SU589660A1 - Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage side - Google Patents
Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage sideInfo
- Publication number
- SU589660A1 SU589660A1 SU762355792A SU2355792A SU589660A1 SU 589660 A1 SU589660 A1 SU 589660A1 SU 762355792 A SU762355792 A SU 762355792A SU 2355792 A SU2355792 A SU 2355792A SU 589660 A1 SU589660 A1 SU 589660A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- switches
- protection
- substation
- higher voltage
- voltage side
- Prior art date
Links
Landscapes
- Protection Of Transformers (AREA)
- Protection Of Static Devices (AREA)
Description
лител и вь ходом блока управлени , и в цепь блока управлени .control unit and in the course of the control unit, and into the control unit circuit.
На чертеже схематически изображено предложенное устройство.The drawing schematically shows the proposed device.
Понизительный трансформатор 1 поакл чен через отделитель 2 с блоком отключени 3 к линии электропередачи 4 Короткозамыкатель 5 с блоком включегга 6 вгшючен между трансформатором 1 и отделителем 2. Вход блока управлени кототкозаКп.ка-. телам и отделителем 7 подключен к вько- дам релейных зашит 8 трансформатора Вькод этого, блока через реле блокировки 9 соединен с блоком 3 отключени отделител , другой выход этого блока соединен с блоком 6 вгшючени короткозамыкател . Нейтральтрансформатора 1 заземлена через резистор 10, параллельно которому ПОДКЛЕОчен вентильный разр дник 11, В цепь резистора 11 включен трансформатор тока 12 выход KOTOporq соединен с реле времени 13, Выходы реле 13 соединены с входами блока, управлени 7 и реле блокировки 9.The step-down transformer 1 is connected through the separator 2 with the disconnecting unit 3 to the power line 4 The short circuit breaker 5 with the plug-in unit 6 is inserted between the transformer 1 and the separator 2. The input of the control unit is cheap. The bodies and the separator 7 are connected to the external relays; 8 transformers are sewn up. The code of this block is connected to block 3 by means of the blocking relay 9, the other output of this block is connected to block 6 of the short circuit breaker. The neutral transformer 1 is grounded through a resistor 10, in parallel to which the valve discharger 11 is connected. A resistor 11 is connected to a current transformer 12, the output of KOTOporq is connected to a time relay 13, the outputs of relay 13 are connected to the inputs of a control unit 7 and a lock relay 9.
При возникновении несимметричного режима в результате обрывов фаз и коротких замыканий на землю в резисторе 10 возникает ток, вызызакшшЁ срабать ваш1е реле времени 13, если его величина больше оаданной. Реле времени 13 срабатываогс при токе в первичной цепи резистораWhen an asymmetrical mode occurs, as a result of phase breaks and short circuits to earth, a current arises in the resistor 10, causing your time relay 13 to trip if its value is greater than the specified value. Timer 13 triggered at current in the primary resistor circuit
0,5-1,5 А и запускает блок управлени 7, который включает короткозамьткатель 6/ если ток в цепи V сопротивлени протекает больше заданного времени в 2-5 сек. Од« новремеыно реле времени 13 с 11оыош.ыо0.5-1.5 A and starts up the control unit 7, which turns on a short circuit 6 / if the current in the resistance circuit V is more than a predetermined time of 2-5 seconds. One “new time relay 13 with 11yyosh.yo
реле блокировки 9 разрьдаает цепь, соединЯ к цую вход блока управлений 7 с входом блока 3 отключени отделител 2 Это приводит к отключению линии электропереда чн 4 в виду неуспешного автоматического включени линии, так как отдепите ь при пауае автоматического повторного включени не отделил от лингга трансформатор с включенньои корот козам ыкател ем,the blocking relay 9 discharges the circuit, connecting the control unit 7 to the input of the separator 2 disconnecting unit 3 This leads to the disconnection of the power line 4 due to unsuccessful automatic switching on of the line, as the automatic reclosing unit did not separate the transformer from the lingg short goats gobble up,
Задержка включени короткозамыкател на 2-5 сек позвол ет исключить его срабатывание при несснметри х, вызваинькThe delay of the short-circuit switch on for 2-5 seconds makes it impossible for it to operate when there is an inconsistency.
короткими замыкани ми { за указанное врем короткие замыкани в электрической сетиshort-circuits {in the specified time of short-circuits in the electrical network
ликвидируютс ).eliminated).
Применение предложенного устройства исключает также -необходимость предварительного заземлени нейтрали понижак цего трансформатора при плановых переключени х в сети питающего напр жени .The application of the proposed device also eliminates the need for pre-grounding the neutral of the underdog transformer during scheduled switching in the supply voltage network.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU762355792A SU589660A1 (en) | 1976-05-06 | 1976-05-06 | Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage side |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU762355792A SU589660A1 (en) | 1976-05-06 | 1976-05-06 | Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage side |
Publications (1)
Publication Number | Publication Date |
---|---|
SU589660A1 true SU589660A1 (en) | 1978-01-25 |
Family
ID=20659796
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU762355792A SU589660A1 (en) | 1976-05-06 | 1976-05-06 | Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage side |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU589660A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110752536A (en) * | 2019-09-18 | 2020-02-04 | 国网浙江省电力有限公司经济技术研究院 | Gas insulated metal enclosed neutral point complete equipment |
-
1976
- 1976-05-06 SU SU762355792A patent/SU589660A1/en active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110752536A (en) * | 2019-09-18 | 2020-02-04 | 国网浙江省电力有限公司经济技术研究院 | Gas insulated metal enclosed neutral point complete equipment |
CN110752536B (en) * | 2019-09-18 | 2023-11-03 | 国网浙江省电力有限公司经济技术研究院 | Gas-insulated metal-enclosed neutral point complete equipment |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SU589660A1 (en) | Device for protection of step-down transformer with isolated neutral wire in substation without switches on higher voltage side | |
SU641581A2 (en) | Arrangement for disconnecting step-down transformer with insulated neutral wire in substation devoid of cutout on higher-voltage side | |
SU752199A1 (en) | Device for measuring resistance of electric power transmission line damaged portion | |
SU1702475A1 (en) | Directional short-circuit filter protective gear with wire communication channel for power transmission lines | |
SU546987A1 (en) | Device for comprehensive protection of the motor against damage | |
SU1826104A1 (en) | Device for current protection of sectionalizer busducts | |
SU1010689A2 (en) | Device for protection from electric current injury | |
SU1534624A1 (en) | Overvoltage limiter | |
SU1116490A1 (en) | Device for protective de-energization of three-phase a.c.installation | |
SU428493A1 (en) | METHOD OF BLOCKING AUTOMATIC REPEATED INCLUSION OF CABLE LINES | |
SU1376070A1 (en) | Load supply source | |
SU1169793A1 (en) | Device for automatic control of welding circuit in arc welding | |
SU1236571A1 (en) | Device for protective switching-off in a.c.netork | |
SU114000A1 (en) | Device for blocking differential protection of generators | |
SU758017A1 (en) | Device for testing electric strengh of insulation | |
SU1653058A1 (en) | Functional power supply for substation with precharged capacitors | |
SU1128328A1 (en) | Device for protecting electrical installation against overload | |
SU458918A1 (en) | Device to protect the traction substation | |
SU879517A1 (en) | Device for checking high voltage three phase electric machine insulation | |
SU598169A1 (en) | Electric network | |
SU1317555A1 (en) | Device for protection of high-voltage electronic unit | |
SU417868A1 (en) | ||
SU141920A1 (en) | Device for blocking the maximum current protection of power transformers | |
SU390478A1 (en) | ||
SU970532A1 (en) | Device for overcurrent protecting of electric installation |