AT144602B - Arrangement for testing current transformers. - Google Patents
Arrangement for testing current transformers.Info
- Publication number
- AT144602B AT144602B AT144602DA AT144602B AT 144602 B AT144602 B AT 144602B AT 144602D A AT144602D A AT 144602DA AT 144602 B AT144602 B AT 144602B
- Authority
- AT
- Austria
- Prior art keywords
- arrangement
- current transformers
- testing current
- voltages
- currents
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
- H01F27/422—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers
- H01F27/425—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils for instrument transformers for voltage transformers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Ac-Ac Conversion (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
<Desc/Clms Page number 1>
Anordnung zum Prüfen von Stromwandler.
Die im Stammpatent Nr. 141447 beschriebenen Anordnungen für Nullmethoden ermöglichen es, die gegenseitigen Abweichungen nach Grösse und Phase zweier annähernd gleicher Ströme, nämlich der
EMI1.1
auch dazu benutzen, die gegenseitigen Abweichungen nach Grösse und Phase zweier annähernd gleicher Spannungen zu bestimmen, z. B. der Selmndärspannungen zweier Spannungswandler, wenn man diese Sekundärspannungen in Ströme verwandelt, und dann in der beschriebenen Art misst.
In den Fig. 1 und 2 sind zwei Beispiele dargestellt ; N ist der Normalspannungswandler, X der Prüfling gleichen Nennübersetzungsverhältnisses. Über je einen Vonviderstand Rv frihren die beiden Spannungen der Stromwandlerprüfschaltung zwei Ströme zu, derart, dass ihre Differenz den Diagonalwiderstand R durchfliesst. Wenn man durch passende Bemessung von Grösse und Phase der Vorwiderstände Rv dafür sorgt, dass die relativen Phasen- und Grössenverhältnisse der Ströme denjenigen der Spannungen entsprechen, so lassen sich mit allen, im Stammpatent und im 1. Zusatzpatent Nr. 142842 beschriebenen Anordnungen auch die Fehler der Spannungswandler ermitteln.
In Fig. 2 speisen die Sekundärspannungen über Vorwiderstände Rv die Primärwicklungen kleiner Stromwandler W, deren Sekundärwicklungen an die bisherige Stromwandlerprüfschaltung angeschlossen werden. Man kann Wandler und Vorwiderstände so abgleichen, dass der im Diagonalwiderstande R fliessende Differenzstrom nach Grösse und Phase der Differenzspannung der Spannungswandler entspricht.
Etwaige Ungleichheiten der Belastungskreise lassen sich durch Vertauschen und wiederholte Messungen beseitigen.
PATENT-ANSPRÜCHE :
1. Anwendung der Anordnung zum Prüfen von Stromwandlern gemäss Patent Nr. 141447 oder dem Patente Nr. 142842 für die Prüfung von Spannungswandlem mit einem Normalwandler, dadurch gekennzeichnet, dass die Sekundärspannungen von Normalspannungswandler und Prüfling in Ströme von gleichen Phase- und Grössenverhältnissen verwandelt. werden, wie sie die Spannungen zueinander hatten, und dass diese Ströme den Stromwandlerprüfschaltungen zugeführt werden.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Arrangement for testing current transformers.
The arrangements for zero methods described in the parent patent no. 141447 make it possible to determine the mutual deviations according to size and phase of two approximately equal currents, namely the
EMI1.1
can also be used to determine the mutual deviations according to size and phase of two approximately equal voltages, e.g. B. the self-contained voltages of two voltage transformers, if these secondary voltages are converted into currents and then measured in the manner described.
Two examples are shown in FIGS. 1 and 2; N is the normal voltage converter, X the test object with the same nominal transmission ratio. The two voltages of the current transformer test circuit feed two currents via a supply resistor Rv each, in such a way that their difference flows through the diagonal resistor R. If, by appropriately dimensioning the size and phase of the series resistors Rv, it is ensured that the relative phase and size relationships of the currents correspond to those of the voltages, then all the arrangements described in the parent patent and in the 1st additional patent no determine the voltage transformer.
In FIG. 2, the secondary voltages feed the primary windings of small current transformers W via series resistors Rv, the secondary windings of which are connected to the previous current transformer test circuit. Converters and series resistors can be adjusted in such a way that the differential current flowing in the diagonal resistor R corresponds to the size and phase of the differential voltage of the voltage converters.
Any inequalities in the load circuits can be eliminated by swapping and repeated measurements.
PATENT CLAIMS:
1. Application of the arrangement for testing current transformers according to Patent No. 141447 or Patent No. 142842 for testing voltage transformers with a standard transformer, characterized in that the secondary voltages from the standard voltage transformer and the test object are converted into currents of the same phase and size ratios. how they had the voltages to each other and that these currents are fed to the current transformer test circuits.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEH136984D DE615752C (en) | 1933-07-29 | 1933-07-29 | Method for testing current transformers with the aid of a standard transformer with the same transmission ratio using a differential circuit |
DEH138519D DE634507C (en) | 1933-07-29 | 1933-12-31 | Extension of the method for testing current fluctuations according to patent 615752 to the testing of voltage converters with the help of a standard converter |
Publications (1)
Publication Number | Publication Date |
---|---|
AT144602B true AT144602B (en) | 1936-02-10 |
Family
ID=34066201
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT141447D AT141447B (en) | 1933-07-29 | 1934-07-13 | Arrangement for testing current transformers. |
AT144602D AT144602B (en) | 1933-07-29 | 1934-08-07 | Arrangement for testing current transformers. |
AT142842D AT142842B (en) | 1933-07-29 | 1934-08-07 | Arrangement for testing current transformers. |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT141447D AT141447B (en) | 1933-07-29 | 1934-07-13 | Arrangement for testing current transformers. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT142842D AT142842B (en) | 1933-07-29 | 1934-08-07 | Arrangement for testing current transformers. |
Country Status (4)
Country | Link |
---|---|
AT (3) | AT141447B (en) |
CH (3) | CH176677A (en) |
DE (2) | DE615752C (en) |
GB (2) | GB424810A (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1028221B (en) * | 1954-06-21 | 1958-04-17 | Hartmann & Braun Ag | Current transformer measuring device based on the principle of voltage compensation from Schering-Alberti |
DE1038187B (en) * | 1954-06-29 | 1958-09-04 | Hartmann & Braun Ag | Current transformer measuring device based on the principle of voltage compensation from Schering-Alberti |
DE1027785B (en) * | 1954-07-31 | 1958-04-10 | Hartmann & Braun Ag | Device for measuring the translation and angle error of current and voltage transformers |
DE976857C (en) * | 1955-04-20 | 1964-06-18 | Licentia Gmbh | Circuit arrangement for measuring the error sizes of current and voltage transformers |
US2896156A (en) * | 1956-05-04 | 1959-07-21 | Superior Electric Co | Transformer test circuit |
AT389397B (en) * | 1980-11-28 | 1989-11-27 | Moser Glaser & Co Ag | ERROR COMPENSATED VOLTAGE CONVERTER FOR HIGH VOLTAGE |
CN103293507B (en) * | 2012-03-02 | 2016-08-31 | 北京瑞恒超高压电器研究所(普通合伙) | The online test method of current transformer error |
CN103267958B (en) * | 2013-04-27 | 2016-01-20 | 广东电网公司电力科学研究院 | The circuit of measuring voltage transformer voltage coefficient and method |
CN104155625B (en) * | 2014-07-31 | 2016-04-20 | 国家电网公司 | For the servicing unit of current mutual inductor with high transforming ratio field-checking in GIS |
CN105044408B (en) * | 2015-06-30 | 2017-12-19 | 国家电网公司 | A kind of extra-high voltage detecting current transformer flows up device with high current |
CN106226638A (en) * | 2016-08-26 | 2016-12-14 | 四川和中电力科技有限公司 | A kind of low voltage mutual inductor measurement loop state on_line monitoring system |
CN107192974B (en) * | 2017-07-19 | 2023-06-09 | 云南电网有限责任公司电力科学研究院 | Integrated voltage and current standard transformer |
CN109407034B (en) * | 2018-12-12 | 2023-09-08 | 云南电网有限责任公司昆明供电局 | Primary and secondary synchronous wiring device of large-current transformer |
CN109975736B (en) * | 2019-01-15 | 2024-02-06 | 红相股份有限公司 | Mutual inductor error testing system in GIS based on frequency conversion anti-interference technology |
CN111693925B (en) * | 2020-07-20 | 2023-01-03 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Current transformer detection operation platform and multi-position top-speed current transformer calibration system |
CN111948593B (en) * | 2020-07-27 | 2023-07-28 | 国网浙江省电力有限公司营销服务中心 | Exciting current measuring method for current transformer |
CN112068062B (en) * | 2020-09-10 | 2023-01-03 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Mutual inductor calibration system and calibration method |
CN114814706B (en) * | 2022-06-23 | 2022-11-04 | 武汉磐电科技股份有限公司 | Testing device and method for online self-calibration of mutual inductor |
CN116338556B (en) * | 2023-05-26 | 2023-09-15 | 上海置信电气有限公司 | Error tracing device and method for wide-range standard current transformer |
-
1933
- 1933-07-29 DE DEH136984D patent/DE615752C/en not_active Expired
- 1933-12-31 DE DEH138519D patent/DE634507C/en not_active Expired
-
1934
- 1934-07-09 CH CH176677D patent/CH176677A/en unknown
- 1934-07-13 AT AT141447D patent/AT141447B/en active
- 1934-07-27 GB GB22038/34A patent/GB424810A/en not_active Expired
- 1934-08-04 CH CH181579D patent/CH181579A/en unknown
- 1934-08-04 CH CH176982D patent/CH176982A/en unknown
- 1934-08-07 AT AT144602D patent/AT144602B/en active
- 1934-08-07 AT AT142842D patent/AT142842B/en active
- 1934-12-28 GB GB37197/34A patent/GB439661A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE634507C (en) | 1936-08-28 |
AT141447B (en) | 1935-04-25 |
CH176677A (en) | 1935-04-30 |
DE615752C (en) | 1935-07-12 |
GB439661A (en) | 1935-12-11 |
AT142842B (en) | 1935-09-25 |
CH176982A (en) | 1935-05-15 |
CH181579A (en) | 1935-12-31 |
GB424810A (en) | 1935-02-28 |
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