GB1383380A – Electronic apparatus for indicating conductor overload conditions
– Google Patents
GB1383380A – Electronic apparatus for indicating conductor overload conditions
– Google Patents
Electronic apparatus for indicating conductor overload conditions
Info
Publication number
GB1383380A
GB1383380A
GB786272A
GB786272A
GB1383380A
GB 1383380 A
GB1383380 A
GB 1383380A
GB 786272 A
GB786272 A
GB 786272A
GB 786272 A
GB786272 A
GB 786272A
GB 1383380 A
GB1383380 A
GB 1383380A
Authority
GB
United Kingdom
Prior art keywords
signal
sum
produce
conductor
proportional
Prior art date
1971-03-15
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
GB786272A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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.)
1971-03-15
Filing date
1972-02-21
Publication date
1974-02-12
1972-02-21
Application filed by Westinghouse Electric Corp
filed
Critical
Westinghouse Electric Corp
1974-02-12
Publication of GB1383380A
publication
Critical
patent/GB1383380A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06G—ANALOGUE COMPUTERS
G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
G—PHYSICS
G06—COMPUTING; CALCULATING OR COUNTING
G06G—ANALOGUE COMPUTERS
G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
G06G7/18—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals
G06G7/184—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements
G06G7/186—Arrangements for performing computing operations, e.g. operational amplifiers for integration or differentiation; for forming integrals using capacitive elements using an operational amplifier comprising a capacitor or a resistor in the feedback loop
G—PHYSICS
G05—CONTROLLING; REGULATING
G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
G05B9/00—Safety arrangements
G05B9/02—Safety arrangements electric
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
H02H3/093—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 with timing means
Abstract
1383380 Protective arrangements WESTINGHOUSE ELECTRIC CORP 21 Feb 1972 [15 March 1971] 7862/72 Heading H2K An electronic overload protective arrangement comprises means 10 to produce a first signal X proportional to the magnitude of the current in a protected conductor, means 18 to sum the signal X with a reference second signal C of opposite sign to the signal X and of a magnitude proportional to the steady-state current capability of the conductor to produce a difference signal (X – C) and means 20 to integrate the difference signal with time to produce an integrated signal 1/A(X – C)T. Means 22 are provided to algebraically sum a reference third signal B of opposite sign to the first signal and of a magnitude proportional to the maximum continuous current handling capability of the conductor, the integrated signal and the first signal, and means 26 respond to the algebraic sum 1/A(X – C)T + X – B to provide a trip signal when the sum is zero or of the same sign as the first signal. Fig. 2 (not shown) illustrates a solid state circuit in which the means 14, 20 and 26 are operational amplifiers and the trip signal is applied to the control circuit of a static power switch circuit.
GB786272A
1971-03-15
1972-02-21
Electronic apparatus for indicating conductor overload conditions
Expired
GB1383380A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US12430971A
1971-03-15
1971-03-15
Publications (1)
Publication Number
Publication Date
GB1383380A
true
GB1383380A
(en)
1974-02-12
Family
ID=22414091
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB786272A
Expired
GB1383380A
(en)
1971-03-15
1972-02-21
Electronic apparatus for indicating conductor overload conditions
Country Status (8)
Country
Link
US
(1)
US3697813A
(en)
JP
(1)
JPS5316497B1
(en)
CA
(1)
CA953420A
(en)
DE
(1)
DE2211827A1
(en)
FR
(1)
FR2130210B1
(en)
GB
(1)
GB1383380A
(en)
IT
(1)
IT950151B
(en)
NL
(1)
NL7203376A
(en)
Families Citing this family (22)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3944890A
(en)
*
1974-09-10
1976-03-16
General Electric Co.
Static overcurrent relay
US3968410A
(en)
*
1974-09-10
1976-07-06
General Electric Company
Static overcurrent relays
US4012669A
(en)
*
1975-08-29
1977-03-15
Envirotech Corporation
Electronic overload detecting device
US4019096A
(en)
*
1976-06-07
1977-04-19
Rockwell International Corporation
Current limiting apparatus
CA1087695A
(en)
*
1976-06-21
1980-10-14
David A. Fox
Multi-mode control logic circuit for solid state relays
US4047235A
(en)
*
1976-08-13
1977-09-06
General Electric Company
Current limit and overcurrent cut off system
JPS5568816A
(en)
*
1978-11-17
1980-05-23
Meidensha Electric Mfg Co Ltd
Time limiting circuit
DE2929272A1
(en)
*
1979-07-19
1981-02-12
Siemens Ag
MONITORING DEVICE FOR THE VOLTAGE LOAD OF A CONDENSER
US4346424A
(en)
*
1980-02-22
1982-08-24
Eaton Corporation
Electronic remote control D.C. power controller and circuit breaker
US4393431A
(en)
*
1980-04-23
1983-07-12
Mcgraw-Edison Company
Overcurrent relay circuit
US4363064A
(en)
*
1981-07-27
1982-12-07
The United States Of America As Represented By The Secretary Of The Navy
Overcurrent protection system
JPS57175539U
(en)
*
1982-02-25
1982-11-06
FR2595806A1
(en)
*
1986-03-12
1987-09-18
Total Energie Dev
Method and device for detecting frost on a heat exchanger
DE3813413A1
(en)
*
1988-04-21
1989-11-09
Telefunken Electronic Gmbh
SQUARE SWITCHING
US4835652A
(en)
*
1988-07-06
1989-05-30
Westinghouse Electric Corp.
Bi-directional DC power controller with fault protection
US4943761A
(en)
*
1988-07-06
1990-07-24
Westinghouse Electric Corp.
Current limited DC power controller
US5073724A
(en)
*
1990-07-18
1991-12-17
Westinghouse Electric Corp.
Programmable inverse time delay circuit
US5181155A
(en)
*
1990-08-30
1993-01-19
Beg Mirza A
Overcurrent trip circuit
US5633774A
(en)
*
1994-02-25
1997-05-27
Siemens Energy & Automation Inc
Electronic overload relay power source
DE20109687U1
(en)
*
2001-06-13
2002-10-24
Weidmueller Interface
Fuse circuit for a regulated power supply unit providing a direct current
DE102005046980B4
(en)
*
2005-09-30
2008-11-20
Infineon Technologies Ag
Fuse circuit for protecting a load
FR3084216B1
(en)
*
2018-07-19
2020-09-11
Thales Sa
BILAME EMULATION DEVICE AND AN ELECTRIC LINE PROTECTION DEVICE AGAINST OVERCURRENT
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
FR1303315A
(en)
*
1961-10-10
1962-09-07
English Electric Co Ltd
Time delay electrical relay systems
US3434011A
(en)
*
1966-08-25
1969-03-18
Ite Circuit Breaker Ltd
Saturating current transformer for static relays
US3444434A
(en)
*
1967-03-06
1969-05-13
Ite Imperial Corp
Static time-overcurrent relay
US3573555A
(en)
*
1969-02-10
1971-04-06
Ite Imperial Corp
Time delay extender for static relays
1971
1971-03-15
US
US124309A
patent/US3697813A/en
not_active
Expired – Lifetime
1972
1972-02-21
CA
CA135,218A
patent/CA953420A/en
not_active
Expired
1972-02-21
GB
GB786272A
patent/GB1383380A/en
not_active
Expired
1972-03-01
JP
JP2067272A
patent/JPS5316497B1/ja
active
Pending
1972-03-11
DE
DE19722211827
patent/DE2211827A1/en
active
Pending
1972-03-14
FR
FR7208831A
patent/FR2130210B1/fr
not_active
Expired
1972-03-14
NL
NL7203376A
patent/NL7203376A/xx
unknown
1972-03-14
IT
IT21801/72A
patent/IT950151B/en
active
Also Published As
Publication number
Publication date
DE2211827A1
(en)
1972-09-28
FR2130210A1
(en)
1972-11-03
JPS4731148A
(en)
1972-11-10
CA953420A
(en)
1974-08-20
JPS5316497B1
(en)
1978-06-01
FR2130210B1
(en)
1974-12-06
US3697813A
(en)
1972-10-10
NL7203376A
(en)
1972-09-19
IT950151B
(en)
1973-06-20
Similar Documents
Publication
Publication Date
Title
GB1383380A
(en)
1974-02-12
Electronic apparatus for indicating conductor overload conditions
GB1288660A
(en)
1972-09-13
GB1409287A
(en)
1975-10-08
Ground fault indicator device
AU8271275A
(en)
1977-01-06
Panelboard and circuit breaker combination
GB1442812A
(en)
1976-07-14
Devices for monitoring electrical loads
CA1022467A
(en)
1977-12-13
Load protective circuit
GB1517266A
(en)
1978-07-12
Method of compensating for the voltage coefficient of ion-implanted or diffused resistors
ZA771559B
(en)
1978-01-25
An improvement in or relating to control for current range of monitoring circuit on load tap changer
GB1529727A
(en)
1978-10-25
Device for exerting a restoring force
GB1366196A
(en)
1974-09-11
Protective device for an alternating current power supply system
EP0350299A3
(en)
1990-12-19
Bi-directional dc power controller with fault protection
GB977913A
(en)
1964-12-16
Improvements in or relating to electrical apparatus and systems
ZA777390B
(en)
1978-10-25
An improvement in or relating to circuit breaker with current carrying conductor system utilizing eddy
GB1164615A
(en)
1969-09-17
Improvements in Electrical Measuring Systems
JPS57206105A
(en)
1982-12-17
Protecting device for output device of amplifier
GB1192595A
(en)
1970-05-20
Improved Static Electrical Converters
CA1036202A
(en)
1978-08-08
Electric circuit breaker with series connected interrupting and isolating breaks
GB1123200A
(en)
1968-08-14
Detection of faults in electrical induction furnaces
GB1390195A
(en)
1975-04-09
Electrical distance protection systems
CA1020992A
(en)
1977-11-15
Electric circuit breaker with electromagnetic and thermal trip means
STRAITS
1971
System for measurement of response time of high current interruption components(Controllable high current source applied to circuit protective and control devices to determine surge and/or maximum interrupt capability and response time)
JPS56160611A
(en)
1981-12-10
Analog quantity indicator
ZA805832B
(en)
1981-09-30
Rectifier arrangement
JPS55114960A
(en)
1980-09-04
Electricity detection unit
SU1098060A2
(en)
1984-06-15
Device for correcting error of single-step current transformer
Legal Events
Date
Code
Title
Description
1975-06-25
PS
Patent sealed [section 19, patents act 1949]
1978-09-27
PCNP
Patent ceased through non-payment of renewal fee
