SU838865A1 - Device for earthing protection of electric power network with dead earthed neutral wire - Google Patents
Device for earthing protection of electric power network with dead earthed neutral wire Download PDFInfo
- Publication number
- SU838865A1 SU838865A1 SU792743067A SU2743067A SU838865A1 SU 838865 A1 SU838865 A1 SU 838865A1 SU 792743067 A SU792743067 A SU 792743067A SU 2743067 A SU2743067 A SU 2743067A SU 838865 A1 SU838865 A1 SU 838865A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- dead
- electric power
- power network
- neutral wire
- earthed neutral
- Prior art date
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
(54) УСТРОЙСТВО ДЛЯ ЗАЩИТЫ ЭЛЕКТРИЧЕСКОЙ СЕТИ(54) DEVICE FOR PROTECTION OF ELECTRIC NETWORK
С ГЛУХОЗАЗЕМЛЕННОЙ НЕЙТРАЛЬЮ ОТ КОРОТКОГО ЗАМЫКАНИЯ НА ЗЕМЛЮWITH DEAF EARTHED NEUTRAL FROM SHORT CIRCUIT TO EARTH
трансформатор 2 тока нагрузки, блок 3 делени тока утечкина ток нагрузки, блок 4 дифференцировани по времени величины отношени тока утечки к току нагрузки, выходной релейный блок 5 (i заданным порогом срабатывани , вбздействующий на катушку б отключени выключател .transformer 2 load current, unit 3 for dividing leakage current to load current, unit 4 for differentiating time the ratio of leakage current to load current, output relay unit 5 (i specified trigger threshold, acting on coil off switch.
При коротком замыкании на землю отношение тока утечки к току нагрузки возрастает , что приводит к Срабатыванию выходного релейного блока. При коммутаци х нагрузки или повреждени х тока замыкани на землю в соседних лини х данное отношение токов существенно меньше, что позвол ет отстроитьс от них и сохранить высокую чувствительность к повреждени м на защищаемом участке, чем и достигаетс положительный эффект изобретени .In the event of a short circuit to earth, the ratio of the leakage current to the load current increases, which leads to the activation of the output relay unit. When switching loads or damage to the earth fault current in adjacent lines, this current ratio is significantly lower, which allows them to be rebuilt from them and maintain high sensitivity to damage in the protected area, thus achieving the positive effect of the invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792743067A SU838865A1 (en) | 1979-03-30 | 1979-03-30 | Device for earthing protection of electric power network with dead earthed neutral wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU792743067A SU838865A1 (en) | 1979-03-30 | 1979-03-30 | Device for earthing protection of electric power network with dead earthed neutral wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU838865A1 true SU838865A1 (en) | 1981-06-15 |
Family
ID=20817946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU792743067A SU838865A1 (en) | 1979-03-30 | 1979-03-30 | Device for earthing protection of electric power network with dead earthed neutral wire |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU838865A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142970A1 (en) * | 1991-12-24 | 1993-07-01 | Abb Patent Gmbh | Fault current and / or differential current circuit breaker |
-
1979
- 1979-03-30 SU SU792743067A patent/SU838865A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142970A1 (en) * | 1991-12-24 | 1993-07-01 | Abb Patent Gmbh | Fault current and / or differential current circuit breaker |
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