GB1465757A - Electric protection triggering apparatus - Google Patents

Electric protection triggering apparatus

Info

Publication number
GB1465757A
GB1465757A GB3401274A GB3401274A GB1465757A GB 1465757 A GB1465757 A GB 1465757A GB 3401274 A GB3401274 A GB 3401274A GB 3401274 A GB3401274 A GB 3401274A GB 1465757 A GB1465757 A GB 1465757A
Authority
GB
United Kingdom
Prior art keywords
comparator
aug
converter
input
output signal
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.)
Expired
Application number
GB3401274A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1465757A publication Critical patent/GB1465757A/en
Expired legal-status Critical Current

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
    • H02H3/44—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 the rate of change of electrical quantities
    • H02H3/445—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 the rate of change of electrical quantities of DC quantities

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

1465757 Electric protective arrangements LICENTIA PATENT - VERWALTUNGSGmbH 1 Aug 1974 [1 Aug 1973] 34012/74 Heading H2K In a system for detecting short-circuit currents in D.C. equipment such as a railway supply a detector comprises a di/dt converter 10 connected to the supply circuit (not shown) and having a resistive load 11 connected to an input amplifier 12, a resettable integrator 13 arranged to provide an output which is the integral of its input over a predetermined time period, set by a timing element 16, and to feed a comparator 14 which provides an output signal U a if its input exceeds a predetermined reference voltage U ref . A time independent measuring element 17 is connected in parallel with the integrator 13 and comparator 14 and causes an undelayed output signal U a to be produced with the occurrence of high output signals from the converter 17.
GB3401274A 1973-08-01 1974-08-01 Electric protection triggering apparatus Expired GB1465757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732338918 DE2338918C3 (en) 1973-08-01 1973-08-01 Tripping device

Publications (1)

Publication Number Publication Date
GB1465757A true GB1465757A (en) 1977-03-02

Family

ID=5888541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3401274A Expired GB1465757A (en) 1973-08-01 1974-08-01 Electric protection triggering apparatus

Country Status (4)

Country Link
DE (1) DE2338918C3 (en)
FR (1) FR2239788B3 (en)
GB (1) GB1465757A (en)
IT (1) IT1017827B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026118A1 (en) * 2001-09-21 2003-03-27 Abb Ab A converter and a method for controlling a converter

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH566009A5 (en) * 1973-12-14 1975-08-29 Secheron Atel
DE3206266A1 (en) * 1982-02-20 1983-09-01 Bbc Brown Boveri & Cie Overcurrent protection device for a semiconductor switch
CN102185288B (en) * 2011-05-18 2014-08-20 北京四方继保自动化股份有限公司 Current increment protection method capable of reflecting mean current change rate

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1563661C3 (en) * 1966-02-03 1978-06-15 Siemens Ag, 1000 Berlin Und 8000 Muenchen Trip device for electrical switches
DE1911202B2 (en) * 1969-02-28 1977-12-29 Siemens AG, 1000 Berlin und 8000 München Electronic excess current release for circuit breaker - has automatic trip following auxiliary power supply failure using relays
DE1917287A1 (en) * 1969-04-03 1970-10-08 Licentia Gmbh Switching device for monitoring a direct current system
US3665506A (en) * 1970-02-04 1972-05-23 Bendix Corp Electrical apparatus and gaging device using same
CH534444A (en) * 1972-05-23 1973-02-28 Sprecher & Schuh Ag Electronic motor protection relay with current-dependent tripping

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003026118A1 (en) * 2001-09-21 2003-03-27 Abb Ab A converter and a method for controlling a converter
US6995994B2 (en) 2001-09-21 2006-02-07 Abb Ab Converter and a method for controlling a converter

Also Published As

Publication number Publication date
DE2338918B2 (en) 1980-02-14
FR2239788A1 (en) 1975-02-28
DE2338918A1 (en) 1975-02-13
DE2338918C3 (en) 1982-06-03
FR2239788B3 (en) 1977-06-03
IT1017827B (en) 1977-08-10

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19940731