GB1340714A - Loss of voltage detector for a polyphase power system - Google Patents

Loss of voltage detector for a polyphase power system

Info

Publication number
GB1340714A
GB1340714A GB2471671*A GB2471671A GB1340714A GB 1340714 A GB1340714 A GB 1340714A GB 2471671 A GB2471671 A GB 2471671A GB 1340714 A GB1340714 A GB 1340714A
Authority
GB
United Kingdom
Prior art keywords
transistor
voltage
april
capacitor
base
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
GB2471671*A
Other languages
English (en)
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.)
Bull HN Information Systems Italia SpA
Bull HN Information Systems Inc
Original Assignee
Honeywell Information Systems Italia SpA
Honeywell Information Systems Inc
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 Honeywell Information Systems Italia SpA, Honeywell Information Systems Inc filed Critical Honeywell Information Systems Italia SpA
Publication of GB1340714A publication Critical patent/GB1340714A/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
    • H02H3/24—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 undervoltage or no-voltage
    • H02H3/253—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 undervoltage or no-voltage for multiphase applications, e.g. phase interruption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • 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
    • H02H3/325—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 involving voltage comparison

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Power Conversion In General (AREA)
GB2471671*A 1970-04-09 1971-04-19 Loss of voltage detector for a polyphase power system Expired GB1340714A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2686470A 1970-04-09 1970-04-09
JP1884871A JPS464222A (enExample) 1970-04-09 1971-03-31

Publications (1)

Publication Number Publication Date
GB1340714A true GB1340714A (en) 1973-12-12

Family

ID=53052580

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2471671*A Expired GB1340714A (en) 1970-04-09 1971-04-19 Loss of voltage detector for a polyphase power system

Country Status (6)

Country Link
US (1) US3636541A (enExample)
JP (1) JPS464222A (enExample)
CA (1) CA929226A (enExample)
DE (1) DE2117388A1 (enExample)
FR (1) FR2085956B3 (enExample)
GB (1) GB1340714A (enExample)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4938933U (enExample) * 1972-07-07 1974-04-05
US3919703A (en) * 1974-04-08 1975-11-11 Bertea Corp Fault detection system for transducers
US4008417A (en) * 1974-07-29 1977-02-15 General Equipment And Manufacturing Company, Inc. Phase loss detector
US4021703A (en) * 1975-06-02 1977-05-03 Westinghouse Electric Corporation Phase imbalance detection circuit
SE419810B (sv) * 1975-06-23 1981-08-24 Charbonnages Ste Chimique Anordning for avkenning av vexelstrom
JPS5219238A (en) * 1975-08-06 1977-02-14 Matsushita Electric Ind Co Ltd Phase deficit detection apparatus
US4024438A (en) * 1975-10-30 1977-05-17 Coilcraft, Inc. Delta phase loss detector
JPS5450297A (en) * 1977-09-28 1979-04-20 Maruko Denki Kouji Kk Electric wire burglar alarm safety device
JPS5543393U (enExample) * 1978-09-15 1980-03-21
US4346307A (en) * 1978-11-03 1982-08-24 S & C Electric Company Voltage-unbalance detector for polyphase electrical systems
US4354214A (en) * 1979-09-11 1982-10-12 Walton John F Motor protection circuit
FR2468238A1 (fr) * 1979-10-16 1981-04-30 Telemecanique Electrique Dispositif electronique de protection d'un moteur electrique contre les surcharges et la perte d'une phase de la tension alternative triphasee d'alimentation
US4379317A (en) * 1981-04-27 1983-04-05 Westinghouse Electric Corp. Solid-state load protection system having loss of phase sensing
US4393430A (en) * 1981-06-08 1983-07-12 Hughes Jack H Multi-phase failure detector
JPS58139626A (ja) * 1982-02-10 1983-08-19 三菱電機株式会社 欠相検出回路
NL8300449A (nl) * 1983-02-07 1984-09-03 Philips Nv Optische indikatie-inrichting.
US4507713A (en) * 1983-10-11 1985-03-26 Allied Corporation Wide frequency multi-phase undervoltage detection circuit
US5557180A (en) * 1993-06-30 1996-09-17 Sgs-Thomson Microelectronics, Inc. Circuit and method for operating a 3-phase motor with a uni-coil phase commutation scheme
US5665256A (en) * 1995-12-19 1997-09-09 The Esab Group, Inc. Cutting or welding system having phase loss detector and method of detecting phase loss for same
CN102411824A (zh) * 2011-12-23 2012-04-11 浙江师范大学 智能端子报警器电路

Also Published As

Publication number Publication date
FR2085956B3 (enExample) 1974-02-15
FR2085956A3 (enExample) 1971-12-31
US3636541A (en) 1972-01-18
JPS464222A (enExample) 1971-11-11
DE2117388A1 (de) 1971-10-28
CA929226A (en) 1973-06-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees