также устройство, позвол ющее обеспечить защиту обмотки статора , которое содержит источник тока с частотой, отличной от номинальной частоты сети, два частотных фильтра, измерительный однофазный трансформатор и трехфазный трансформатор, подключенный к выводам обмотки статора. Работа устройства основана на контроле уровн наложенного тока. В измерительном органе сравниваютс выпр мленные значени напр жени наложенного тока с напр жением, пропорциональным наложенному току 2.It is also known a device that permits protection of a stator winding, which contains a current source with a frequency other than the nominal frequency of the network, two frequency filters, a measuring single-phase transformer and a three-phase transformer connected to the stator winding terminals. The operation of the device is based on monitoring the level of the applied current. The rectified values of the applied voltage are compared in the measuring organ with a voltage proportional to the applied current 2.
Недостатком данного устройства защиты вл етс его мала чувствительность, что обусловлено сравнением рабочего и компенсационного сигналов после их выпр млени , вследствие чего не учитываютс фазовыеThe disadvantage of this protection device is its low sensitivity, which is due to the comparison of the working and compensation signals after they are rectified, as a result of which phase signals are not taken into account.
5. соотношени сигналов.5. signal ratios.
Кроме того при наличии в системе напр жени генераторного блока р да измерительных трансформаторов напр жени (ТН) необходимо нейтрали всех их, кромеIn addition, if there are a number of measuring voltage transformers (TN) in the voltage generator unit, all of them must be neutral except
10 одного, заземлить через конденсаторы, чтобы не допустить прохождени посто нного тока, при этом по услови м техники безопасности цепи защитных устройств должны быть шунтированы разр дниками и т.п.10 one, ground through the capacitors to prevent the passage of direct current, while under the conditions of safety the circuit of protective devices must be shunted by arresters, etc.
Цель изобретени - повышение чувст5 Бительности устройства.The purpose of the invention is to increase the feeling of the device.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU803244997A SU955323A1 (en) | 1980-12-22 | 1980-12-22 | Device for protecting electric machine stator winding against grounding |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU803244997A SU955323A1 (en) | 1980-12-22 | 1980-12-22 | Device for protecting electric machine stator winding against grounding |
Publications (1)
Publication Number | Publication Date |
---|---|
SU955323A1 true SU955323A1 (en) | 1982-08-30 |
Family
ID=20941995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU803244997A SU955323A1 (en) | 1980-12-22 | 1980-12-22 | Device for protecting electric machine stator winding against grounding |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU955323A1 (en) |
-
1980
- 1980-12-22 SU SU803244997A patent/SU955323A1/en active
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0172254B1 (en) | High frequency noise absorbing circuit | |
US3813593A (en) | Reduction of turbine generator shaft torques | |
US4429338A (en) | Earth contact monitoring device for a polyphase three-phase filter circuit | |
US3944846A (en) | Subsynchronous relay | |
US3973169A (en) | Overvoltage protection for high voltage shunt capacitor banks | |
US4208687A (en) | Protective relay apparatus | |
SU955323A1 (en) | Device for protecting electric machine stator winding against grounding | |
Pazmandi | Stator earth-leakage protection for large generators | |
KR940022101A (en) | Leakage current prevention circuit | |
US3736440A (en) | Circuit breaker | |
SU1599815A1 (en) | Method and apparatus for electrodynamic tests of power transformers | |
SU980205A1 (en) | Device for protective electric machine stator from earthing | |
SU661432A1 (en) | Device for dry testing of cable insulation | |
SU1010690A1 (en) | Device for protecting generator-transformer assembly from earthing | |
SU970546A1 (en) | Device for protecting electric machine stator from earthing | |
Hunter | Tests on lightning protection for ac rotating machines | |
RU2052826C1 (en) | Trouble-shooting device for d | |
RU2014702C1 (en) | Gear for protection of synchronous generator against fault to ground in one point of excitation circuit | |
SU1136251A1 (en) | Device for earthing neutral in system with low fault-to-earth current | |
CA1147384A (en) | Filter input protection | |
SU760295A1 (en) | Device for compensating for single-phase earthing current | |
SU525192A1 (en) | Device for differential directional protection of parallel lines | |
SU955330A1 (en) | Device for protecting generator against single-phase short-circuiting | |
SU523480A1 (en) | Device for balancing voltage of a three-phase network | |
SU1688201A1 (en) | The electrical generator stator winding insulation tester |