PL428547A1 - Directional earth fault protection system for low voltage IT networks - Google Patents

Directional earth fault protection system for low voltage IT networks

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Publication number
PL428547A1
PL428547A1 PL428547A PL42854719A PL428547A1 PL 428547 A1 PL428547 A1 PL 428547A1 PL 428547 A PL428547 A PL 428547A PL 42854719 A PL42854719 A PL 42854719A PL 428547 A1 PL428547 A1 PL 428547A1
Authority
PL
Poland
Prior art keywords
voltage
networks
protection system
fault protection
zero
Prior art date
Application number
PL428547A
Other languages
Polish (pl)
Other versions
PL237516B1 (en
Inventor
Łukasz Sapuła
Maciej Rup
Grzegorz Wojtaś
Radosław Przybysz
Tomasz Kowol
Michał Brocki
Przemysław Angielczyk
Anna Kołtun
Paweł Wlazło
Original Assignee
Instytut Tele- I Radiotechniczny
Opa-Row Spółka Z Ograniczoną Odpowiedzialnością
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Instytut Tele- I Radiotechniczny, Opa-Row Spółka Z Ograniczoną Odpowiedzialnością filed Critical Instytut Tele- I Radiotechniczny
Priority to PL428547A priority Critical patent/PL237516B1/en
Publication of PL428547A1 publication Critical patent/PL428547A1/en
Publication of PL237516B1 publication Critical patent/PL237516B1/en

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  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Resistance Or Impedance (AREA)

Abstract

Układ zabezpieczenia ziemnozwarciowego kierunkowego przeznaczony do sieci IT niskiego napięcia zbudowany jest z pomiarowego przekładnika prądowego niskiego napięcia (PP) będącego filtrem składowej zerowej prądu połączonego z torem pomiarowym prądu (I0) wysokiej czułości sterownika elektroenergetycznej automatyki zabezpieczeniowej (EAZ), z wbudowanym torem pomiaru napięcia (U0) o wysokiej rezystancji wejściowej 10 Mohm. Jako filtr zerowo - napięciowy wykorzystany jest potencjał punktu zerowego uzwojenia niskiego napięcia transformatora trójfazowego (TR).The directional earth-fault protection system designed for low-voltage IT networks is made of a low-voltage measuring current transformer (PP), which is a zero-sequence current filter connected with the current measuring circuit (I0) of high sensitivity power automation protection (EAZ) controller, with an in-built voltage measuring circuit ( U0) with a high input resistance of 10 Mohm. The zero-point potential of the low-voltage winding of a three-phase transformer (TR) is used as the zero-voltage filter.

PL428547A 2019-01-10 2019-01-10 Directional earth fault protection system for low voltage IT networks PL237516B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL428547A PL237516B1 (en) 2019-01-10 2019-01-10 Directional earth fault protection system for low voltage IT networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL428547A PL237516B1 (en) 2019-01-10 2019-01-10 Directional earth fault protection system for low voltage IT networks

Publications (2)

Publication Number Publication Date
PL428547A1 true PL428547A1 (en) 2020-07-13
PL237516B1 PL237516B1 (en) 2021-04-19

Family

ID=71512405

Family Applications (1)

Application Number Title Priority Date Filing Date
PL428547A PL237516B1 (en) 2019-01-10 2019-01-10 Directional earth fault protection system for low voltage IT networks

Country Status (1)

Country Link
PL (1) PL237516B1 (en)

Also Published As

Publication number Publication date
PL237516B1 (en) 2021-04-19

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