SU464039A1 - Device for protection against earth faults of the stator winding of the generator - Google Patents
Device for protection against earth faults of the stator winding of the generatorInfo
- Publication number
- SU464039A1 SU464039A1 SU1827100A SU1827100A SU464039A1 SU 464039 A1 SU464039 A1 SU 464039A1 SU 1827100 A SU1827100 A SU 1827100A SU 1827100 A SU1827100 A SU 1827100A SU 464039 A1 SU464039 A1 SU 464039A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- generator
- protection against
- stator winding
- earth faults
- against earth
- Prior art date
Links
Landscapes
- Synchronous Machinery (AREA)
Description
1one
Известны устройства дл защиты от замыканий на землю обмотки статора генератора, содержащие источник переменного тока, к которому через элемент сравнени подключены выпр мительные мосты, нагрузкой которых служат сопротивлени , включенные одно в цепь нейтрали статора генератора, а другое в цепь источника эталонного тока. Однако такие устройства сложны и недостаточно надежны в работе.Devices for protection against ground faults of the stator windings of the generator are known, which contain an alternating current source to which rectifier bridges are connected to the circuit through a reference element, the resistance of which is connected one to the generator stator neutral circuit and the other to the reference current source. However, such devices are complex and not reliable in operation.
Дл упрощени схемы, повышени чувствительности и надежности защиты в предлагаемом устройстве элемент сравнени выполнен в виде дифференциального трансформатора тока, первичные обмотки которого подключены к выпр мительным мостам и выполнены в виде коаксиальных цилиндров.To simplify the circuit, increase the sensitivity and reliability of protection in the proposed device, the comparison element is made in the form of a differential current transformer, the primary windings of which are connected to rectifier bridges and made in the form of coaxial cylinders.
На чертеже дана схема описываемого устройства .The drawing is a diagram of the described device.
К источнику 1 переменного тока через дифференциальный трансформатор 2 тока с первичными обмотками, выполненными в виде коаксиальных цилиндров, подключены выпр мительные мосты 3 и 4. Вторична обмотка трансформатора 2 включена на токовое реле 5. Нагрузкой выпр мительных мостов 3 и 4 служат сопротивлени 6 и 7, одно из которых включено в цепь нейтрали статора генератора 8, имеющего дугогасительную катушку 9. Нулевой провод трансформатора 10Rectifier bridges 3 and 4 are connected to the alternating current source 1 through the differential current transformer 2 with primary windings made in the form of coaxial cylinders. The secondary winding of the transformer 2 is connected to the current relay 5. The rectifying bridges 3 and 4 serve as a load of resistors 6 and 7 , one of which is included in the neutral circuit of the stator of the generator 8, having an arcing coil 9. The neutral wire of the transformer 10
напр жени подключен между катушкой 9 и сопротивлением 6.voltage is connected between coil 9 and resistance 6.
При отсутствии повреждени изол ции статора токи со стороны питани выпр мительных мостов 3 и 4 одинаковы и во вторичной обмотке трансформатора 2 ток отсутствует. При снижении сопротивлени изол ции относительно земли ток, питающий выпр мительный мост 3, увеличиваетс , а ток, питающий выпр мительный мост 4, не измен етс , поэтому во вторичной обмотке трансформатора 2 по вл етс ток и реле 5 срабатывает.If there is no damage to the stator insulation, the currents on the supply side of the rectifying bridges 3 and 4 are the same and there is no current in the secondary winding of the transformer 2. When the insulation resistance decreases relative to the earth, the current supplying the rectifying bridge 3 increases, and the current supplying the rectifying bridge 4 does not change, so a current appears in the secondary winding of the transformer 2 and the relay 5 operates.
Применение дифференциального трансформатора тока с первичными обмотками, выполненными в виде коаксиальных цилиндров, позвол ет значительно повысить чувствительность защиты. Сопротивление 6 на пор док меньше, чемThe use of a differential current transformer with primary windings made in the form of coaxial cylinders makes it possible to significantly increase the sensitivity of protection. The resistance is 6 times less than
импеданс дугогасительной катушки 9, и никакого вли ни на режим работы нейтрали генератора не оказывает, а при замыкани х на землю оказываетс под. незначительным напр жением .the impedance of the arc quenching coil 9, and no effect on the mode of operation of the neutral generator does not, and when closed to the ground is under. low voltage.
Работа устройства не зависит от величин индуктивностей и емкостей защищаемого генератора .The operation of the device does not depend on the values of inductances and capacitances of the protected generator.
Если генератор работает с изолированной нейтралью и дугогасительна катушка отсутствует , то вместо дугогасительной катушкиIf the generator works with an isolated neutral and the arcing coil is missing, then instead of the arcing coil
включают активное сопротивление, на пор док превышающее сопротивление 6.include active resistance, by an order of magnitude greater than 6.
Предмет изобретени Subject invention
Устройство дл защиты от замыканий на землю обмотки статора генератора, содержащее источник переменного тока, к которому через элемент сравнени подключены выпр мительные мосты, нагрузкой которых служатA device for protection against earth faults of the stator windings of the generator, containing an AC source, to which rectifier bridges are connected through a reference element, and the rectifier bridges are connected to them.
сопротивлени , включенные одно в цепь нейтрали статора генератора, а другое в цепь источника эталонного тока, отличающеес тем, что, с целью упрощени , повышени чувствительности и надежности, элемент сравнени выполнен в виде дифференциального трансформатора тока, первичные обмотки которого подключены к выпр мительным мостам и выполнены в виде коаксиальных цилиндров .resistance included one in the neutral circuit of the stator of the generator, and the other in the circuit of the reference current source, characterized in that, in order to simplify, increase sensitivity and reliability, the comparison element is designed as a differential current transformer, the primary windings of which are connected to rectifying bridges and made in the form of coaxial cylinders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1827100A SU464039A1 (en) | 1972-09-08 | 1972-09-08 | Device for protection against earth faults of the stator winding of the generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU1827100A SU464039A1 (en) | 1972-09-08 | 1972-09-08 | Device for protection against earth faults of the stator winding of the generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU464039A1 true SU464039A1 (en) | 1975-03-15 |
Family
ID=20526630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU1827100A SU464039A1 (en) | 1972-09-08 | 1972-09-08 | Device for protection against earth faults of the stator winding of the generator |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU464039A1 (en) |
-
1972
- 1972-09-08 SU SU1827100A patent/SU464039A1/en active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3619721A (en) | Triggered vacuum gap keep-alive circuit | |
| JPS5931283B2 (en) | 2-pole grounding fault type circuit disconnector | |
| SU464039A1 (en) | Device for protection against earth faults of the stator winding of the generator | |
| SU432628A1 (en) | PARAMETRIC FILTER OF ZERO SEQUENCE CURRENTS | |
| SU136813A1 (en) | The method of protection of voltage transformers in installations for monitoring the state of isolation of the high-voltage network | |
| US1865273A (en) | Protective arrangement | |
| SU43952A1 (en) | Device to protect multi-phase electrical installations with insulated neutral against earth faults | |
| SU574811A1 (en) | Device for automatic registration of number of ground faults in phases of circuit with insulated neutral wire | |
| SU62600A1 (en) | Device to protect the rotor winding of a synchronous generator from ground fault | |
| SU88911A1 (en) | Device for selectively protecting feeders and machines from earth faults | |
| SU699600A1 (en) | Device for checking insulation in mains of up to 1000v with insulated neutral wire | |
| US3614532A (en) | Triggered vacuum gap keep-alive circuit | |
| SU652643A1 (en) | Device for protection of electric plant from voltage failure of any phase | |
| SU570948A1 (en) | Device for selective current protection from ground favlt in radial lines possessing heavy capacitance current | |
| SU26372A1 (en) | Device to protect multi-phase electrical lines from ground wiring | |
| SU78912A1 (en) | Device for powering current coils of ohmmeter distance protection | |
| SU425259A1 (en) | DIRECTIONAL RELAY FOR PROTECTION AGAINST THE EARTH | |
| SU126540A1 (en) | Differential current protection of three-phase transformers | |
| SU508851A1 (en) | Ground fault protection device | |
| SU73839A1 (en) | Isolation control device in high voltage three-phase networks | |
| SU107479A1 (en) | Device for the protection of three-phase electrical installation | |
| SU48735A1 (en) | Device for protecting electrical machines and transformers against earth faults | |
| SU1035716A1 (en) | Device for protecting synchronous generator against earthing in one point of excitation circuit | |
| SU137164A1 (en) | Ground fault protection device | |
| SU714559A1 (en) | Arrangement for protecting from earthing in electric network with insulated neutral wire |