JPS5724866A - Zero phase voltage measuring circuit for 3-phase ac power source - Google Patents

Zero phase voltage measuring circuit for 3-phase ac power source

Info

Publication number
JPS5724866A
JPS5724866A JP10030580A JP10030580A JPS5724866A JP S5724866 A JPS5724866 A JP S5724866A JP 10030580 A JP10030580 A JP 10030580A JP 10030580 A JP10030580 A JP 10030580A JP S5724866 A JPS5724866 A JP S5724866A
Authority
JP
Japan
Prior art keywords
ovg
closed
phase voltage
relay
zero phase
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
Application number
JP10030580A
Other languages
Japanese (ja)
Inventor
Seishiro Goto
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP10030580A priority Critical patent/JPS5724866A/en
Publication of JPS5724866A publication Critical patent/JPS5724866A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0038—Details of emergency protective circuit arrangements concerning the connection of the detecting means, e.g. for reducing their number
    • H02H1/0046—Commutating the detecting means in dependance of the fault, e.g. for reducing their number

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To prevent double measurement and measure a correct zero phase voltage by connecting a residual pointer reading maximum indicator to earth type potential transformers separately provided on a main track and a spare track wires via a contact actuated in response to a grounded overvoltage relay. CONSTITUTION:For example, when a communication breaker CB-T is closed with receiving power in a single circuit, an auxiliary contact DG-A1a1 of a grounding relay DG-A1 is closed afainst an earth accident which will occur at a point EAF. An auxiliary contact OVG-Aa1 of a ground-faut overvoltage relay OVG-A is also closed to excite an auxiliary relay OVG-AX1 and an auxiliary contact OVG-AX1a1 is closed to connect a residual pointer reading maximum indicator to the tertiary side 1A of an earth potential transformer GPT-A whereby a zero phase voltage is detected. On the other hand, an auxiliary ground OVG-Ba1 of a grounded overvoltage relay OVG is closed in an earth type potential transformer GPT-B while grounding relays DG-B... fail to operate. Thus, a residual pointer reading maximum indicator MVO-B will not work. This can prevent double measurement of the zero phase voltage.
JP10030580A 1980-07-22 1980-07-22 Zero phase voltage measuring circuit for 3-phase ac power source Pending JPS5724866A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10030580A JPS5724866A (en) 1980-07-22 1980-07-22 Zero phase voltage measuring circuit for 3-phase ac power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10030580A JPS5724866A (en) 1980-07-22 1980-07-22 Zero phase voltage measuring circuit for 3-phase ac power source

Publications (1)

Publication Number Publication Date
JPS5724866A true JPS5724866A (en) 1982-02-09

Family

ID=14270448

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10030580A Pending JPS5724866A (en) 1980-07-22 1980-07-22 Zero phase voltage measuring circuit for 3-phase ac power source

Country Status (1)

Country Link
JP (1) JPS5724866A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074373U (en) * 1993-06-21 1995-01-24 豪 野中 Tray for sealed packaging
CN110501580A (en) * 2019-09-25 2019-11-26 潍柴动力股份有限公司 A kind of Phase Faults method and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH074373U (en) * 1993-06-21 1995-01-24 豪 野中 Tray for sealed packaging
CN110501580A (en) * 2019-09-25 2019-11-26 潍柴动力股份有限公司 A kind of Phase Faults method and apparatus

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