FR2252682A1 - Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads - Google Patents

Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads

Info

Publication number
FR2252682A1
FR2252682A1 FR7342255A FR7342255A FR2252682A1 FR 2252682 A1 FR2252682 A1 FR 2252682A1 FR 7342255 A FR7342255 A FR 7342255A FR 7342255 A FR7342255 A FR 7342255A FR 2252682 A1 FR2252682 A1 FR 2252682A1
Authority
FR
France
Prior art keywords
breaker
transformer
circuit
thermocouple
electronic circuit
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
FR7342255A
Other languages
French (fr)
Other versions
FR2252682B3 (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.)
SIMPLEX APPAREILS
Original Assignee
SIMPLEX APPAREILS
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 SIMPLEX APPAREILS filed Critical SIMPLEX APPAREILS
Priority to FR7342255A priority Critical patent/FR2252682A1/en
Publication of FR2252682A1 publication Critical patent/FR2252682A1/en
Application granted granted Critical
Publication of FR2252682B3 publication Critical patent/FR2252682B3/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
    • H02H3/08—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
    • 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
    • H02H3/10—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 additionally responsive to some other abnormal electrical conditions
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H6/00—Emergency protective circuit arrangements responsive to undesired changes from normal non-electric working conditions using simulators of the apparatus being protected, e.g. using thermal images

Abstract

The circuit-breaker which is used for transformer protection is tripped by two conditions. The first is a low overload which is detected across resistance in the windings. A photo-diode (18) senses the voltage across the resistance by means of a light-emitting diode (14) and trips the breaker via an amplifier. The second condition is a large overload which is detected by a thermo-couple inserted into a conductor in a beryllium oxide cup which has high electrical insulation but low thermal resistance. The thermo-couple causes a threshold circuit to trip which operates the circuit-breaker. This samples the transformer temperature accurately and overcomes the difficulties of complex mechanical circuit-breakers.
FR7342255A 1973-11-22 1973-11-22 Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads Granted FR2252682A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7342255A FR2252682A1 (en) 1973-11-22 1973-11-22 Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7342255A FR2252682A1 (en) 1973-11-22 1973-11-22 Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads

Publications (2)

Publication Number Publication Date
FR2252682A1 true FR2252682A1 (en) 1975-06-20
FR2252682B3 FR2252682B3 (en) 1976-10-08

Family

ID=9128351

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7342255A Granted FR2252682A1 (en) 1973-11-22 1973-11-22 Electronic circuit-breaker for transformer - thermocouple and resistor detect large and small overloads

Country Status (1)

Country Link
FR (1) FR2252682A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379930A1 (en) * 1977-02-08 1978-09-01 Ass Eng Ltd OVERLOAD PROTECTION CIRCUIT LAYOUT
FR2581265A1 (en) * 1985-04-29 1986-10-31 Merlin Gerin Thermal image trip.
EP0444826A2 (en) * 1990-02-26 1991-09-04 Fuji Electric Co. Ltd. Protection circuit for a semiconductor device
FR2671917A1 (en) * 1991-02-21 1992-07-24 Cgae Satelem System for control of the electrical energy power supply and the protection of an electrical receiver device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2379930A1 (en) * 1977-02-08 1978-09-01 Ass Eng Ltd OVERLOAD PROTECTION CIRCUIT LAYOUT
FR2581265A1 (en) * 1985-04-29 1986-10-31 Merlin Gerin Thermal image trip.
EP0444826A2 (en) * 1990-02-26 1991-09-04 Fuji Electric Co. Ltd. Protection circuit for a semiconductor device
EP0444826A3 (en) * 1990-02-26 1992-12-16 Fuji Electric Co. Ltd. Protection circuit for a semiconductor device
FR2671917A1 (en) * 1991-02-21 1992-07-24 Cgae Satelem System for control of the electrical energy power supply and the protection of an electrical receiver device

Also Published As

Publication number Publication date
FR2252682B3 (en) 1976-10-08

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