RU94040068A - Phase-to-ground fault protective device for insulated-neutral mains - Google Patents

Phase-to-ground fault protective device for insulated-neutral mains

Info

Publication number
RU94040068A
RU94040068A RU94040068/07A RU94040068A RU94040068A RU 94040068 A RU94040068 A RU 94040068A RU 94040068/07 A RU94040068/07 A RU 94040068/07A RU 94040068 A RU94040068 A RU 94040068A RU 94040068 A RU94040068 A RU 94040068A
Authority
RU
Russia
Prior art keywords
elements
gate
zero
diode assembly
auxiliary
Prior art date
Application number
RU94040068/07A
Other languages
Russian (ru)
Other versions
RU2082269C1 (en
Inventor
В.Ф. Бухтояров
Г.И. Токарев
В.И. Удавихин
Original Assignee
Акционерное общество по производству огнеупоров "Магнезит"
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 Акционерное общество по производству огнеупоров "Магнезит" filed Critical Акционерное общество по производству огнеупоров "Магнезит"
Priority to RU94040068A priority Critical patent/RU2082269C1/en
Publication of RU94040068A publication Critical patent/RU94040068A/en
Application granted granted Critical
Publication of RU2082269C1 publication Critical patent/RU2082269C1/en

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

FIELD: electrical engineering. SUBSTANCE: device has zero-sequence current transformers 3,4 mounted on connections 1,2, current-to-DC voltage changers 5,6, integrating elements 7,8, threshold elements 9,10, coincidence gates 11, 12, pulse stretchers 13, 14, final elements 15,16, NOR gate 17, NOT gate 18, OR gate 19, INHIBIT gate 20, starting element 21, low-frequency blocking unit 22, zero-sequence potential transformer 23, main reference-voltage source 24 and auxiliary one 25, making switch 26 and breaking switch 27, diode assembly 28. Newly introduced are OR, NOT, INHIBIT gates, low-frequency blocking unit, diode assembly auxiliary reference-voltage source, making and breaking switches. EFFECT: enlarged functional capabilities of device, improved accuracy of locating faulty connection. 1 cl, 1 dwg

Claims (1)

Изобретение относится к области электротехники и может быть использовано для защиты от однофазного замыкания на землю в сети с изолированной нейтралью. Устройство для защиты от однофазного замыкания на землю содержит установленные на присоединениях 1 и 2 трансформаторы 3 и 4 тока нулевой последовательности, преобразователи тока в выпрямленное напряжение 5 и 6, интегрирующие 7 и 8 элементы, пороговые 9 и 10 элементы, элементы 11 и 12 совпадения, расширители 13 и 14 импульсов, исполнительные органы 15 и 16, элементы ИЛИ-НЕ 17, НЕ 18, ИЛИ 19 и Запрет 20, пусковой орган 21, элемент 22 блокировки низкой частоты, трансформатор 23 напряжения нулевой последовательности, основной 24 и вспомогательный 25 источники опорного напряжения, замыкающий 26 и размыкающий 27 ключи, диодная сборка 28. Введение в устройство для защиты элементов ИЛИ, НЕ, Запрет и блокировки низкой частоты, диодной сборки, вспомогательного источника опорного напряжения, замыкающего и размыкающего ключей позволило существенно расширить функциональные возможности устройства и повысить точность определения поврежденного присоединения.The invention relates to the field of electrical engineering and can be used to protect against a single-phase earth fault in a network with isolated neutral. The device for protection against a single-phase earth fault contains zero-sequence current transformers 3 and 4 installed on connections 1 and 2, current-to-rectified voltage converters 5 and 6, integrating elements 7 and 8, threshold elements 9 and 10, coincidence elements 11 and 12, pulse expanders 13 and 14, actuators 15 and 16, elements OR-NOT 17, NOT 18, OR 19 and Prohibition 20, trigger 21, low-frequency blocking element 22, zero-sequence voltage transformer 23, main 24 and auxiliary 25 sources of reference voltage, closing 26 and opening 27 keys, diode assembly 28. Introduction to the device for protecting elements OR, NOT, Locking and blocking low frequencies, diode assembly, auxiliary voltage reference, closing and opening keys allowed to significantly expand the functionality of the device and improve accuracy definitions of a damaged connection.
RU94040068A 1994-10-26 1994-10-26 Device for protection against single-phase short- circuit to ground in power supply line with insulated neutral wire RU2082269C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94040068A RU2082269C1 (en) 1994-10-26 1994-10-26 Device for protection against single-phase short- circuit to ground in power supply line with insulated neutral wire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94040068A RU2082269C1 (en) 1994-10-26 1994-10-26 Device for protection against single-phase short- circuit to ground in power supply line with insulated neutral wire

Publications (2)

Publication Number Publication Date
RU94040068A true RU94040068A (en) 1996-09-10
RU2082269C1 RU2082269C1 (en) 1997-06-20

Family

ID=20162099

Family Applications (1)

Application Number Title Priority Date Filing Date
RU94040068A RU2082269C1 (en) 1994-10-26 1994-10-26 Device for protection against single-phase short- circuit to ground in power supply line with insulated neutral wire

Country Status (1)

Country Link
RU (1) RU2082269C1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2614528C1 (en) * 2016-03-31 2017-03-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Омский государственный технический университет" Device for protecting power transmission of two parallel-connected cables in electrical network with insulated neutral of single-phase ground fault

Also Published As

Publication number Publication date
RU2082269C1 (en) 1997-06-20

Similar Documents

Publication Publication Date Title
Kovan et al. Mitigation of geomagnetically induced currents by neutral switching
NO931329D0 (en) OVERSTROEMSBESKYTTELSESANORDNING
RU94040068A (en) Phase-to-ground fault protective device for insulated-neutral mains
CA2020977A1 (en) Sectionalizer control
RU95111237A (en) Single-phase-to-ground fault protective device for insulated-neutral line
RU2071624C1 (en) Gear for centralized directional protection against fault to ground
SU904066A1 (en) Device for centralized protection from earthing in the network with insulated or compensated neutral wire
SU1270830A1 (en) Device for compensating active earth-leakage current in electric network
SU1224891A1 (en) Device for directional earth leakage protection in isolated neutral system
SU989649A1 (en) Device for current protection of zero sequence from short-circuiting in network with grounded neutral
SU1697169A1 (en) Device for protection against single-phase short-circuit to ground in network with insulated neutral
SU1737599A1 (en) Device for protection of network with insulated neutrals against single-phase short-circuit to ground
RU58269U1 (en) SELECTIVE EARTH PROTECTION DEVICE
SU1686575A1 (en) Device for protective switching-off of a c network in case of current leak to ground
SU1427460A1 (en) Arrangement for protecting men from electric shocks in three-phase mains
SU1145400A2 (en) Device for protection against open circuit and earth leakage in isolated neutral system
SU1317537A1 (en) Device for phase-to-phase short-circuit protection of different output electric power lines
RU73556U1 (en) PROTECTIVE CIRCUIT BREAKER DURING CIRCUIT TO EARTH ON ELECTRIC ACTIONS OF THREE-PHASE AC
SU1649621A1 (en) Device for zero-sequence instantaneous current protection for two single-line-to-ground faults behind different branches of split reactor in ungrounded network with protection circuits responding to this type of fault with or without time delay
SU1614066A1 (en) Device for protecting against signle-phase ground faults in lower-voltage network with isolated neutral
SU1394311A1 (en) Device for protecting against in-phase short circuit of different circuits in bicircuit power transmission line
SU815827A1 (en) Device for protective disconnection of electric equipment in electric network withinsulated neutral wire
SU700893A1 (en) Power-diode converter protection device
RU93043935A (en) DEVICE FOR PROTECTION AGAINST A SINGLE-PHASE ON-EARTH CIRCUIT IN THE NETWORK WITH ISOLATED NEUTRAL
SU815824A1 (en) Device for grounding protection of network

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20131027