SE343991B - - Google Patents

Info

Publication number
SE343991B
SE343991B SE6948/68A SE694868A SE343991B SE 343991 B SE343991 B SE 343991B SE 6948/68 A SE6948/68 A SE 6948/68A SE 694868 A SE694868 A SE 694868A SE 343991 B SE343991 B SE 343991B
Authority
SE
Sweden
Application number
SE6948/68A
Inventor
J Smith
F Gray
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.)
Filing date
Publication date
Application filed by English Electric Co Ltd filed Critical English Electric Co Ltd
Publication of SE343991B publication Critical patent/SE343991B/xx

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
    • H01H83/14—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by imbalance of two or more currents or voltages, e.g. for differential protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/06—Arrangements for supplying operative power
    • 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
    • H02H3/083—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 for three-phase systems
    • 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
SE6948/68A 1967-05-23 1968-05-22 SE343991B (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23842/67A GB1207323A (en) 1967-05-23 1967-05-23 A.c. system fault indicator

Publications (1)

Publication Number Publication Date
SE343991B true SE343991B (fr) 1972-03-20

Family

ID=10202196

Family Applications (1)

Application Number Title Priority Date Filing Date
SE6948/68A SE343991B (fr) 1967-05-23 1968-05-22

Country Status (6)

Country Link
US (1) US3558984A (fr)
CH (1) CH462955A (fr)
DE (1) DE1763409A1 (fr)
FR (1) FR1565834A (fr)
GB (1) GB1207323A (fr)
SE (1) SE343991B (fr)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN154286B (fr) * 1979-05-16 1984-10-13 Gen Electric Co Ltd
US5111189A (en) * 1989-11-27 1992-05-05 Sigma Instruments, Inc. Fault indicator with timing control
US8649142B2 (en) * 2009-09-17 2014-02-11 Schweitzer Engineering Laboratories Inc Equivalent alpha plane fault determination for a multi-terminal power apparatus
US8289668B2 (en) * 2009-09-17 2012-10-16 Schweitzer Engineering Laboratories, Inc. Charging current compensation for line current differential protection
US9229036B2 (en) 2012-01-03 2016-01-05 Sentient Energy, Inc. Energy harvest split core design elements for ease of installation, high performance, and long term reliability
US9182429B2 (en) 2012-01-04 2015-11-10 Sentient Energy, Inc. Distribution line clamp force using DC bias on coil
US9008982B2 (en) 2012-03-09 2015-04-14 Schweitzer Engineering Laboratories, Inc. Systems and methods for determining residual flux in a power transformer
US9954354B2 (en) 2015-01-06 2018-04-24 Sentient Energy, Inc. Methods and apparatus for mitigation of damage of power line assets from traveling electrical arcs
US9984818B2 (en) 2015-12-04 2018-05-29 Sentient Energy, Inc. Current harvesting transformer with protection from high currents
US10634733B2 (en) 2016-11-18 2020-04-28 Sentient Energy, Inc. Overhead power line sensor
WO2019060841A1 (fr) 2017-09-22 2019-03-28 Schweitzer Engineering Laboratories, Inc. Mesure de tension haute fidélité utilisant un diviseur résistif dans un transformateur de tension à couplage capacitif
US11038342B2 (en) 2017-09-22 2021-06-15 Schweitzer Engineering Laboratories, Inc. Traveling wave identification using distortions for electric power system protection
US10802054B2 (en) 2017-09-22 2020-10-13 Schweitzer Engineering Laboratories, Inc. High-fidelity voltage measurement using a capacitance-coupled voltage transformer
US11476674B2 (en) 2018-09-18 2022-10-18 Sentient Technology Holdings, LLC Systems and methods to maximize power from multiple power line energy harvesting devices
US11041915B2 (en) 2018-09-18 2021-06-22 Sentient Technology Holdings, LLC Disturbance detecting current sensor
US12050241B2 (en) 2018-10-15 2024-07-30 Sentient Technology Holdings, Llc. Power line sensors with automatic phase identification
US11125832B2 (en) 2018-12-13 2021-09-21 Sentient Technology Holdings, LLC Multi-phase simulation environment
WO2020163367A1 (fr) 2019-02-04 2020-08-13 Sentient Energy, Inc. Bloc d'alimentation pour équipement souterrain d'utilité électrique
US11187727B2 (en) 2019-04-29 2021-11-30 Schweitzer Engineering Laboratories, Inc. Capacitance-coupled voltage transformer monitoring
US11476655B2 (en) 2020-01-14 2022-10-18 Schweitzer Engineering Laboratories, Inc. Trapped charge estimation
US11575253B2 (en) 2020-05-12 2023-02-07 Schweitzer Engineering Laboratories, Inc. Controlled three-pole close for transmission lines
CN111796206B (zh) * 2020-07-08 2023-03-28 广东电网有限责任公司 一种潜望镜式漏电观测装置
US11233389B1 (en) 2020-10-30 2022-01-25 Schweitzer Engineering Laboratories, Inc. Controlled three-pole close for transformers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3187282A (en) * 1962-09-24 1965-06-01 Sigma Instruments Inc Current probe for high tension lines
US3418575A (en) * 1963-02-28 1968-12-24 Westinghouse Electric Corp High voltage current measuring device employing means responsive to the electromagnetic field generated by the current
US3319125A (en) * 1964-09-09 1967-05-09 Mc Graw Edison Co Repeating circuit interrupters having sequence coordination

Also Published As

Publication number Publication date
DE1763409A1 (de) 1971-12-30
CH462955A (fr) 1968-09-30
US3558984A (en) 1971-01-26
FR1565834A (fr) 1969-05-02
GB1207323A (en) 1970-09-30

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