GB1175576A - Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks - Google Patents

Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks

Info

Publication number
GB1175576A
GB1175576A GB1423167A GB1423167A GB1175576A GB 1175576 A GB1175576 A GB 1175576A GB 1423167 A GB1423167 A GB 1423167A GB 1423167 A GB1423167 A GB 1423167A GB 1175576 A GB1175576 A GB 1175576A
Authority
GB
United Kingdom
Prior art keywords
switch
series
networks
resistor
excess current
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
GB1423167A
Inventor
Kenneth Meirig Jones
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB1423167A priority Critical patent/GB1175576A/en
Publication of GB1175576A publication Critical patent/GB1175576A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/021—Current limitation using saturable reactors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H02H9/028—Current limitation by detuning a series resonant circuit

Landscapes

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

Abstract

1,175,576. Tuned interconnectors for A.C. networks. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 25 June, 1968 [29 March, 1967], No. 14231/67. Heading H2H. An interconnecting arrangement between A.C. networks 1, 2 wherein an inductancecapacitance combination X1, XC is approximately series resonant when the networks are operating normally and which is detuned automatically when an excess current tends to flow in the interconnecting link due, for example, to a fault in one of the networks is provided with means whereby transient surge currents are suppressed and the return of the arrangement to normal stability assisted. When an excess current tends to flow in the interconnecting link the impedance of a path shunting the capacitor XC is considerably reduced by the alteration in the impedance of a non-linear element NL which is connected in series with two resistors R1, R2. Initially, when an excess current appears in the link the switch S, operated by a control unit C responsive to that current, remains open so that both resistors R1, R2 are effective to counteract any surge tendency in the link. After a predetermined time the unit C is effective to close the switch S whereby resistor R2 is short-circuited so stabilizing the operation of the network. After the fault has been cleared the unit C operates to open the switch S to re-insert resistor R2 into the shunt circuit whereby the return of the network to normal operation is expedited. The unit C may comprise an overcurrent relay with a built-in delay so that the switch S is closed after, say, three cycles of the excess current flow. The switch S may be of any suitable type such as a vacuum switch, a semi-conductor element or a therminonie device and may also be current directional. The non-linear element may comprise a saturable reactor or a linear reactor in series with a spark gap device, the spark gap comprising elements similar to the switch S. In another embodiment two capacitors are provided with the switch S in a connection between the point between the capacitors and the point between the resistors. In yet another embodiment the element NL is in series with one resistor only, the second resistor being in series with the switch S which combination is in shunt with X1 and XC.
GB1423167A 1967-03-29 1967-03-29 Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks Expired GB1175576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1423167A GB1175576A (en) 1967-03-29 1967-03-29 Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1423167A GB1175576A (en) 1967-03-29 1967-03-29 Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks

Publications (1)

Publication Number Publication Date
GB1175576A true GB1175576A (en) 1969-12-23

Family

ID=10037416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1423167A Expired GB1175576A (en) 1967-03-29 1967-03-29 Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks

Country Status (1)

Country Link
GB (1) GB1175576A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403302A1 (en) * 1983-02-02 1984-08-23 Mitsubishi Denki K.K., Tokio/Tokyo AC LIMITER
CN108963965A (en) * 2018-02-01 2018-12-07 韦荣贵 A kind of short circuit of electric wiring and earth leakage protective device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3403302A1 (en) * 1983-02-02 1984-08-23 Mitsubishi Denki K.K., Tokio/Tokyo AC LIMITER
GB2135838A (en) * 1983-02-02 1984-09-05 Mitsubishi Electric Corp Alternating current limiting apparatus
DE3403302C2 (en) * 1983-02-02 1987-07-09 Mitsubishi Denki K.K., Tokio/Tokyo, Jp
CN108963965A (en) * 2018-02-01 2018-12-07 韦荣贵 A kind of short circuit of electric wiring and earth leakage protective device

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee