GB1175576A – Improvements in and relating to Coupling Means for Interconnecting Alternating Current Networks
– Google Patents
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
1967-03-29
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.)
1967-03-29
Filing date
1967-03-29
Publication date
1969-12-23
1967-03-29
Application filed by Associated Electrical Industries Ltd
filed
Critical
Associated Electrical Industries Ltd
1967-03-29
Priority to GB1423167A
priority
Critical
patent/GB1175576A/en
1969-12-23
Publication of GB1175576A
publication
Critical
patent/GB1175576A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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 (1)
* 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
1967
1967-03-29
GB
GB1423167A
patent/GB1175576A/en
not_active
Expired
Cited By (3)
* 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
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Legal Events
Date
Code
Title
Description
1970-05-06
PS
Patent sealed
1979-02-07
PCNP
Patent ceased through non-payment of renewal fee
