GB261826A - Improvements in or relating to electric protective systems - Google Patents

Improvements in or relating to electric protective systems

Info

Publication number
GB261826A
GB261826A GB2076825A GB2076825A GB261826A GB 261826 A GB261826 A GB 261826A GB 2076825 A GB2076825 A GB 2076825A GB 2076825 A GB2076825 A GB 2076825A GB 261826 A GB261826 A GB 261826A
Authority
GB
United Kingdom
Prior art keywords
relating
protective systems
electric protective
high frequency
tuned
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
GB2076825A
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.)
Electrical Improvements Ltd
Original Assignee
Electrical Improvements 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 Electrical Improvements Ltd filed Critical Electrical Improvements Ltd
Priority to GB2076825A priority Critical patent/GB261826A/en
Publication of GB261826A publication Critical patent/GB261826A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

261,826. Electrical Improvements, Ltd., and Grant, L. C. Aug. 19, 1925. Frequency, changing. - A transmitter for supplying a power line A with high frequency currents for protective purposes comprises a transformer C<1>, Fig. 3, having a saturated core co-operating with a tuned circuit C<2> and so arranged that harmonies are generated and cultivated. Two tuned circuits C' are provided in series with the out.- put from the generator and serve to pass the high frequency energy to the coupling devices A<1>.
GB2076825A 1925-08-19 1925-08-19 Improvements in or relating to electric protective systems Expired GB261826A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2076825A GB261826A (en) 1925-08-19 1925-08-19 Improvements in or relating to electric protective systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2076825A GB261826A (en) 1925-08-19 1925-08-19 Improvements in or relating to electric protective systems

Publications (1)

Publication Number Publication Date
GB261826A true GB261826A (en) 1926-11-19

Family

ID=10151329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2076825A Expired GB261826A (en) 1925-08-19 1925-08-19 Improvements in or relating to electric protective systems

Country Status (1)

Country Link
GB (1) GB261826A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265315A (en) * 1992-03-23 1993-09-29 Mary Elizabeth Anne Rowell Padded sheath for feeding bottle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2265315A (en) * 1992-03-23 1993-09-29 Mary Elizabeth Anne Rowell Padded sheath for feeding bottle

Similar Documents

Publication Publication Date Title
GB261826A (en) Improvements in or relating to electric protective systems
GB331240A (en) Arrangement for supplying current to radiophonic receivers
GB532502A (en) Improvements in means for subjecting matter to a high frequency electromagnetic field
GB198318A (en) Improvements in connecting device for radio receiving systems
US1866337A (en) System for producing high frequency oscillations
GB279841A (en) Means for suppressing the earth connection current in high tension electric mains
GB290298A (en) Improvements relating to the synchronization of electrical devices
GB232529A (en) Improvements in connection with electric power supply
GB1090123A (en) A power circuit breaker testing apparatus
GB1019283A (en) Improvements in or relating to generators
GB299731A (en) Improvements relating to variable inductances
GB323492A (en) An apparatus to prevent the radiation of oscillations from dynamos, motors, and the like machines
GB368898A (en) Improvements in the arrangement of condensers in electric power circuits
GB192171A (en) Improvements in arc generators of electric oscillations
GB264251A (en) Improvements in or relating to electrical transformers and like devices for transferring energy from one circuit to another
GB276637A (en) Improvements in or relating to the generation of ozone
GB224772A (en) Improvements relating to systems of electrical distribution
GB304148A (en) Improvements in high frequency apparatus
Warren Northolt radio station
GB267916A (en) Improvements in or relating to the elimination of disturbing waves or oscillations in alternating current electrical circuits
GB560943A (en) Improvements in electrical signalling systems
GB393273A (en) Power current sending plant for transmitting and distributing electric energy through open or built over space
GB213618A (en) Improvements in the electrical transmission of signs
GB194007A (en) An improved method for increasing the frequency of electric currents
GB237016A (en) Improvements in protective arrangements for electrical systems