GB678140A - Improvements in or relating to electromagnetic relay protective arrangements - Google Patents

Improvements in or relating to electromagnetic relay protective arrangements

Info

Publication number
GB678140A
GB678140A GB6396/51A GB639651A GB678140A GB 678140 A GB678140 A GB 678140A GB 6396/51 A GB6396/51 A GB 6396/51A GB 639651 A GB639651 A GB 639651A GB 678140 A GB678140 A GB 678140A
Authority
GB
United Kingdom
Prior art keywords
relay
relating
electromagnetic relay
responds
march
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
GB6396/51A
Other languages
English (en)
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB678140A publication Critical patent/GB678140A/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
    • H02H3/26—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
    • H02H3/353—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 involving comparison of phase voltages
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/008—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for protective arrangements according to this subclass

Landscapes

  • Relay Circuits (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
GB6396/51A 1950-03-21 1951-03-16 Improvements in or relating to electromagnetic relay protective arrangements Expired GB678140A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL152434 1950-03-21

Publications (1)

Publication Number Publication Date
GB678140A true GB678140A (en) 1952-08-27

Family

ID=19750489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6396/51A Expired GB678140A (en) 1950-03-21 1951-03-16 Improvements in or relating to electromagnetic relay protective arrangements

Country Status (6)

Country Link
US (1) US2601473A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE501992A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH289178A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE858716C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB678140A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL81111C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2914704A (en) * 1955-10-31 1959-11-24 Gilfillan Bros Inc Abnormal voltage protection circuit
US2951188A (en) * 1956-01-10 1960-08-30 Ite Circuit Breaker Ltd High speed contacting device
US3048746A (en) * 1958-03-04 1962-08-07 English Electric Co Ltd Electrical protective relays using double rectified bridge comparators
US3001101A (en) * 1958-03-04 1961-09-19 English Electric Co Ltd Electrical protective relays
US3108205A (en) * 1958-05-02 1963-10-22 Burroughs Corp Voltage sensing control circuit
US3426274A (en) * 1964-11-19 1969-02-04 Western Reserve Electronics In Diode bridge protection circuits for electrical measuring instruments employing the diode forward drop threshold voltage

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1798687A (en) * 1925-09-03 1931-03-31 Bbc Brown Boveri & Cie Electric relay apparatus
US2462212A (en) * 1944-11-06 1949-02-22 Matthews W N Corp Protective switch
US2520792A (en) * 1948-11-17 1950-08-29 Ite Circuit Breaker Ltd Multirange overcurrent relay

Also Published As

Publication number Publication date
US2601473A (en) 1952-06-24
CH289178A (de) 1953-02-28
BE501992A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE858716C (de) 1952-12-08
NL81111C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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