GB747655A - Improvements in electrical protective equipments - Google Patents

Improvements in electrical protective equipments

Info

Publication number
GB747655A
GB747655A GB2018552A GB2018552A GB747655A GB 747655 A GB747655 A GB 747655A GB 2018552 A GB2018552 A GB 2018552A GB 2018552 A GB2018552 A GB 2018552A GB 747655 A GB747655 A GB 747655A
Authority
GB
United Kingdom
Prior art keywords
winding
phase currents
star
energized
aug
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
GB2018552A
Inventor
Clifford Ryder
John Rushton
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical 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 Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2018552A priority Critical patent/GB747655A/en
Publication of GB747655A publication Critical patent/GB747655A/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

Landscapes

  • Protection Of Transformers (AREA)

Abstract

747,655. Protective cut-out arrangements. METROPOLITAN - VICKERS ELECTRICAL CO., Ltd. Aug: 11, 1953 [Aug. 11, 1952], No. 20185/52. Class 38(5) In a protective equipment providing earth fault protection for a delta connected circuit 1, a polarized moving coil relay 19 has a restraining winding 18 energized in dependence on the arithmetic sum of the phase currents and an operating winding 20 energized in accordance with the vector sum of the phase currents. In. the Figure star-connected main current transformers 6 ...... 8 supply star-connected auxiliary transformers 9 ...... 11 having secondary windings connected to full-wave rectifiers 15 ...... 17. The output terminals of the rectifiers are connected in parallel 'to the winding 18 so that the output currents of the auxiliary transformers are separately rectified before summation and the current in the winding 18 is proportional to the arithmetic sum. A transformer 12 connected between the star points 13, 14 energizes the winding 20 through a full-wave rectifier 21 in accordance with the residual current, i.e. the vector sum of the phase currents.
GB2018552A 1952-08-11 1952-08-11 Improvements in electrical protective equipments Expired GB747655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2018552A GB747655A (en) 1952-08-11 1952-08-11 Improvements in electrical protective equipments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2018552A GB747655A (en) 1952-08-11 1952-08-11 Improvements in electrical protective equipments

Publications (1)

Publication Number Publication Date
GB747655A true GB747655A (en) 1956-04-11

Family

ID=10141812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2018552A Expired GB747655A (en) 1952-08-11 1952-08-11 Improvements in electrical protective equipments

Country Status (1)

Country Link
GB (1) GB747655A (en)

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