GB1467055A - Circuit arrangements for protecting and electric power supply line - Google Patents

Circuit arrangements for protecting and electric power supply line

Info

Publication number
GB1467055A
GB1467055A GB825774A GB825774A GB1467055A GB 1467055 A GB1467055 A GB 1467055A GB 825774 A GB825774 A GB 825774A GB 825774 A GB825774 A GB 825774A GB 1467055 A GB1467055 A GB 1467055A
Authority
GB
United Kingdom
Prior art keywords
thyristor
transistor
overload
conduct
capacitor
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
GB825774A
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.)
Indesit Industria Elettrodomestici Italiana SpA
Original Assignee
Indesit Industria Elettrodomestici Italiana SpA
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 Indesit Industria Elettrodomestici Italiana SpA filed Critical Indesit Industria Elettrodomestici Italiana SpA
Publication of GB1467055A publication Critical patent/GB1467055A/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
    • H02H3/02—Details
    • H02H3/06—Details with automatic reconnection
    • H02H3/07—Details with automatic reconnection and with permanent disconnection after a predetermined number of reconnection cycles

Landscapes

  • Electronic Switches (AREA)
  • Protection Of Static Devices (AREA)

Abstract

1467055 Protective arrangement INDESIT INDUSTRIA ELETTRODOMESTICI ITALIANA SpA 22 Feb 1974 [23 Feb 1973] 8257/74 Heading H2K A protection circuit preventing overload of a power supply line comprises a thyristor D911 in the line controlled by pulses from a transistor TR905 to conduct, there being a sensor feeding information representing load conditions via line C to a silicon controlled switch TR907 which when overload conditions prevail blocks transistor TR905 to stop the pulses and turn off thyristor D911 to switch off the line, wherein a capacitor C923 in a resistor-capacitor timing network R933, C923 charges and switches transistor TR905 to conduct again after a predetermined time which if the overload has ended causes thyristor D911 to conduct again, but if the overload persists is prevented by thyristor TR907 from causing the thyristor D911 to conduct, the cycle repeating during prolonged overload for a set number of times until a capacitor C926 of a longer time constant timing circuit R924, R939, C926 has become charged to a value above the Zener voltage of a Zener diode causing transistor TR908 to saturate and permanently block transistor TR906 which causes thyristor D911 to remain off until manual intervention resets the circuit.
GB825774A 1973-02-23 1974-02-22 Circuit arrangements for protecting and electric power supply line Expired GB1467055A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6747273A IT984390B (en) 1973-02-23 1973-02-23 CIRCUITAL ARRANGEMENT TO PROTECT A STABILIZED VOLTAGE POWER SUPPLY

Publications (1)

Publication Number Publication Date
GB1467055A true GB1467055A (en) 1977-03-16

Family

ID=11302679

Family Applications (1)

Application Number Title Priority Date Filing Date
GB825774A Expired GB1467055A (en) 1973-02-23 1974-02-22 Circuit arrangements for protecting and electric power supply line

Country Status (5)

Country Link
DE (1) DE2408657A1 (en)
FR (1) FR2219558B1 (en)
GB (1) GB1467055A (en)
IT (1) IT984390B (en)
NL (1) NL7402344A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236919A (en) * 1989-10-04 1991-04-17 Kone Elevator Gmbh Overload and short-circuit protection of electric output drivers
US5091816A (en) * 1989-10-10 1992-02-25 Kone Elevator Gmbh Procedure and device for overload and short-circuit protection of output drivers
US5319515A (en) * 1990-10-12 1994-06-07 Raychem Limited Circuit protection arrangement
US5465188A (en) * 1990-12-13 1995-11-07 Raychem Limited Circuit protection device
US5625519A (en) * 1990-10-12 1997-04-29 Raychem Limited Circuit protection arrangement
US6118641A (en) * 1991-01-07 2000-09-12 Raychem Limited Overcurrent protection device
US6404608B1 (en) 1990-10-12 2002-06-11 Tyco Electronics Uk Ltd. Overcurrent protection device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3453525A (en) * 1964-10-16 1969-07-01 California Inst Res Found Voltage and current regulated power supply circuit including self-protective features

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2236919A (en) * 1989-10-04 1991-04-17 Kone Elevator Gmbh Overload and short-circuit protection of electric output drivers
GB2236919B (en) * 1989-10-04 1994-03-30 Kone Elevator Gmbh Overload and short-circuit protection circuit
US5091816A (en) * 1989-10-10 1992-02-25 Kone Elevator Gmbh Procedure and device for overload and short-circuit protection of output drivers
US5319515A (en) * 1990-10-12 1994-06-07 Raychem Limited Circuit protection arrangement
US5625519A (en) * 1990-10-12 1997-04-29 Raychem Limited Circuit protection arrangement
US6404608B1 (en) 1990-10-12 2002-06-11 Tyco Electronics Uk Ltd. Overcurrent protection device
US5465188A (en) * 1990-12-13 1995-11-07 Raychem Limited Circuit protection device
US6118641A (en) * 1991-01-07 2000-09-12 Raychem Limited Overcurrent protection device

Also Published As

Publication number Publication date
FR2219558B1 (en) 1978-06-16
FR2219558A1 (en) 1974-09-20
IT984390B (en) 1974-11-20
DE2408657A1 (en) 1974-09-05
NL7402344A (en) 1974-08-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee