SU881933A1 - Three-phase ac network with grounded neutral wire for power supply of symmetrical loads - Google Patents
Three-phase ac network with grounded neutral wire for power supply of symmetrical loads Download PDFInfo
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- SU881933A1 SU881933A1 SU792828466A SU2828466A SU881933A1 SU 881933 A1 SU881933 A1 SU 881933A1 SU 792828466 A SU792828466 A SU 792828466A SU 2828466 A SU2828466 A SU 2828466A SU 881933 A1 SU881933 A1 SU 881933A1
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Description
(54) ТРЕХФАЗНАЯ СЕТЬ ПЕРЕМЕННОГО ТОКА С ЗАЗЕМЛЕННОЙ НЕЙТРАЛЬЮ ДЛЯ ПИТАНИЯ СИММЕТРИЧНЫХ НАГРУЗОК(54) THREE-PHASE AC NETWORK WITH GROUNDED NEUTRAL FOR SUPPLY SYMMETRIC LOADS
1one
Изобретение относитс к электротехнике и может быть использовано дл повышени безопасности электрических непрот женных сетей переменного тока напр жением до 1ООО В, имеющих зазем/кнную нейтраль и осуществл ющих питаниеThe invention relates to electrical engineering and can be used to increase the safety of electrical non-stressed AC mains with voltage up to 1OOO V, having a ground / key neutral and supplying power.
трехфазных симметричных нагрузок (потребителей ), в электроустановках всех отраслей народного хоз йства.three-phase symmetric loads (consumers), in electrical installations of all branches of the national economy.
Известны сети переменного тока, выполненные с изолированной компенсированной и глухозаземленной нейтралью 111.Known alternating current network, made with isolated compensated and deafened neutral 111.
Наиболее близким к предлагаемому по технической сущности вл ютс сети переменного тока с заземленной нейтралью, содержащие трехфазный источник переменного тока (трансформатор или. генератор), нейтраль которого присоединена к заземл ющему устройству. Электрооборудование питающеес от таких сетей, выполн етс с занулением, В системах с зану/юнием при однофазных коротких замыкани х на землю или корпус возникают услови ал срабатывани максимальной защиты 23 .Closest to the proposed technical entity are AC mains with a grounded neutral, containing a three-phase AC source (transformer or generator), the neutral of which is connected to the grounding device. Electrical equipment powered by such networks is performed with a zeroing. In systems with a zan / jun during single-phase short circuits on the ground or a housing, conditions of maximum protection 23 are triggered.
Однако в таких сет х изол5ши не вл етс защитной мерой при однофазном касании человека к сети. Поражающий ток через человека в этом случае не зависит ни от сопротивлени изолгщии, ни от емкости сети относительно земли, а определ етс только фазным напр жением сети Ucjj, сопротивлением самого человека ftHowever, in such networks, isolates are not a protective measure when a single-phase person touches the network. In this case, the striking current through a person does not depend on the resistance of the insulation, nor on the network capacity relative to the earth, but is determined only by the phase voltage of the network Ucjj, the resistance of the person himself
и сопротивлением.{гулевого провода иand resistance. {hulevy wire and
о- ,, Цфo- ,, ff
10ten
Jr.Jr
R/J- + ROR / J- + RO
В этом выражении сопротивлением заземлени нейтрали можно пренебречь, так как оно не превышает 1О Ом, а сопротивление человека Rj 100О Ом, т.е. прак15 тически ток через человека определ етс фазным напр жением и сопротивлением самого человека.In this expression, the neutral grounding resistance can be neglected, since it does not exceed 1O ohms, and the human resistance Rj is 100O ohms, i.e. In practice, the current through a person is determined by the phase voltage and the resistance of the person himself.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792828466A SU881933A1 (en) | 1979-10-18 | 1979-10-18 | Three-phase ac network with grounded neutral wire for power supply of symmetrical loads |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792828466A SU881933A1 (en) | 1979-10-18 | 1979-10-18 | Three-phase ac network with grounded neutral wire for power supply of symmetrical loads |
Publications (1)
Publication Number | Publication Date |
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SU881933A1 true SU881933A1 (en) | 1981-11-15 |
Family
ID=20854398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU792828466A SU881933A1 (en) | 1979-10-18 | 1979-10-18 | Three-phase ac network with grounded neutral wire for power supply of symmetrical loads |
Country Status (1)
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SU (1) | SU881933A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102157915A (en) * | 2011-04-11 | 2011-08-17 | 河南省电力公司驻马店供电公司 | Zero line break protection device |
WO2020234044A1 (en) * | 2019-05-17 | 2020-11-26 | Abb Power Grids Switzerland Ag | Dc current damper for a medium voltage or high voltage transformer |
-
1979
- 1979-10-18 SU SU792828466A patent/SU881933A1/en active
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102157915A (en) * | 2011-04-11 | 2011-08-17 | 河南省电力公司驻马店供电公司 | Zero line break protection device |
WO2020234044A1 (en) * | 2019-05-17 | 2020-11-26 | Abb Power Grids Switzerland Ag | Dc current damper for a medium voltage or high voltage transformer |
US11757280B2 (en) | 2019-05-17 | 2023-09-12 | Hitachi Energy Switzerland Ag | DC current damper for a medium voltage or high voltage transformer |
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