JPS5696374A - Operating device of electric quantity - Google Patents
Operating device of electric quantityInfo
- Publication number
- JPS5696374A JPS5696374A JP17292479A JP17292479A JPS5696374A JP S5696374 A JPS5696374 A JP S5696374A JP 17292479 A JP17292479 A JP 17292479A JP 17292479 A JP17292479 A JP 17292479A JP S5696374 A JPS5696374 A JP S5696374A
- Authority
- JP
- Japan
- Prior art keywords
- output
- operated
- instantaneous value
- product
- electric quantity
- 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.)
- Granted
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
PURPOSE:To detect surely the zero-phase circulating current for ground-fault, by operating the instantaneous value of the synthesized vector from three electric quantities of the sine waveform in the joint use multiline ground-fault protection relay system. CONSTITUTION:The instantaneous value of the synthesized vector is operated from three electric quantities A, B and C of the same frequency and the sine waveform. In this case, effective values of electric quantities A and B are operated in 61 and 62 to obtain outputs (a) and (b), and output (a) is divided by output (b) in 63 to output ratio a/b. The cosine of the phase difference between electric quantities A and B is operated in 64 and is multiplied by output a/b in 65. The product between the instantaneous value of electric quantity C and the output obtained by operation in 65 is operated in 66. Next, the product between the output obtained by operation in 67 and output a/b is operated in 68, and the product between this output and the instantaneous value of electric quantity C phase-delayed by 90 deg. is operated in 69, and the difference between the outputs of operators 66 and 69 is obtained to output the instantaneous value of the synthesized vector.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17292479A JPS5926971B2 (en) | 1979-12-28 | 1979-12-28 | Electricity calculation device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17292479A JPS5926971B2 (en) | 1979-12-28 | 1979-12-28 | Electricity calculation device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5696374A true JPS5696374A (en) | 1981-08-04 |
JPS5926971B2 JPS5926971B2 (en) | 1984-07-02 |
Family
ID=15950870
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17292479A Expired JPS5926971B2 (en) | 1979-12-28 | 1979-12-28 | Electricity calculation device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5926971B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6264280U (en) * | 1985-10-09 | 1987-04-21 |
-
1979
- 1979-12-28 JP JP17292479A patent/JPS5926971B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5926971B2 (en) | 1984-07-02 |
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