JPS54118520A - Device for measuring transformation ratio of transformer for dc measuring instrument - Google Patents
Device for measuring transformation ratio of transformer for dc measuring instrumentInfo
- Publication number
- JPS54118520A JPS54118520A JP2538378A JP2538378A JPS54118520A JP S54118520 A JPS54118520 A JP S54118520A JP 2538378 A JP2538378 A JP 2538378A JP 2538378 A JP2538378 A JP 2538378A JP S54118520 A JPS54118520 A JP S54118520A
- Authority
- JP
- Japan
- Prior art keywords
- transformer
- voltage
- transformation ratio
- voltages
- measuring
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
PURPOSE: To increased the precision of measurement of the transformation ratio by comparing the primary and secondary side DC voltages of the transformer with a null method using a voltage comparator circuit.
CONSTITUTION: A DC voltage M1 proportional to the primary side DC input to a transformer 5 for a DC measuring instrument and a DC voltage M2 proportional to the secondary side output are obtained, and one of these DC voltages and a DC voltage taken out from the other voltage through a voltage divider consisiting of resistors 9b and 9g are compared with a voltage comparator circuit 9a for obtaining the transformation ratio of the transformer from the resistance ratio of the voltage divider by making both the DC voltages equal. In this way, precise measurement of the transformation ratio of the transformer can be obtained by comparing the primary and secondary side DC voltages of the transformer with a null method using a voltage comparator circuit and deriving the transformation ratio of the transformer from the resistance ratio of the voltage divider at that time.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2538378A JPS54118520A (en) | 1978-03-08 | 1978-03-08 | Device for measuring transformation ratio of transformer for dc measuring instrument |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2538378A JPS54118520A (en) | 1978-03-08 | 1978-03-08 | Device for measuring transformation ratio of transformer for dc measuring instrument |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54118520A true JPS54118520A (en) | 1979-09-14 |
Family
ID=12164332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2538378A Pending JPS54118520A (en) | 1978-03-08 | 1978-03-08 | Device for measuring transformation ratio of transformer for dc measuring instrument |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54118520A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711636A (en) * | 1993-06-23 | 1995-01-13 | Toda Constr Co Ltd | Construction work of pile by use of existing pile |
CN102565557A (en) * | 2012-02-22 | 2012-07-11 | 明珠电气有限公司 | Method and device for testing transformation ratio of dry type transformer |
CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | Small-output-capacity current mutual inductance transformation ratio testing method and device |
CN109061356A (en) * | 2018-09-26 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer operational taps |
-
1978
- 1978-03-08 JP JP2538378A patent/JPS54118520A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0711636A (en) * | 1993-06-23 | 1995-01-13 | Toda Constr Co Ltd | Construction work of pile by use of existing pile |
CN102565557A (en) * | 2012-02-22 | 2012-07-11 | 明珠电气有限公司 | Method and device for testing transformation ratio of dry type transformer |
CN106093609A (en) * | 2016-08-04 | 2016-11-09 | 深圳供电局有限公司 | Small-output-capacity current mutual inductance transformation ratio testing method and device |
CN109061356A (en) * | 2018-09-26 | 2018-12-21 | 云南电网有限责任公司电力科学研究院 | A kind of detection method and device of distribution transformer operational taps |
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