GB279638A - Improvements in electric protective apparatus - Google Patents

Improvements in electric protective apparatus

Info

Publication number
GB279638A
GB279638A GB2732326A GB2732326A GB279638A GB 279638 A GB279638 A GB 279638A GB 2732326 A GB2732326 A GB 2732326A GB 2732326 A GB2732326 A GB 2732326A GB 279638 A GB279638 A GB 279638A
Authority
GB
United Kingdom
Prior art keywords
circuit
transformers
secondaries
transformer
series
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
GB2732326A
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.)
HEBBERT STANLEY PETCH
SYDNEY MAURICE LEJEUNE
British Thomson Houston Co Ltd
Original Assignee
HEBBERT STANLEY PETCH
SYDNEY MAURICE LEJEUNE
British Thomson Houston 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 HEBBERT STANLEY PETCH, SYDNEY MAURICE LEJEUNE, British Thomson Houston Co Ltd filed Critical HEBBERT STANLEY PETCH
Priority to GB2732326A priority Critical patent/GB279638A/en
Publication of GB279638A publication Critical patent/GB279638A/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
    • H02H3/28—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus
    • H02H3/30—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel
    • H02H3/305—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 two spaced portions of a single system, e.g. at opposite ends of one line, at input and output of apparatus using pilot wires or other signalling channel involving current comparison

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

279,638. British Thomson-Houston Co., Ltd., Lejeune, S. M., and Petch, H. S. Nov. 1, 1926. Cut - out arrangements.-A circuit 11. which mav be a feeder, interconnector, transformer, &c. is protected by current transformers 12, 13, the secondaries of which are connected in a series circuit 14, 15. Across equipotential points E, F is connected a circuit 16 including protective relays 17, 18. In order to avoid capacity currents between the circuit 16 and the circuit 14, 15 the ends G, H of the circuit 16 are raised to a potential equal to half that across either transformer 12, 13. This is effected by means of transformers 25, 26, the primaries of which are shunted across resistances in the circuit 14, 15 and the secondaries being in series with the circuit 16. The system is also applied to a three phase circuit to afford protection against both earth and interphase faults, " biassing transformers " as described in Specifications 193,434 and 216,254, or vibrating relays as described in Specification 257,337, being used.
GB2732326A 1926-11-01 1926-11-01 Improvements in electric protective apparatus Expired GB279638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2732326A GB279638A (en) 1926-11-01 1926-11-01 Improvements in electric protective apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2732326A GB279638A (en) 1926-11-01 1926-11-01 Improvements in electric protective apparatus

Publications (1)

Publication Number Publication Date
GB279638A true GB279638A (en) 1927-11-03

Family

ID=10257708

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2732326A Expired GB279638A (en) 1926-11-01 1926-11-01 Improvements in electric protective apparatus

Country Status (1)

Country Link
GB (1) GB279638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2300450A1 (en) * 1975-02-07 1976-09-03 Westinghouse Electric Corp PHASE COMPARISON RELAY DEVICE AND IMPLEMENTATION METHOD

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2300450A1 (en) * 1975-02-07 1976-09-03 Westinghouse Electric Corp PHASE COMPARISON RELAY DEVICE AND IMPLEMENTATION METHOD

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