GB1100633A - Minimum voltage three-phase relay - Google Patents

Minimum voltage three-phase relay

Info

Publication number
GB1100633A
GB1100633A GB1896565A GB1896565A GB1100633A GB 1100633 A GB1100633 A GB 1100633A GB 1896565 A GB1896565 A GB 1896565A GB 1896565 A GB1896565 A GB 1896565A GB 1100633 A GB1100633 A GB 1100633A
Authority
GB
United Kingdom
Prior art keywords
voltage
relay
reference voltage
terminals
detector
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
GB1896565A
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.)
Compteurs Schlumberger SA
Original Assignee
Compteurs Schlumberger SA
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 Compteurs Schlumberger SA filed Critical Compteurs Schlumberger SA
Publication of GB1100633A publication Critical patent/GB1100633A/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
    • H02H3/343—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
    • 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
    • H02H3/24—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 undervoltage or no-voltage
    • H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Paper (AREA)

Abstract

1,100,633. Protective arrangements. COMPAGNIE DES COMPTEURS. 5 May, 1965 [5 May, 1964], No. 18965/65. Heading H2K. A minimum voltage relay responsive to symmetrical or assymmetrical faults on a threephase supply system comprises conventional filter circuits 10, 11 respectively, providing negative and positive sequence voltages whose difference is fed to a detector 12 also supplied via circuits 13, 14 with a stabilized reference voltage adjustable to determine the operating point of the relay. When the input at terminals 12a, 12a<SP>1</SP> falls below that at 12b, 12b<SP>1</SP> an amplifier 15 (normally quiescent) energizes a control or indicating circuit 16 and also the circuit 13, which thereupon adds a predetermined constant voltage to the reference voltage to produce a positive feed-back effect in detector 12 and so ensure continued operation of members 15, 16 until the voltage at terminals 12a, 12a<SP>1</SP> rises to exceed the sum of the reference voltage and the predetermined voltage, whereupon the predetermined voltage is removed and members 15, 16 restore to normal. A theoretical discussion is given of the functioning of the relay and the derivation of its various operating parameters, Figs. 2, 3 and 4 (not shown).
GB1896565A 1964-05-05 1965-05-05 Minimum voltage three-phase relay Expired GB1100633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR973367A FR1403698A (en) 1964-05-05 1964-05-05 Three-phase undervoltage relay

Publications (1)

Publication Number Publication Date
GB1100633A true GB1100633A (en) 1968-01-24

Family

ID=8829327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1896565A Expired GB1100633A (en) 1964-05-05 1965-05-05 Minimum voltage three-phase relay

Country Status (4)

Country Link
BE (1) BE660971A (en)
CH (1) CH413060A (en)
FR (1) FR1403698A (en)
GB (1) GB1100633A (en)

Also Published As

Publication number Publication date
DE1463039B2 (en) 1972-12-28
FR1403698A (en) 1965-06-25
DE1463039A1 (en) 1969-03-27
CH413060A (en) 1966-05-15
BE660971A (en) 1965-09-13

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