RU93027584A - DEVICE FOR PROTECTION OF LOW-VOLTAGE AUTOMATIC SWITCH - Google Patents

DEVICE FOR PROTECTION OF LOW-VOLTAGE AUTOMATIC SWITCH

Info

Publication number
RU93027584A
RU93027584A RU93027584/07A RU93027584A RU93027584A RU 93027584 A RU93027584 A RU 93027584A RU 93027584/07 A RU93027584/07 A RU 93027584/07A RU 93027584 A RU93027584 A RU 93027584A RU 93027584 A RU93027584 A RU 93027584A
Authority
RU
Russia
Prior art keywords
input
output
operational amplifier
protection
low
Prior art date
Application number
RU93027584/07A
Other languages
Russian (ru)
Other versions
RU2091948C1 (en
Inventor
В.В. Кочетков
А.Н. Солдатов
Original Assignee
Акционерное общество "Контактор"
Filing date
Publication date
Application filed by Акционерное общество "Контактор" filed Critical Акционерное общество "Контактор"
Priority to RU93027584A priority Critical patent/RU2091948C1/en
Priority claimed from RU93027584A external-priority patent/RU2091948C1/en
Publication of RU93027584A publication Critical patent/RU93027584A/en
Application granted granted Critical
Publication of RU2091948C1 publication Critical patent/RU2091948C1/en

Links

Claims (1)

Устройство относится к электроэнергетике, в частности к приспособлениям для релейной защиты. Устройство содержит трансформаторы тока, выход которых соединен с входом фильтра токов нулевой последовательности, выход фильтра - с входом первого операционного усилителя и входом амплитудного детектора, выход амплитудного детектора - с первым входом компаратора, второй вход которого соединен с источником тока смещения, выход первого операционного усилителя подключен к резистору RC-цепочки, общая точка резистора и конденсатора RC-цепочки подключена к входу второго операционного усилителя и через разделительный диод - к выходу компаратора, а выход второго операционного усилителя - к входу исполнительного органа. Изобретение обеспечивает повышение точности работы устройства в условиях изменения температуры окружающей среды.The device relates to the power industry, in particular to devices for relay protection. The device contains current transformers, the output of which is connected to the input of the zero-sequence current filter, the output of the filter to the input of the first operational amplifier and the input of the amplitude detector, the output of the amplitude detector to the first input of the comparator, the second input of which is connected to the bias current source connected to the resistor of the RC-chain, the common point of the resistor and capacitor of the RC-chain is connected to the input of the second operational amplifier and through a separation diode to the output of the comparator pa, and the output of the second operational amplifier - to the input of the executive body. The invention provides improved accuracy of the device in terms of changes in ambient temperature.
RU93027584A 1993-05-11 1993-05-11 Device protecting low-voltage automatic switch RU2091948C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU93027584A RU2091948C1 (en) 1993-05-11 1993-05-11 Device protecting low-voltage automatic switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU93027584A RU2091948C1 (en) 1993-05-11 1993-05-11 Device protecting low-voltage automatic switch

Publications (2)

Publication Number Publication Date
RU93027584A true RU93027584A (en) 1995-07-20
RU2091948C1 RU2091948C1 (en) 1997-09-27

Family

ID=20141964

Family Applications (1)

Application Number Title Priority Date Filing Date
RU93027584A RU2091948C1 (en) 1993-05-11 1993-05-11 Device protecting low-voltage automatic switch

Country Status (1)

Country Link
RU (1) RU2091948C1 (en)

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