CA986188A - Apparatus for detecting neutral displacement of a polyphase system - Google Patents

Apparatus for detecting neutral displacement of a polyphase system

Info

Publication number
CA986188A
CA986188A CA195,085A CA195085A CA986188A CA 986188 A CA986188 A CA 986188A CA 195085 A CA195085 A CA 195085A CA 986188 A CA986188 A CA 986188A
Authority
CA
Canada
Prior art keywords
polyphase system
neutral displacement
detecting neutral
detecting
displacement
Prior art date
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
CA195,085A
Inventor
John A. Zulaski
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.)
S&C Electric Co
Original Assignee
S&C Electric 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.)
Filing date
Publication date
Application filed by S&C Electric Co filed Critical S&C Electric Co
Application granted granted Critical
Publication of CA986188A publication Critical patent/CA986188A/en
Expired legal-status Critical Current

Links

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
    • H02H3/26—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
    • H02H3/32—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 in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/34—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 in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
    • H02H3/353—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 in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system involving comparison of phase voltages
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
CA195,085A 1973-03-19 1974-03-15 Apparatus for detecting neutral displacement of a polyphase system Expired CA986188A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US342541A US3859564A (en) 1973-03-19 1973-03-19 Apparatus for detecting neutral displacement of a polyphase system

Publications (1)

Publication Number Publication Date
CA986188A true CA986188A (en) 1976-03-23

Family

ID=23342274

Family Applications (1)

Application Number Title Priority Date Filing Date
CA195,085A Expired CA986188A (en) 1973-03-19 1974-03-15 Apparatus for detecting neutral displacement of a polyphase system

Country Status (2)

Country Link
US (1) US3859564A (en)
CA (1) CA986188A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104687A (en) * 1976-11-24 1978-08-01 S&C Electric Company Device for detecting unbalanced conditions in a polyphase equipment bank
US4330777A (en) * 1980-11-05 1982-05-18 The United States Of America As Represented By The United States Department Of Energy Device for detecting imminent failure of high-dielectric stress capacitors
FR2595881A1 (en) * 1986-03-12 1987-09-18 Bougeret Jean Pierre Method and device for protecting and monitoring multiphase receivers
US5543698A (en) * 1994-09-27 1996-08-06 Allen-Bradley Company, Inc. Method and apparatus used with AC motor for detecting unbalance
US20090231764A1 (en) * 2008-03-14 2009-09-17 Cooper Technologies Company Capacitor Bank Monitor and Method of use Thereof
US20090310272A1 (en) * 2008-06-17 2009-12-17 Global Energy Savings, Inc. Energy savings and surge protection device
US20100259230A1 (en) * 2009-04-13 2010-10-14 Boothroyd Howard G Power factor correction device with adjustable capacitance
ES2586334T3 (en) * 2009-08-21 2016-10-13 Vestas Wind Systems A/S System and method to monitor power filters and detect a power filter failure in a wind turbine electric generator
US8575941B2 (en) * 2009-09-08 2013-11-05 Schweitzer Engineering Laboratories Inc Apparatus and method for identifying a faulted phase in a shunt capacitor bank
CN103026572B (en) 2010-07-23 2015-07-01 Abb技术有限公司 Method and arrangement for capacitor bank protection
US8643383B2 (en) * 2011-01-28 2014-02-04 Rockwell Automation Technologies, Inc. Drive failure protection
CN102938010A (en) * 2012-12-10 2013-02-20 上海市电力公司 Parallel circuit unbalance degree analysis method
US9778303B2 (en) 2015-10-13 2017-10-03 Analog Devices Global Method and system for continuous off chip capacitor detection for linear regulators
US10903833B2 (en) * 2017-12-08 2021-01-26 Valquest Systems, Inc. Continuously correcting capacitor switch controller system and method
US11567109B2 (en) 2019-10-11 2023-01-31 Schweitzer Engineering Laboratories, Inc. Capacitor bank control using wireless electrical measurement sensors away from capacitor bank
US11592498B2 (en) 2020-10-02 2023-02-28 Schweitzer Engineering Laboratories, Inc. Multi-phase fault identification in capacitor banks

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309433A (en) * 1941-04-19 1943-01-26 Gen Electric Protective system
US3143687A (en) * 1956-04-30 1964-08-04 Asea Ab Relay protection for capacitor banks
US2933652A (en) * 1956-06-08 1960-04-19 Westinghouse Electric Corp Shunt capacitor bank
US2942153A (en) * 1958-01-09 1960-06-21 Mc Graw Edison Co Means for protecting shunt capacitor bank
US3158783A (en) * 1958-09-29 1964-11-24 Mc Graw Edison Co Capacitor bank protective means having unbalance current compensation
GB1090292A (en) * 1963-06-05 1967-11-08 English Electric Co Ltd Circuit arrangement for detecting capacitance changes in capacitor banks in high voltage transmission systems
US3348097A (en) * 1965-03-01 1967-10-17 Mc Graw Edison Co Capacitor bank having unbalance detecting protective means

Also Published As

Publication number Publication date
US3859564A (en) 1975-01-07

Similar Documents

Publication Publication Date Title
CA1032087A (en) Fluid separation apparatus
CA1031320A (en) Control system for a drilling apparatus
IL46066A0 (en) System for phase aligning parallel signal processing channels
AU473302B2 (en) Separator for removing a dispersed liquid phase from a continuous liquid phase
CA1033476A (en) Synchronization apparatus for a time division switching system
CA1009909A (en) Apparatus for detecting pump failure
CA986188A (en) Apparatus for detecting neutral displacement of a polyphase system
CA978639A (en) Apparatus for detecting a ground connection on load side of neutral conductor
AU6405473A (en) Sealing system for washing machine
CA1007729A (en) Overspeed protection system for centrifuge apparatus
CA1017608A (en) Apparatus for detecting a dysmetric dyslexia vision condition
GB1481223A (en) Apparatus for limiting phase angle response range
CA986484A (en) Centrifuge apparatus
AU468702B2 (en) Proximity detecting apparatus
CA1006086A (en) Apparatus for evaporating liquids
CA981750A (en) Phase displacement measuring apparatus for measuring a characteristic of a system when the system is at standstill
CA1021861A (en) Measuring apparatus for machine tool systems
SU604512A3 (en) Two-channel pulse-to-voltage converter for program-controlled machines
CA1001762A (en) Inch-metric read-out for a measuring system
SU573168A1 (en) Thermodiffusion-type column for separating liquid mixtures
CA1028633A (en) Means for separating fluids
CA1012607A (en) Apparatus for detecting electrostatically hazardous conditions
CA1032103A (en) Phase separation apparatus
CA968155A (en) Apparatus for ladle additions
IT1012378B (en) ELECTRICAL SYSTEM FOR MANEUVERING BULKWAYS