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RU2003113030A - DEVICE FOR CHECKING MEASURING CURRENT TRANSFORMERS - Google Patents

DEVICE FOR CHECKING MEASURING CURRENT TRANSFORMERS

Info

Publication number
RU2003113030A
RU2003113030A RU2003113030/28A RU2003113030A RU2003113030A RU 2003113030 A RU2003113030 A RU 2003113030A RU 2003113030/28 A RU2003113030/28 A RU 2003113030/28A RU 2003113030 A RU2003113030 A RU 2003113030A RU 2003113030 A RU2003113030 A RU 2003113030A
Authority
RU
Russia
Prior art keywords
current
shunt
inductive
current transformer
circuit
Prior art date
Application number
RU2003113030/28A
Other languages
Russian (ru)
Other versions
RU2244319C1 (en
Inventor
Евгений Александрович Ломтев
Дмитрий Иванович Нефедьев
Original Assignee
Пензенский государственный университет
Filing date
Publication date
Application filed by Пензенский государственный университет filed Critical Пензенский государственный университет
Priority to RU2003113030/28A priority Critical patent/RU2244319C1/en
Priority claimed from RU2003113030/28A external-priority patent/RU2244319C1/en
Publication of RU2003113030A publication Critical patent/RU2003113030A/en
Application granted granted Critical
Publication of RU2244319C1 publication Critical patent/RU2244319C1/en

Links

Claims (1)

Устройство для поверки измерительных трансформаторов тока, содержащее источник переменного тока, шунт в цепи первичной обмотки поверяемого измерительного трансформатора тока, выполненный в виде трех параллельно соединенных резисторов, шунт в цепи вторичной обмотки измерительного трансформатора тока, вспомогательный трансформатор тока, электромагнитный компаратор токов и нулевой индикатор, отличающееся тем, что в устройство введен индуктивный делитель тока с известным коэффициентом деления, первичная обмотка которого подключена последовательно с первичной обмоткой измерительного трансформатора тока, вторичная обмотка подключена к токовым зажимам шунта, выполненного в виде трех параллельно соединенных резисторов с ненормируемой погрешностью с возможностью их отключения из цепи вторичной обмотки индуктивного делителя тока и изменения коэффициента преобразования шунта, при этом их токовые и потенциальные зажимы соединены раздельно, а номинальное значение сопротивления третьего резистора с большим сопротивлением шунта в цепи вторичной обмотки индуктивного делителя тока равно номинальному значению сопротивления шунта в цепи вторичной обмотки измерительного трансформатора тока, умноженному на коэффициент деления индуктивного делителя тока.A device for checking measuring current transformers containing an AC source, a shunt in the primary winding circuit of the verified measuring current transformer, made in the form of three parallel-connected resistors, a shunt in the secondary winding circuit of the measuring current transformer, auxiliary current transformer, electromagnetic current comparator and zero indicator, characterized in that an inductive current divider with a known division coefficient is introduced into the device, the primary winding of which is connected to therefore, with the primary winding of the measuring current transformer, the secondary winding is connected to the current terminals of the shunt, made in the form of three parallel-connected resistors with an irregular error with the possibility of disconnecting them from the secondary winding of the inductive current divider and changing the conversion coefficient of the shunt, while their current and potential clamps are connected separately, and the nominal value of the resistance of the third resistor with a large shunt resistance in the secondary circuit of the inductive d current divisor equal to the nominal value of the resistance in the shunt circuit of the secondary current transformer windings multiplied by the division factor of the inductive current divider.
RU2003113030/28A 2003-05-05 2003-05-05 Device for calibration testing instrument current transformer RU2244319C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2003113030/28A RU2244319C1 (en) 2003-05-05 2003-05-05 Device for calibration testing instrument current transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2003113030/28A RU2244319C1 (en) 2003-05-05 2003-05-05 Device for calibration testing instrument current transformer

Publications (2)

Publication Number Publication Date
RU2003113030A true RU2003113030A (en) 2004-12-10
RU2244319C1 RU2244319C1 (en) 2005-01-10

Family

ID=34881118

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2003113030/28A RU2244319C1 (en) 2003-05-05 2003-05-05 Device for calibration testing instrument current transformer

Country Status (1)

Country Link
RU (1) RU2244319C1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103543428B (en) * 2012-07-13 2017-01-25 天门市电工仪器仪表研究所 Miniature current transformer ratio error self-calibration system
CN104166115B (en) * 2014-08-22 2017-03-08 广州供电局有限公司 The signal verification device of capacitive apparatus testing instrument for electrified
CN106199306B (en) * 2016-07-01 2021-04-23 中国电力科学研究院 A system and method for verifying loop condition monitoring devices
CN106405469A (en) * 2016-10-10 2017-02-15 中国电力科学研究院 Variable-ratio magnetic potential comparison type transformer calibration system capable of self-calibration
CN112083210B (en) * 2020-06-15 2023-12-05 上海市计量测试技术研究院 Analog standard shunt for measuring broadband current and its measurement method
CN112213676A (en) * 2020-09-27 2021-01-12 上海置信智能电气有限公司 A basic error test method and device for a 10kV AC voltage sensor in a distribution network
CN113030832A (en) * 2021-03-22 2021-06-25 苏州电器科学研究院股份有限公司 Device and method for detecting composite error of current transformer
CN113447878B (en) * 2021-06-18 2023-12-01 中国电力科学研究院有限公司 Error measurement equipment and method for current transformer
CN115394030A (en) * 2022-08-02 2022-11-25 山东鑫泽消防技术服务有限公司 A residual current electrical fire detector with built-in re-inspection function and its application method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1334099A1 (en) * 1985-11-19 1987-08-30 Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Device for measuring error of high-voltage scale converter
RU2024890C1 (en) * 1990-09-14 1994-12-15 Уфимский государственный авиационный технический университет Device for measuring statistical error of measuring devices
RU2086996C1 (en) * 1994-04-11 1997-08-10 Дмитрий Иванович Нефедьев Device for testing high-voltage measuring voltage transformers
RU2192020C1 (en) * 2001-02-19 2002-10-27 Нефедьев Дмитрий Иванович Device for verifying current transformers
FR2827388B1 (en) * 2001-07-10 2003-11-14 Alstom CIRCUIT FOR MEASURING THE HOMOPOLAR CURRENT OF A THREE-PHASE ELECTRIC CURRENT LINE

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