GB1078549A - Overload (e.g. overcurrent or overvoltage) protection - Google Patents

Overload (e.g. overcurrent or overvoltage) protection

Info

Publication number
GB1078549A
GB1078549A GB1737866A GB1737866A GB1078549A GB 1078549 A GB1078549 A GB 1078549A GB 1737866 A GB1737866 A GB 1737866A GB 1737866 A GB1737866 A GB 1737866A GB 1078549 A GB1078549 A GB 1078549A
Authority
GB
United Kingdom
Prior art keywords
thyristor
resistor
contacts
relay
overvoltage
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
GB1737866A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB1078549A publication Critical patent/GB1078549A/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
    • H02H3/021—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order
    • H02H3/023—Details concerning the disconnection itself, e.g. at a particular instant, particularly at zero value of current, disconnection in a predetermined order by short-circuiting
    • 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

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

1,078,549. Protective arrangements. TELEFONAKTIEBOLAGET L. M. ERICSSON. April 20, 1966 [April 20, 1965], No. 17378/66. Heading H2K. In a supply circuit including a power regulator or similar device S and a low-pass filter L, C, a relay Re responsive to over-current and overvoltage has its contacts 12 connected in series with a resistor R2 between one of the output conductors and the control electrode of a thyratron or thyristor D1 which is connected in series with a resistor R1 across the input conductors. When an excess current occurs the relay winding 11 is sufficiently energized to close the contacts 12 to render the thyristor D1 conducting. The current which now flows through the thyristor D1 and resistor R1 is sufficient to trip a circuit-breaker or to blow a fuse F1. Should the output voltage be excessive, a Zener diode D2 breaks down so that a winding 10 of the relay Re is energized to close the contacts 12.
GB1737866A 1965-04-20 1966-04-20 Overload (e.g. overcurrent or overvoltage) protection Expired GB1078549A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE508865 1965-04-20

Publications (1)

Publication Number Publication Date
GB1078549A true GB1078549A (en) 1967-08-09

Family

ID=20265672

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1737866A Expired GB1078549A (en) 1965-04-20 1966-04-20 Overload (e.g. overcurrent or overvoltage) protection

Country Status (2)

Country Link
GB (1) GB1078549A (en)
NO (1) NO118930B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095874A1 (en) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Overcurrent switching apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007095874A1 (en) * 2006-02-23 2007-08-30 Siemens Aktiengesellschaft Overcurrent switching apparatus
JP2009527878A (en) * 2006-02-23 2009-07-30 シーメンス アクチエンゲゼルシヤフト Overcurrent switchgear

Also Published As

Publication number Publication date
NO118930B (en) 1970-03-02

Similar Documents

Publication Publication Date Title
US3803455A (en) Electric circuit breaker static trip unit with thermal override
GB1214682A (en) Circuits comprising current limiting devices
GB1044667A (en) Fast response overload protection circuit
JPS6477426A (en) Protective circuit for semiconductor circuit
GB1019245A (en) Improvements in or relating to electrical overload protection apparatus
US3311787A (en) Transistorized circuit breaker
US3177402A (en) Over-current protective circuits
GB1151078A (en) Improvements in or relating to D.C. Voltage Regulators.
ES325953A1 (en) A device for the protection of a semiconductor device against overvoltages and/or overload. (Machine-translation by Google Translate, not legally binding)
GB1465721A (en) Ground fault detector
GB981752A (en) Improvements in or relating to electrical protective relays
GB1475142A (en) Protecting an electronic switching arrangement
GB1078549A (en) Overload (e.g. overcurrent or overvoltage) protection
US3390307A (en) Electrical relays
US3663863A (en) Overcurrent protector
US3256448A (en) Protection circuit of a transistor type direct current constant voltage device
US3689800A (en) Arrangement for disconnecting consumers from a direct current voltage supply source
US3407314A (en) Transient protection
US3346797A (en) Static relay control circuit
GB950183A (en) Improvements in and relating to electrical circuits employing transistor networks
GB1234556A (en) Improvements in or relating to electrical circuit protection devices
GB1311950A (en) Electrical overcurrent protection means
GB1209738A (en) Pushbutton-operated overload circuit breaker
GB1129178A (en) Improvements relating to overload protection in electric supply systems
GB928814A (en) Improvements relating to voltage stabiliser circuits