GB1517551A – Electric power distribution control system
– Google Patents
GB1517551A – Electric power distribution control system
– Google Patents
Electric power distribution control system
Info
Publication number
GB1517551A
GB1517551A
GB27839/75A
GB2783975A
GB1517551A
GB 1517551 A
GB1517551 A
GB 1517551A
GB 27839/75 A
GB27839/75 A
GB 27839/75A
GB 2783975 A
GB2783975 A
GB 2783975A
GB 1517551 A
GB1517551 A
GB 1517551A
Authority
GB
United Kingdom
Prior art keywords
current
fault
line
resistance
waveform
Prior art date
1974-07-15
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
GB27839/75A
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.)
Raytheon Co
Original Assignee
Hughes Aircraft Co
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.)
1974-07-15
Filing date
1975-07-02
Publication date
1978-07-12
1975-07-02
Application filed by Hughes Aircraft Co
filed
Critical
Hughes Aircraft Co
1978-07-12
Publication of GB1517551A
publication
Critical
patent/GB1517551A/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
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
H02H3/08—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 excess current
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
H02H3/02—Details
H02H3/025—Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection
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
H02H3/36—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 of different systems, e.g. of parallel feeder systems
Abstract
1517551 Recognizing fault currents HUGHES AIRCRAFT CO 2 July 1975 [15 July 1974] 27839/75 Heading H2K To ensure that faults on a line 32 are recognized within a fraction of a cycle, when the line current rises above a threshold level a reference fault current waveform is generated and compared with the actual current waveform for a predetermined period. If the latter exceeds the reference waveform, a fault is assumed to exist and a control signal 35a generated to initiate protective action. The reference waveform generator comprises a source Gs normally phase-locked to the line voltage and feeding an inductance and resistance L, R representing the normal impedance of the line and load. When a detector 38 signals (39) that the line current has exceeded a threshold for more than 50 Ás, however, a switch S is closed to place a fault-simulating resistance Rs across the resistance R. The resultant reference waveform, simulating a certain level of fault, is compared (D) with the actual current waveform. If the difference, integrated (35) over a short period, is positive the control signal 35a is produced. The circuit breaking arrangement comprises contacts 10 which are separated as soon as the current exceeds its threshold. If the condition is subsequently recognized as a fault, the current is transferred to a crossed-field switch 18, which is then turned off to transfer the current to a non-linear limiting resistance 22. The limited current is finally interrupted by a circuit breaker 26.
GB27839/75A
1974-07-15
1975-07-02
Electric power distribution control system
Expired
GB1517551A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US05/488,634
US3982158A
(en)
1974-07-15
1974-07-15
Power distribution control system
Publications (1)
Publication Number
Publication Date
GB1517551A
true
GB1517551A
(en)
1978-07-12
Family
ID=23940486
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB27839/75A
Expired
GB1517551A
(en)
1974-07-15
1975-07-02
Electric power distribution control system
Country Status (4)
Country
Link
US
(1)
US3982158A
(en)
JP
(1)
JPS5132937A
(en)
DE
(1)
DE2530717A1
(en)
GB
(1)
GB1517551A
(en)
Families Citing this family (18)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4263635A
(en)
*
1977-07-20
1981-04-21
Steven Welk
Method and apparatus for sensing the clearance of fault current on an ac transmission line
US4544981A
(en)
*
1984-10-01
1985-10-01
Harris Corporation
Short circuit protector/controller circuit
US4728898A
(en)
*
1986-03-17
1988-03-01
Staley Electric Co., Inc.
Method and apparatus for detecting and locating faults in an AC transmission line using two indicators
US5191501A
(en)
*
1990-05-04
1993-03-02
Translite, Ltd.
Fast lamp current limiting apparatus and method
FR2669124B1
(en)
*
1990-11-08
1993-01-22
Commissariat Energie Atomique
BISTABLE ELECTROOPTIC DEVICE, SCREEN COMPRISING SUCH A DEVICE AND METHOD FOR IMPLEMENTING THE SCREEN.
US6075684A
(en)
*
1998-03-23
2000-06-13
Electric Boat Corporation
Method and arrangement for direct current circuit interruption
US6856045B1
(en)
2002-01-29
2005-02-15
Hamilton Sundstrand Corporation
Power distribution assembly with redundant architecture
US7023196B2
(en)
*
2003-12-12
2006-04-04
Leach International Corporation
High level arc fault detector
US8426736B2
(en)
*
2009-07-17
2013-04-23
The Invention Science Fund I Llc
Maintaining insulators in power transmission systems
US8174270B2
(en)
*
2009-07-17
2012-05-08
The Invention Science Fund I, Llc
Systems and methods for assessing standoff capabilities of in-service power line insulators
US20110011621A1
(en)
*
2009-07-17
2011-01-20
Searete Llc, A Limited Liability Corporation Of The State Of Delaware
Smart link coupled to power line
US8456168B2
(en)
*
2009-07-17
2013-06-04
The Invention Science Fund I Llc
Systems and methods for testing the standoff capability of an overhead power transmission line
US8692537B2
(en)
*
2009-07-17
2014-04-08
The Invention Science Fund I, Llc
Use pairs of transformers to increase transmission line voltage
DE102011004288A1
(en)
*
2011-02-17
2012-08-23
Robert Bosch Gmbh
Arrangement and method for disconnection detection on a circuit part with capacitive behavior
KR101667832B1
(en)
*
2012-04-23
2016-10-20
엘에스산전 주식회사
Apparatus and method for correcting of acquired data
US9954351B2
(en)
*
2015-10-26
2018-04-24
Leach International Corporation
System for implementation of I2t trip characteristic
JP7036520B2
(en)
*
2018-05-18
2022-03-15
シーメンス アクチエンゲゼルシヤフト
Monitoring of high voltage direct current transmission
EP3611522B1
(en)
*
2018-08-14
2021-05-05
NXP USA, Inc.
Embedded test circuitry and method therefor
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE1513689A1
(en)
*
1965-08-09
1969-10-23
Starkstrom Anlagenbau Erfurt V
Circuit arrangement for electronic protective devices for the detection of overcurrent or overvoltage or undervoltage
JPS4323779Y1
(en)
*
1967-11-21
1968-10-07
DE1802543A1
(en)
*
1968-10-11
1970-05-27
Continental Elektro Ind Ag
Device for monitoring overcurrents and overvoltages
US3764851A
(en)
*
1972-10-13
1973-10-09
Westinghouse Electric Corp
Current limiting device
1974
1974-07-15
US
US05/488,634
patent/US3982158A/en
not_active
Expired – Lifetime
1975
1975-07-02
GB
GB27839/75A
patent/GB1517551A/en
not_active
Expired
1975-07-10
DE
DE19752530717
patent/DE2530717A1/en
active
Granted
1975-07-15
JP
JP50085904A
patent/JPS5132937A/ja
active
Pending
Also Published As
Publication number
Publication date
USB488634I5
(en)
1976-01-20
DE2530717A1
(en)
1976-01-29
JPS5132937A
(en)
1976-03-19
US3982158A
(en)
1976-09-21
DE2530717C2
(en)
1987-06-11
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Legal Events
Date
Code
Title
Description
1978-11-15
PS
Patent sealed [section 19, patents act 1949]
1994-03-02
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19930702
