SU497677A2 - Device for current protection zero sequence - Google Patents
Device for current protection zero sequenceInfo
- Publication number
- SU497677A2 SU497677A2 SU2018826A SU2018826A SU497677A2 SU 497677 A2 SU497677 A2 SU 497677A2 SU 2018826 A SU2018826 A SU 2018826A SU 2018826 A SU2018826 A SU 2018826A SU 497677 A2 SU497677 A2 SU 497677A2
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- current protection
- zero sequence
- currents
- protection zero
- filter
- Prior art date
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
1one
Изобретение относитс к технике релейной защиты и предназначено дл применени в электрических сет х с большими токами замыкани па землю дл защиты тех элементов от замыкани на землю, в которых могут протекать броски намагничивающ.их токов силовых трансформаторов, а также токи с частотой 150 ГЦ, вл ющиес следствием переходных процессов в сет х высокого напр жени .The invention relates to a relay protection technique and is intended for use in electrical networks with large ground-to-close currents to protect those elements from a ground-fault, in which surge currents of magnetizing currents of power transformers, as well as currents with a frequency of 150 Hz, can flow. resulting from transients in high voltage networks.
По основному авт. св. 300924 известно устройство дл токовой защиты нулевой последовательности электрических сетей с большими токами замыкани на землю, содержаniee фильтры токов нулевой последовательности , трапсреактор с магнитным щунтом, врем -импульсную схему, индуктивно-емкостный фильтр первой гармоники, диодную логическую схему «ИЛИ и реагирующий орган, в котором первична обмотка трансформатора расположена на стержне без зазора, одна из вторичпых обмоток расположена на стержне с зазором и подключена к входу врем -импульсной схемы, друга вторична обмотка расположена на стержне без зазора и подключена к входу фильтра первой гармоники, а выход врем -импульсной схемы и фильтра первой гармоники через логическую схему «ИЛИ включен па реагирующий орган.According to the main author. St. 300924 a device is known for current protection of a zero sequence of electrical networks with large earth-fault currents, containing filters of zero-sequence currents, a trap reactor with a magnetic tongue, a time-pulse circuit, a first-harmonic inductive-capacitance filter, an OR diode logic circuit, where the primary winding of the transformer is located on the rod without a gap, one of the secondary windings is located on the rod with a gap and is connected to the input of the time-pulse circuit, the other is secondary The coil is located on the rod without a gap and is connected to the input of the first harmonic filter, and the output of the time-impulse circuit and the first harmonic filter is through the logic circuit “OR the reacting organ is switched on.
Недостатком известного устройства вл етс увеличение его чувствительности при протекапии на выходе фильтра токов нулевой последовательности с частотой 150 гц, от которых устройство должно отстраиватьс .A disadvantage of the known device is an increase in its sensitivity during flow at the output of the filter of zero-sequence currents with a frequency of 150 Hz, from which the device must be rebuilt.
Целью изобретени вл етс устранение указанного недостатка.The aim of the invention is to eliminate this drawback.
С целью устранени указанного недостатка в предлагаемом устройстве введен дополнительный транзистор, эмиттерно-коллекторпый нереход которого включен в рассечку коллектором и коллекторным сопротивлением входного транзистора врем -импульсной схемы, а база через сопротивление - на выход выпр мител индуктивноемкостного фильтра первой гармоники.In order to eliminate this drawback, an additional transistor is introduced in the proposed device, the emitter-collector non-transition of which is included in the dissecting collector and collector resistance of the input transistor time-impulse circuit, and the base through resistance - to the output of the first-harmonic rectifier filter.
На чертеже изображена схема устройства.The drawing shows a diagram of the device.
Устройство токовой защиты нулевой последовательпости состоит из комплекта трансформаторов тока, образуюп1,их фильтр токов нулевой последовательности 1, трансреактора с магнитным шунтом 2, индуктивно-емкостного фильтра нервой гармоники 3 с выпр мителем 4, реагирующего органа 5 и врем -пмнульсной схемы 6 с выпр мителем 7. Врем импульсна схема устройства дополнена транзистором 8, включенным между коллектором транзистора 9 и сопротивлением 10. Эмиттер транзистора 8 соединен с коллектором транThe zero-sequence current protection device consists of a set of current transformers, forming 1, their zero sequence current filter 1, a transreactor with a magnetic shunt 2, an inductive-capacitance filter of a harmonic nerve 3 with a rectifier 4, a reacting organ 5 and a time-multiplier circuit 6 with a rectifier 7. The impulse time of the device is supplemented by a transistor 8 connected between the collector of transistor 9 and the resistance 10. The emitter of transistor 8 is connected to the collector trans
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2018826A SU497677A2 (en) | 1974-04-26 | 1974-04-26 | Device for current protection zero sequence |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU2018826A SU497677A2 (en) | 1974-04-26 | 1974-04-26 | Device for current protection zero sequence |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU12512A Addition SU65942A1 (en) | 1937-12-01 | 1937-12-01 | Installation for contact oxidation of sulfur dioxide |
Publications (1)
Publication Number | Publication Date |
---|---|
SU497677A2 true SU497677A2 (en) | 1975-12-30 |
Family
ID=20582863
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU2018826A SU497677A2 (en) | 1974-04-26 | 1974-04-26 | Device for current protection zero sequence |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU497677A2 (en) |
-
1974
- 1974-04-26 SU SU2018826A patent/SU497677A2/en active
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