JPH03117772U - - Google Patents
Info
- Publication number
- JPH03117772U JPH03117772U JP2673190U JP2673190U JPH03117772U JP H03117772 U JPH03117772 U JP H03117772U JP 2673190 U JP2673190 U JP 2673190U JP 2673190 U JP2673190 U JP 2673190U JP H03117772 U JPH03117772 U JP H03117772U
- Authority
- JP
- Japan
- Prior art keywords
- current transformer
- specimen
- dielectric loss
- resistance
- loss tangent
- 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
- 238000004804 winding Methods 0.000 claims description 5
- 230000010363 phase shift Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 3
- 230000007613 environmental effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Description
第１図は本考案の実施例を示す誘電正接測定装
置の全体構成図、第２図は位相補正部の一例を示
す回路図、第３図は位相補正部における位相補正
方法の他の例を説明するための補正データ特性図
、第４図は変流器の出力電流の位相ずれ特性を示
す特性図である。
１……計器用変流器、２……コア、４……巻線
、６……電線、７……電力ケーブル、８……抵抗
測定部、９……位相測定部、１０，１１……スイ
ツチ、１２……位相差検出部、１３……分圧器。
Fig. 1 is an overall configuration diagram of a dielectric loss tangent measuring device showing an embodiment of the present invention, Fig. 2 is a circuit diagram showing an example of a phase correction section, and Fig. 3 is another example of a phase correction method in the phase correction section. FIG. 4 is a correction data characteristic diagram for explaining the phase shift characteristic of the output current of the current transformer. 1... Instrument current transformer, 2... Core, 4... Winding wire, 6... Electric wire, 7... Power cable, 8... Resistance measuring section, 9... Phase measuring section, 10, 11... Switch, 12... Phase difference detection section, 13... Voltage divider.
Claims (1)
するのに使用する計器用変流器において、 磁気回路の巻線抵抗を測定する抵抗測定部と、
この抵抗測定部が測定した巻線抵抗値を基に基準
環境温度に対する変流器検出電流の位相ずれを補
正する位相補正部とを設けたことを特徴とする計
器用変流器。 (2) 電力ケーブル等の供試体と大地間に流れる
電流を検出する計器用変流器と、この計器用変流
器で検出した電流と前記供試体に印加されている
電圧との位相差を検出する位相差検出部とを備え
、前記位相差によつて前記供試体の誘電正接を測
定する誘電正接測定装置において、 上記計器用変流器の磁気回路の巻線抵抗を測定
する抵抗測定部と、この抵抗測定部が測定した巻
線抵抗値を基に基準環境温度に対する計器用変流
器検出電流の位相ずれを補正する位相補正部とを
設けたことを特徴とする計器用変流器を用いた誘
電正接測定装置。[Scope of Claim for Utility Model Registration] (1) In an instrument current transformer used to measure the dielectric loss tangent of a specimen such as a power cable, a resistance measuring part for measuring the winding resistance of a magnetic circuit;
An instrument current transformer comprising: a phase correction section that corrects a phase shift of the current transformer detection current with respect to a reference environmental temperature based on the winding resistance value measured by the resistance measurement section. (2) An instrument current transformer that detects the current flowing between a specimen such as a power cable and the earth, and a phase difference between the current detected by this instrument current transformer and the voltage applied to the specimen. A dielectric loss tangent measuring device that measures a dielectric loss tangent of the specimen based on the phase difference, the resistance measuring portion measuring a winding resistance of a magnetic circuit of the instrument current transformer. and a phase correction section that corrects a phase shift of the current detected by the instrument current transformer with respect to a reference environmental temperature based on the winding resistance value measured by the resistance measurement section. A dielectric loss tangent measurement device using
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2673190U JPH03117772U (en) | 1990-03-16 | 1990-03-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2673190U JPH03117772U (en) | 1990-03-16 | 1990-03-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03117772U true JPH03117772U (en) | 1991-12-05 |
Family
ID=31529611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2673190U Pending JPH03117772U (en) | 1990-03-16 | 1990-03-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03117772U (en) |
-
1990
- 1990-03-16 JP JP2673190U patent/JPH03117772U/ja active Pending
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