FI88449C - Effektivvaerdesmaetande anordning foer minusfoeljdsstroem - Google Patents

Effektivvaerdesmaetande anordning foer minusfoeljdsstroem

Info

Publication number
FI88449C
FI88449C FI850501A FI850501A FI88449C FI 88449 C FI88449 C FI 88449C FI 850501 A FI850501 A FI 850501A FI 850501 A FI850501 A FI 850501A FI 88449 C FI88449 C FI 88449C
Authority
FI
Finland
Prior art keywords
funds
animal
effective development
development
effective
Prior art date
Application number
FI850501A
Other languages
English (en)
Swedish (sv)
Other versions
FI850501A0 (fi
FI850501L (fi
FI88449B (fi
Inventor
Curt Jacobsson
Original Assignee
Asea Ab
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 Asea Ab filed Critical Asea Ab
Publication of FI850501A0 publication Critical patent/FI850501A0/fi
Publication of FI850501L publication Critical patent/FI850501L/fi
Publication of FI88449B publication Critical patent/FI88449B/fi
Application granted granted Critical
Publication of FI88449C publication Critical patent/FI88449C/fi

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/343—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using phase sequence analysers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/16—Measuring asymmetry of polyphase networks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
FI850501A 1984-02-07 1985-02-06 Effektivvaerdesmaetande anordning foer minusfoeljdsstroem FI88449C (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8400621A SE452822B (sv) 1984-02-07 1984-02-07 Forfarande for bestemning av atminstone en av plusfoljdstrommarna och/eller en av minusfoljdsstrommarna samt anordning for genomforande av det nemnda forfarandet

Publications (4)

Publication Number Publication Date
FI850501A0 FI850501A0 (fi) 1985-02-06
FI850501L FI850501L (fi) 1985-08-08
FI88449B FI88449B (fi) 1993-01-29
FI88449C true FI88449C (fi) 1993-05-10

Family

ID=20354629

Family Applications (1)

Application Number Title Priority Date Filing Date
FI850501A FI88449C (fi) 1984-02-07 1985-02-06 Effektivvaerdesmaetande anordning foer minusfoeljdsstroem

Country Status (6)

Country Link
US (1) US4641088A (fi)
EP (1) EP0153614B1 (fi)
CA (1) CA1237474A (fi)
DE (1) DE3574626D1 (fi)
FI (1) FI88449C (fi)
SE (1) SE452822B (fi)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4710703A (en) * 1986-01-15 1987-12-01 Westinghouse Electric Corp. Direction sensing system for an AC power supply and AC motor drive with such direction sensing system
US4728806A (en) * 1986-12-05 1988-03-01 Westinghouse Electric Corp. DC link variable speed constant frequency power source paralleling controls
US5216621A (en) * 1991-02-28 1993-06-01 Mehta Tech. Inc. Line disturbance monitor and recorder system
US5378979A (en) * 1992-11-25 1995-01-03 Allen-Bradley Company, Inc. Method and apparatus for efficiently computing symmetric sequence signals in a three phase power system
US5576618A (en) * 1994-10-20 1996-11-19 Abb Power T&D Company, Inc. Process and apparatus for comparing in real time phase differences between phasors
JP3229520B2 (ja) * 1995-06-16 2001-11-19 三菱電機株式会社 相回転異常検出装置
DE19744009C1 (de) * 1997-09-26 1999-08-19 Siemens Ag Verfahren zum Erzeugen eines einen auf einer dreiphasigen Energieübertragungsleitung aufgetretenen dreipoligen Kurzschluß kennzeichnenden Signals
DE102005000108A1 (de) * 2005-09-02 2007-03-15 Hilti Ag Befestigungselement für harte Untergründe
US7205756B1 (en) * 2005-10-19 2007-04-17 Hamilton Sundstrand Corporation Unbalanced current detection
DE102006054870A1 (de) 2006-11-20 2008-06-12 Repower Systems Ag Windenergieanlage mit Gegensystemregelung und Betriebsverfahren
WO2009076769A1 (en) * 2007-12-17 2009-06-25 The University Of British Columbia A method and system for protecting an electrical power transmission network
DE102010037396A1 (de) * 2010-09-08 2012-03-08 Phoenix Contact Gmbh & Co. Kg Verfahren und Vorrichtung zur Erkennung von Stromasymmetrie in Drehstromnetzen
WO2012062323A2 (en) * 2010-11-10 2012-05-18 Vestas Wind Systems A/S Method and system for operating a wind turbine
CN105785139B (zh) * 2014-12-15 2021-04-16 丹佛斯（天津）有限公司 三相检测电路、三相检测方法和压缩机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3699441A (en) * 1971-01-04 1972-10-17 John R Linders Polyphase signal monitoring system
US4210948A (en) * 1978-06-15 1980-07-01 Allen-Bradley Company Method and apparatus for monitoring line voltage in a polyphase source
US4342062A (en) * 1979-05-21 1982-07-27 General Electric Company Sequence network circuits for protective relaying applications
JPS5837636B2 (ja) * 1980-07-31 1983-08-17 富士通株式会社 半導体記憶装置

Also Published As

Publication number Publication date
US4641088A (en) 1987-02-03
EP0153614B1 (de) 1989-12-06
EP0153614A3 (en) 1986-04-16
SE8400621L (sv) 1985-08-08
FI850501A0 (fi) 1985-02-06
FI850501L (fi) 1985-08-08
CA1237474A (en) 1988-05-31
FI88449B (fi) 1993-01-29
SE452822B (sv) 1987-12-14
EP0153614A2 (de) 1985-09-04
SE8400621D0 (sv) 1984-02-07
DE3574626D1 (de) 1990-01-11

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Legal Events

Date Code Title Description
BB Publication of examined application
MM Patent lapsed

Owner name: ASEA AKTIEBOLAG