SU1513561A1 - Arrangement for protection from damage in three-phase electric installation - Google Patents
Arrangement for protection from damage in three-phase electric installation Download PDFInfo
- Publication number
- SU1513561A1 SU1513561A1 SU864082824A SU4082824A SU1513561A1 SU 1513561 A1 SU1513561 A1 SU 1513561A1 SU 864082824 A SU864082824 A SU 864082824A SU 4082824 A SU4082824 A SU 4082824A SU 1513561 A1 SU1513561 A1 SU 1513561A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- intended
- leakage current
- protection against
- phase
- current transformer
- Prior art date
Links
- 238000009434 installation Methods 0.000 title 1
- 239000004020 conductor Substances 0.000 claims abstract description 9
- 238000010616 electrical installation Methods 0.000 claims description 6
- 238000004804 winding Methods 0.000 abstract description 3
- 210000000056 organ Anatomy 0.000 abstract 1
- 230000007935 neutral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
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- Emergency Protection Circuit Devices (AREA)
Abstract
Изобретение относитс к технике электробезопасности и позвол ет повысить эффективность устройства защитного отключени . Цель изобретени - расширение функциональных возможностей путем обеспечени защиты от обрыва проводов и магистрали заземлени . При обрывах магистрали заземлени или фазных проводов за счет элементов 6, 7, 8 и 9 нарушитс равенство нулю геометрической суммы токов, проход щих в заземлитель 5 через трансформатор 3 тока утечки. В его вторичной обмотке наведетс ток, который посредством чувствительного органа 2 мгновенно отключит коммутационный аппарат 1 и обесточит линию 4 и электроприемник 10. 1 ил.The invention relates to electrical safety engineering and makes it possible to increase the effectiveness of a safety shutdown device. The purpose of the invention is to enhance the functionality by providing protection against wire breaks and a grounding line. When ground lines or phase wires are broken, elements 6, 7, 8 and 9 disrupt the geometric sum of the currents passing to grounding conductor 5 through the leakage current transformer 3. In its secondary winding induces a current, which by means of the sensing organ 2 will instantly turn off the switching device 1 and de-energize the line 4 and the electrical receiver 10. 1 Il.
Description
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Изобретение относитс к защите от повреждени в трехфазных электроустановках ьгалр жением до 1 кВ с магистралью заземлени в сет х с изолиро ванной нейтралью, ток замыкани на магистраль заземлени которых превышает ток срабатывани устройства, а также в сет х с глухозаземленной нейтралью на участке за местом последне- го заземлени нулевого провода (счита по ходу движени энергии).The invention relates to protection against damage in three-phase electrical installations up to 1 kV with a grounding circuit in networks with insulated neutral, a circuit current to the grounding circuit of which exceeds the device operation current, as well as in networks with a deafened ground neutral Ground grounding of the neutral wire (counting as the energy moves).
Цель изобретени - расширение функциональных возможност;ей путем обеспечени защиты от обрыва проводов и магистрали заземлени .The purpose of the invention is to expand its functionality by providing protection against wire breaks and a grounding line.
На чертеже показана функциональна схема предлагаемого устройства.The drawing shows a functional diagram of the proposed device.
, Коммутационный аппарат 1 св зан посредством исполнительного органа 2 с трансформатором 3 тока утечки, установленным в начале линии 4. Зазем- литель 5 через элемент 6 сопротивлени св зан с одним из фазных проводов в начале линии непосредственно за трансформатором тока утечки. Элементы 7-9 сопротивлени соединены в звезду, нулева точка которой предназначена дл подключени к корпусу электроустановки 10, другие выводы элементов сопротивлени предназначены дл подключени к соответствующим фазным проводам сети у электроустановки . Проводимость цепи элемента 6 сопротивлени и элемента 7 сопротивлени , предназначенного дл подключени к тому же фазному проводу, меньше в два раза проводимости каждого из двух других элементов сопротивлени .The switching device 1 is connected by an executive body 2 to a leakage current transformer 3 installed at the beginning of line 4. A grounding conductor 5 through a resistance element 6 is connected to one of the phase conductors at the start of the line directly behind the leakage current transformer. Resistance elements 7-9 are connected to a star, the zero point of which is intended to be connected to the housing of the electrical installation 10, other terminals of the resistance elements are intended to be connected to the corresponding phase conductors of the network of the electrical installation. The conductivity of the circuit of the resistance element 6 and the resistance element 7 intended to be connected to the same phase conductor is less than twice the conductivity of each of the two other resistance elements.
Устройство работает следующим об- разом,The device operates as follows.
В нормальном режиме через трансформатор 3 тока утечки проходит ток нагрузки и токи элементов 6-9. При этом геометрическа сумма, токов равна нулю и напр жение во вторичной обмотке трансформатора 3 не индуктируетс . При обрыве магистрали заземлени или фазных проводов во вторичной обмотке трансформгггора 3 по вл етс токIn normal mode, the load current and the currents of the elements 6-9 pass through the leakage current transformer 3. In this case, the geometric sum, the currents are zero and the voltage in the secondary winding of the transformer 3 is not induced. When the ground line or phase wires are broken, a current appears in the secondary winding of the transformer 29
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вызывающий срабатывание исполнительного органа 2 и коммутационного аппарата 1 .causing the actuation of the executive body 2 and the switching apparatus 1.
При по влении тока утечки на землю также нарушитс равенство нулю геометрической суммы токов, проход щих через трансформатор 3, в результате чего также срабатывает исполнительный орган 2 и коммутационный аппарат 1.When the leakage current on the ground appears, the geometric sum of the currents passing through the transformer 3 is also violated, as a result of which the actuator 2 and the switching device 1 also function.
Таким образом, изобретение повышает электробезопасность, обеспечива защиту как от по влени токов утечки, так и от обрыва магистрали и фазных проводов.Thus, the invention improves electrical safety, providing protection against both the occurrence of leakage currents, and line breaks and phase conductors.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864082824A SU1513561A1 (en) | 1986-05-23 | 1986-05-23 | Arrangement for protection from damage in three-phase electric installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU864082824A SU1513561A1 (en) | 1986-05-23 | 1986-05-23 | Arrangement for protection from damage in three-phase electric installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU1513561A1 true SU1513561A1 (en) | 1989-10-07 |
Family
ID=21243409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU864082824A SU1513561A1 (en) | 1986-05-23 | 1986-05-23 | Arrangement for protection from damage in three-phase electric installation |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU1513561A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142969A1 (en) * | 1991-12-24 | 1993-07-01 | Abb Patent Gmbh | Fault current protection switch |
-
1986
- 1986-05-23 SU SU864082824A patent/SU1513561A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Якобе А.И. и др. Электробезопасность в сельском хоз йстве. - М.: Колос, с. 151-171. Ганаши A.M. и др. Лабораторный практикум по электроприводу и применение электроэнергии в сельском хоз йстве. - М.: Высша школа, 1983, с. 164, рис. 92. * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4142969A1 (en) * | 1991-12-24 | 1993-07-01 | Abb Patent Gmbh | Fault current protection switch |
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