JPS5696374A - Operating device of electric quantity - Google Patents

Operating device of electric quantity

Info

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
Application number
JP17292479A
Other languages
Japanese (ja)
Other versions
JPS5926971B2 (en
Inventor
Takaaki Kai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Electric Manufacturing Co Ltd
Priority to JP17292479A priority Critical patent/JPS5926971B2/en
Publication of JPS5696374A publication Critical patent/JPS5696374A/en
Publication of JPS5926971B2 publication Critical patent/JPS5926971B2/en
Expired legal-status Critical Current

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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.
JP17292479A 1979-12-28 1979-12-28 Electricity calculation device Expired JPS5926971B2 (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6264280U (en) * 1985-10-09 1987-04-21

Also Published As

Publication number Publication date
JPS5926971B2 (en) 1984-07-02

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