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FR2345725A2 - AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch - Google Patents

AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch

Info

Publication number
FR2345725A2
FR2345725A2 FR7608478A FR7608478A FR2345725A2 FR 2345725 A2 FR2345725 A2 FR 2345725A2 FR 7608478 A FR7608478 A FR 7608478A FR 7608478 A FR7608478 A FR 7608478A FR 2345725 A2 FR2345725 A2 FR 2345725A2
Authority
FR
France
Prior art keywords
magnetisable
switch
phase
unbalance
sensed
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.)
Granted
Application number
FR7608478A
Other languages
French (fr)
Other versions
FR2345725B2 (en
Inventor
Thadee Domanski
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.)
Orkem SA
Original Assignee
Chimique des Charbonnages SA
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 Chimique des Charbonnages SA filed Critical Chimique des Charbonnages SA
Priority to FR7608478A priority Critical patent/FR2345725A2/en
Priority to SE7606633A priority patent/SE419810B/en
Priority to DE19762626620 priority patent/DE2626620A1/en
Priority to GB24516/76A priority patent/GB1549631A/en
Priority to IE1290/76A priority patent/IE42861B1/en
Priority to AU14939/76A priority patent/AU501326B2/en
Priority to US05/696,705 priority patent/US4064546A/en
Priority to NL7606588A priority patent/NL7606588A/en
Priority to AR263663A priority patent/AR212864A1/en
Priority to NO762148A priority patent/NO762148L/no
Priority to JP51073737A priority patent/JPS601808B2/en
Priority to DK280476A priority patent/DK280476A/en
Priority to ES449119A priority patent/ES449119A1/en
Priority to IT68529/76A priority patent/IT1063164B/en
Priority to CH796876A priority patent/CH618273A5/fr
Priority to DD193507A priority patent/DD124756A5/xx
Priority to CA255,396A priority patent/CA1080842A/en
Priority to LU75210A priority patent/LU75210A1/xx
Priority to BR7604088A priority patent/BR7604088A/en
Priority to FI761831A priority patent/FI761831A/fi
Publication of FR2345725A2 publication Critical patent/FR2345725A2/en
Application granted granted Critical
Publication of FR2345725B2 publication Critical patent/FR2345725B2/fr
Granted 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
    • H02H3/12—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 underload or no-load
    • H02H3/13—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 underload or no-load 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
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16504—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed
    • G01R19/16509—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the components employed using electromagnetic relays, e.g. reed relay
    • 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
    • H02H3/02—Details
    • H02H3/027—Details with automatic disconnection after a predetermined time

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

Magnetisable flexible blade switches enclosed in glass phials surrounded by a winding and normally used in d.c. circuits. By arranging that half wave rectified currents and phase shifted half wave rectified currents flow in the coils to generate magnetic fields in the same sense, they can be used for protection of three phase motors. A magnetisable flexible blade switch (2) is enclosed in a glass phial (1) on which coils are wound for each mains supply phase. Each coil comprises two half windings (3, 4) and each half winding is connected through a diode (5) to the same supply phase. The windings are positioned to generate magnetic fields in the same sense, thus a fault in one phase causes the switch to operate.
FR7608478A 1975-06-23 1976-03-24 AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch Granted FR2345725A2 (en)

Priority Applications (20)

Application Number Priority Date Filing Date Title
FR7608478A FR2345725A2 (en) 1976-03-24 1976-03-24 AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch
SE7606633A SE419810B (en) 1975-06-23 1976-06-11 DEVICE SENSOR DEVICE
DE19762626620 DE2626620A1 (en) 1975-06-23 1976-06-14 CIRCUIT ARRANGEMENT FOR DETERMINING AN AC CURRENT
GB24516/76A GB1549631A (en) 1975-06-23 1976-06-14 Electrical protection circuits
IE1290/76A IE42861B1 (en) 1975-06-23 1976-06-15 Improvements in and relating to electrical protection circuits
AU14939/76A AU501326B2 (en) 1975-06-23 1976-06-16 Detecting alternating current
US05/696,705 US4064546A (en) 1975-06-23 1976-06-16 Protection circuits
NL7606588A NL7606588A (en) 1975-06-23 1976-06-17 PROCEDURE FOR DETECTING AC POWER.
AR263663A AR212864A1 (en) 1975-06-23 1976-06-18 PROTECTION CIRCUIT TO PROTECT AN ELECTRICAL DEVICE
JP51073737A JPS601808B2 (en) 1975-06-23 1976-06-21 Open phase detection method
NO762148A NO762148L (en) 1975-06-23 1976-06-21
ES449119A ES449119A1 (en) 1975-06-23 1976-06-22 Protection circuits
IT68529/76A IT1063164B (en) 1975-06-23 1976-06-22 ELECTRIC PROTECTION CIRCUIT..PARTICULARLY FOR THREE-PHASE MOTORS
CH796876A CH618273A5 (en) 1975-06-23 1976-06-22
DD193507A DD124756A5 (en) 1975-06-23 1976-06-22
DK280476A DK280476A (en) 1975-06-23 1976-06-22 PROCEDURE FOR DETECTING AN AC
CA255,396A CA1080842A (en) 1975-06-23 1976-06-22 Protection circuits
LU75210A LU75210A1 (en) 1975-06-23 1976-06-22
BR7604088A BR7604088A (en) 1975-06-23 1976-06-23 PROCEDURE FOR THE DETECTION OF AN ALTERNATE CURRENT
FI761831A FI761831A (en) 1975-06-23 1976-06-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7608478A FR2345725A2 (en) 1976-03-24 1976-03-24 AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch

Publications (2)

Publication Number Publication Date
FR2345725A2 true FR2345725A2 (en) 1977-10-21
FR2345725B2 FR2345725B2 (en) 1980-04-04

Family

ID=9170853

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7608478A Granted FR2345725A2 (en) 1975-06-23 1976-03-24 AC supply failure to three phase motor - is sensed by unbalance of magnetic field surrounding magnetisable switch

Country Status (1)

Country Link
FR (1) FR2345725A2 (en)

Also Published As

Publication number Publication date
FR2345725B2 (en) 1980-04-04

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