GB1030243A - Means for detecting a fault on an electrical supply system - Google Patents

Means for detecting a fault on an electrical supply system

Info

Publication number
GB1030243A
GB1030243A GB434163A GB434163A GB1030243A GB 1030243 A GB1030243 A GB 1030243A GB 434163 A GB434163 A GB 434163A GB 434163 A GB434163 A GB 434163A GB 1030243 A GB1030243 A GB 1030243A
Authority
GB
United Kingdom
Prior art keywords
relay
energize
feb
coil
contacts
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
GB434163A
Inventor
Roger Dudley Salway Crick
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.)
Napier Turbochargers Ltd
Original Assignee
D Napier and Son Ltd
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 D Napier and Son Ltd filed Critical D Napier and Son Ltd
Priority to GB434163A priority Critical patent/GB1030243A/en
Publication of GB1030243A publication Critical patent/GB1030243A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
    • H02H1/0015—Using arc detectors

Landscapes

  • Emergency Alarm Devices (AREA)

Abstract

1,030,243. Protective arrangements. D. NAPIER & SON Ltd. Feb. 27, 1964 [Feb. 1, 1963], No. 4341/63. Heading H2K. A protective arrangement for a resistance heater 11, e.g. for preventing icing on an aircraft, is responsive to frequencies which are substantially higher than the supply frequency and result from arcing. When arcing occurs, the higher frequencies pass through band-pass filters 13, 14 and a D.C. signal obtained through rectifiers 17 is applied to a five-stage transistor amplifier 22 to cause the energizing of the coil 25 of a relay. The relay changes over contacts 26 to complete a holding circuit for itself and changes over contacts 27 to energize a warning lamp 32 and to de-energize the coil 29 of a relay to open its contacts 31 in the supply circuit to the heater 11. To prevent incorrect operation due to transient conditions a time delay is provided by a resistor 35, a capacitor 36 and a Zener diode 38.
GB434163A 1963-02-01 1963-02-01 Means for detecting a fault on an electrical supply system Expired GB1030243A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB434163A GB1030243A (en) 1963-02-01 1963-02-01 Means for detecting a fault on an electrical supply system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB434163A GB1030243A (en) 1963-02-01 1963-02-01 Means for detecting a fault on an electrical supply system

Publications (1)

Publication Number Publication Date
GB1030243A true GB1030243A (en) 1966-05-18

Family

ID=9775367

Family Applications (1)

Application Number Title Priority Date Filing Date
GB434163A Expired GB1030243A (en) 1963-02-01 1963-02-01 Means for detecting a fault on an electrical supply system

Country Status (1)

Country Link
GB (1) GB1030243A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364007A (en) * 1980-04-22 1982-12-14 General Electric Company Unintentional impedance detection system
EP0357343A2 (en) * 1988-09-02 1990-03-07 Council For Scientific And Industrial Research Method and apparatus for protecting electrical equipment
WO1990004278A1 (en) * 1988-10-14 1990-04-19 Volex Group Plc Apparatus and method for detecting a potentially fire generating electrical fault

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4364007A (en) * 1980-04-22 1982-12-14 General Electric Company Unintentional impedance detection system
EP0357343A2 (en) * 1988-09-02 1990-03-07 Council For Scientific And Industrial Research Method and apparatus for protecting electrical equipment
EP0357343A3 (en) * 1988-09-02 1990-12-27 Council For Scientific And Industrial Research Method and apparatus for protecting electrical equipment
WO1990004278A1 (en) * 1988-10-14 1990-04-19 Volex Group Plc Apparatus and method for detecting a potentially fire generating electrical fault

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