SU815827A1 - Device for protective disconnection of electric equipment in electric network withinsulated neutral wire - Google Patents
Device for protective disconnection of electric equipment in electric network withinsulated neutral wire Download PDFInfo
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- SU815827A1 SU815827A1 SU792713724A SU2713724A SU815827A1 SU 815827 A1 SU815827 A1 SU 815827A1 SU 792713724 A SU792713724 A SU 792713724A SU 2713724 A SU2713724 A SU 2713724A SU 815827 A1 SU815827 A1 SU 815827A1
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Description
(54) УСТРОЙСТВО дл ЗАЩИТНОГО ОТКЛЮЧЕНИЯ(54) DEVICE FOR SAFETY SHUTDOWN
ЭЛЕКТРОУСТАНОВКИ В ЭЛЕКТРИЧЕСКОЙ СЕТИELECTRICAL INSTALLATIONS IN ELECTRIC NETWORK
с ИЗОЛИРОВАННОЙ НЕЙТРАЛЬЮISOLATED NEUTRAL
ной мощности нулевой последовательности, трансформатор 5 тока нагрузки, блок 6 формировани сигнала по скорости изменени тока нагрузки, блок 7 запрета, исполнительный орган (релейный элемент) 8, воздействующий на коммутационный аппарат 9 потребител 10.zero-sequence power, a load current transformer 5, a signal generation unit 6 according to the rate of change of the load current, a prohibition block 7, an actuator (relay element) 8 acting on the switching device 9 of the consumer 10.
Устройство работает следующим образом .The device works as follows.
В нормальном состо нии контакты коммутационной аппаратуры 9 замкнуты, исполнительный орган 8 обесточен. При прикосновении человека -к одной из фаз в зоне защиты на выходе- блока 2 возникает сигнал , который проходит блок 7 запрета и вызывает срабатывание исполнительного .органа 8. Последний воздействует на коммутационный аппарат и отключает потребитель 10 от сети.In the normal state, the contacts of the switching equipment 9 are closed, the executive body 8 is de-energized. When a person touches one of the phases in the protection zone, output 2 of the block 2 generates a signal that passes the inhibitor block 7 and triggers the actuator 8. The latter acts on the switching device and disconnects the consumer 10 from the network.
При возникновении короткого замыкани вне зоны на выходе блока 4 возникает сигнал, поступающий на запрещающий вход блока 7. Вследствие этого, сигнал от блока 2 к исполнительному органу 8 не проходит, т. е. устройство не реагирует на внещние короткие замыкани .In the event of a short circuit outside the zone at the output of block 4, a signal arrives at the inhibitory input of block 7. As a result, the signal from block 2 to the executive body 8 does not pass, i.e. the device does not respond to external short circuits.
При включении устройства происходит скачок естественного тока утечки, который вызывает ложное отключение потребител . Поосольку этому скачку сопутствует скачок тока нагрузки, то блок 6 в момент включени выдает сигнал на запрещающий вход блока 7 запрета и ложного отключени не происходит.When the device is turned on, a jump in the natural leakage current occurs, which causes a false disconnect of the consumer. Since this jump is accompanied by a jump in the load current, block 6 at the moment of switching on generates a signal at the prohibiting input of block 7 of the prohibition and false disconnection does not occur.
Таким образом, предлагаемое устройство позвол ет обеспечить селективность работы устройств защитного отключени в трехфазных сет х с изолированной нейтралью , и в конечном итоге, повыщение надежности электроснабжени защищаемого потребител .Thus, the proposed device allows to ensure the selectivity of operation of protective disconnect devices in three-phase networks with insulated neutral, and ultimately, increase the reliability of the power supply of the protected consumer.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792713724A SU815827A1 (en) | 1979-01-15 | 1979-01-15 | Device for protective disconnection of electric equipment in electric network withinsulated neutral wire |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792713724A SU815827A1 (en) | 1979-01-15 | 1979-01-15 | Device for protective disconnection of electric equipment in electric network withinsulated neutral wire |
Publications (1)
Publication Number | Publication Date |
---|---|
SU815827A1 true SU815827A1 (en) | 1981-03-23 |
Family
ID=20805591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792713724A SU815827A1 (en) | 1979-01-15 | 1979-01-15 | Device for protective disconnection of electric equipment in electric network withinsulated neutral wire |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU815827A1 (en) |
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1979
- 1979-01-15 SU SU792713724A patent/SU815827A1/en active
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