GB1172536A – Improvements in Electrical Protective Relays
– Google Patents
GB1172536A – Improvements in Electrical Protective Relays
– Google Patents
Improvements in Electrical Protective Relays
Info
Publication number
GB1172536A
GB1172536A
GB38791/66A
GB3879166A
GB1172536A
GB 1172536 A
GB1172536 A
GB 1172536A
GB 38791/66 A
GB38791/66 A
GB 38791/66A
GB 3879166 A
GB3879166 A
GB 3879166A
GB 1172536 A
GB1172536 A
GB 1172536A
Authority
GB
United Kingdom
Prior art keywords
transistor
output
comparator
signal
signals
Prior art date
1966-08-31
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
GB38791/66A
Inventor
Eric Paddison
John Mcgill Gillies
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.)
English Electric Co Ltd
Original Assignee
English Electric 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.)
1966-08-31
Filing date
1966-08-31
Publication date
1969-12-03
1966-08-31
Application filed by English Electric Co Ltd
filed
Critical
English Electric Co Ltd
1966-08-31
Priority to GB38791/66A
priority
Critical
patent/GB1172536A/en
1967-08-25
Priority to FR119039A
priority
patent/FR1535185A/en
1967-08-30
Priority to US664389A
priority
patent/US3519884A/en
1969-12-03
Publication of GB1172536A
publication
Critical
patent/GB1172536A/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
H02H3/38—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 both voltage and current; responsive to phase angle between voltage and current
H02H3/382—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 both voltage and current; responsive to phase angle between voltage and current involving phase comparison between current and voltage or between values derived from current and voltage
Abstract
1,172,536. Protective arrangements. ENGLISH ELECTRIC CO. Ltd. 30 Aug., 1967 [31 Aug., 1966], No. 38791/66. Heading H2K. [Also in Division H3] A distance protective arrangement comprises input means 13, 14 providing two A.C. signals dependent on vectorial quantities (e.g. V-IX and IR) of the protected system, and a comparator 18A for comparing the signals and producing an output when the signals have a predetermined phase sequence, have the same sense and are coincident in time. The output from the comparator is integrated in an integrator 19A which provides an output when the output from the comparator has a predetermined duration, so avoiding incorrect operation due to spurious short duration signals. The quantities are chosen so that they are in phase when a fault occurs at the boundary of a protected zone, and are determined by a replica reactance X and a replica resistance R in the means 13 and 14. A signal inverter 17 with a further comparator 18B and integrator 19B provide an output on the half cycles to which the comparator 18A does not respond. Since the outputs from the integrators operate switches 20A, 20B connected in series, incorrect operation due to D.C. offset is prevented. The comparator, Fig. 4, includes a thyristor TH1 which conducts when a signal from a square wave amplifier 16 causes a transistor TR1 to conduct. When a signal is received from a square wave amplifier 15, a transistor TR3 conducts and through a transistor TR5 renders a transistor TR6 conductive to provide an output signal to the integrator 19. At the same time a transistor TR4 renders a transistor TR 2 conductive to clamp the thyristor gate at a negative potential. When the signal from 16 ceases the transistor TR1 and thyristor TH1 cease to conduct terminating the output signal. If the phase sequence of the signals from 15 and 16 is not correct, then transistor TR2 conducts before the transistor TR1 can conduct so that no output is obtained from the comparator.
GB38791/66A
1966-08-31
1966-08-31
Improvements in Electrical Protective Relays
Expired
GB1172536A
(en)
Priority Applications (3)
Application Number
Priority Date
Filing Date
Title
GB38791/66A
GB1172536A
(en)
1966-08-31
1966-08-31
Improvements in Electrical Protective Relays
FR119039A
FR1535185A
(en)
1966-08-31
1967-08-25
Electric protection relay
US664389A
US3519884A
(en)
1966-08-31
1967-08-30
Electrical protective relays
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB38791/66A
GB1172536A
(en)
1966-08-31
1966-08-31
Improvements in Electrical Protective Relays
Publications (1)
Publication Number
Publication Date
GB1172536A
true
GB1172536A
(en)
1969-12-03
Family
ID=10405719
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB38791/66A
Expired
GB1172536A
(en)
1966-08-31
1966-08-31
Improvements in Electrical Protective Relays
Country Status (2)
Country
Link
US
(1)
US3519884A
(en)
GB
(1)
GB1172536A
(en)
Families Citing this family (9)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3763399A
(en)
*
1972-08-17
1973-10-02
Ferranti Ltd
High voltage series resonant testing circuit arrangements
GB1422346A
(en)
*
1972-11-28
1976-01-28
CH567343A5
(en)
*
1973-12-20
1975-09-30
Secheron Atel
US3946280A
(en)
*
1975-03-10
1976-03-23
Branson Ultrasonics Corporation
Overload protection circuit
IN143431B
(en)
*
1975-05-14
1977-11-26
Westinghouse Electric Corp
US4255774A
(en)
*
1979-03-16
1981-03-10
General Electric Company
Static instantaneous overcurrent relay with low transient overreach
JPS57146168A
(en)
*
1981-03-05
1982-09-09
Toshiba Corp
Device for judging power flow
FR2629918B1
(en)
*
1988-04-11
1990-08-17
Schlumberger Ind Sa
INDICATOR OF THE PHASE DIFFERENCE OF SINUSOIDAL COMPONENTS OF TWO SIGNALS POSSIBLY DEFORMED BY NON-LINEAR FILTERING
GB8817599D0
(en)
*
1988-07-23
1988-09-01
Lucas Ind Plc
A c generator fault detector
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1096413A
(en)
*
1964-04-28
1967-12-29
English Electric Co Ltd
Electrical protective relays
FR1436596A
(en)
*
1965-01-22
1966-04-29
Compteurs Comp D
Distance protection device using ultra-fast solid-state relays
US3374399A
(en)
*
1966-02-01
1968-03-19
Gen Electric
Distance protective relaying
1966
1966-08-31
GB
GB38791/66A
patent/GB1172536A/en
not_active
Expired
1967
1967-08-30
US
US664389A
patent/US3519884A/en
not_active
Expired – Lifetime
Also Published As
Publication number
Publication date
US3519884A
(en)
1970-07-07
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Legal Events
Date
Code
Title
Description
1970-04-15
PS
Patent sealed [section 19, patents act 1949]
1972-03-22
PLNP
Patent lapsed through nonpayment of renewal fees
