GB219717A - Improvements in or relating to protective arrangements for electric distribution systems - Google Patents

Improvements in or relating to protective arrangements for electric distribution systems

Info

Publication number
GB219717A
GB219717A GB562823A GB562823A GB219717A GB 219717 A GB219717 A GB 219717A GB 562823 A GB562823 A GB 562823A GB 562823 A GB562823 A GB 562823A GB 219717 A GB219717 A GB 219717A
Authority
GB
United Kingdom
Prior art keywords
earth
spark gap
tripping coil
normally
transformer
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
GB562823A
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.)
SWITCHGEAR AND COWANS Ltd
Original Assignee
SWITCHGEAR AND COWANS 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 SWITCHGEAR AND COWANS Ltd filed Critical SWITCHGEAR AND COWANS Ltd
Priority to GB562823A priority Critical patent/GB219717A/en
Publication of GB219717A publication Critical patent/GB219717A/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
    • H02H3/347—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 summation current transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Transformers (AREA)

Abstract

219,717. Switchgear & Cowans, Ltd., and Neep, G. H. Feb. 27, 1923. Protective arrangements for circuits which are normally insulated from earth comprise means whereby a faulty cable will be automatically cut out consisting of a winding in each conductor normally producing balanced forces upon a relay, or a currentless condition of the secondary of a transformer energized by the windings, and a tapping taken from each conductor to one side of a spark gap the opposite side of which is connected to earth. In the arrangement shown in Fig. 2 for a three-phase, system, the phases are connected to the load through separate windings 9, 10, 11 of a single transformer, the secondary of which is connected to the tripping coil of the circuit-breaker. Each phase is connected to a separate spark gap 20, 21, 22 or other electrostatic device the other side of which is connected to earth. Instead of using a single leakage transformer three current transformers may be used with their secondaries interconnected and the tripping coil connected across them so that normally no current flows through it. An arrangement for a direct-current, circuit is shown in Fig. 4. The positive and negative mains are reversely connected through a differential relay and are connected through a spark gap to earth. On disturbance of balance the armature 26 is attracted and the tripping coil closed. Specification 198,788 is referred to.
GB562823A 1923-02-27 1923-02-27 Improvements in or relating to protective arrangements for electric distribution systems Expired GB219717A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB562823A GB219717A (en) 1923-02-27 1923-02-27 Improvements in or relating to protective arrangements for electric distribution systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB562823A GB219717A (en) 1923-02-27 1923-02-27 Improvements in or relating to protective arrangements for electric distribution systems

Publications (1)

Publication Number Publication Date
GB219717A true GB219717A (en) 1924-07-28

Family

ID=9799643

Family Applications (1)

Application Number Title Priority Date Filing Date
GB562823A Expired GB219717A (en) 1923-02-27 1923-02-27 Improvements in or relating to protective arrangements for electric distribution systems

Country Status (1)

Country Link
GB (1) GB219717A (en)

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