GB1022532A - Direct current interrupting arrangement - Google Patents

Direct current interrupting arrangement

Info

Publication number
GB1022532A
GB1022532A GB720362A GB720362A GB1022532A GB 1022532 A GB1022532 A GB 1022532A GB 720362 A GB720362 A GB 720362A GB 720362 A GB720362 A GB 720362A GB 1022532 A GB1022532 A GB 1022532A
Authority
GB
United Kingdom
Prior art keywords
rectifier
transistor
transistors
conducting
resistor
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
GB720362A
Inventor
James Anthony Darke
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB720362A priority Critical patent/GB1022532A/en
Priority to FR925680A priority patent/FR1357095A/en
Publication of GB1022532A publication Critical patent/GB1022532A/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
    • H02H3/08—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
    • H02H3/087—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 for dc applications
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/72—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region
    • H03K17/73—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices having more than two PN junctions; having more than three electrodes; having more than one electrode connected to the same conductivity region for dc voltages or currents

Abstract

1,022,532. Protective arrangements. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 14, 1963 [Feb. 23, 1962], No. 7203/62. Heading H2K. An arrangement for interrupting the supply of current from a D.C. source Tl, T2 to a load LD comprises a semi-conductor controlled rectifier CR1 and a tripping circuit including a pair of transistors TR1, TR2 to provide a control signal to the control electrode of the rectifier to render it non-conductive in the event of overload. The rectifier CR1 is initially switched on by a current pulse through a manually operated switch SW, a capacitor C2 and a resistor R6. When the overload occurs, the voltage across a series resistor R1 applied to the base of transistor TR1 becomes sufficient to cause the transistor TR1 to start conducting so that current flows through a resistor R4 and starts transistor TR2 conducting. This causes both transistors to reach full conduction rapidly and to apply a tripping signal to the control electrode of the rectifier CR1 to render it non-conducting. Fig. 2 (not shown) illustrates a modified arrangement using a third amplifying transistor, the three transistors having their power supply from a separate source.
GB720362A 1962-02-23 1962-02-23 Direct current interrupting arrangement Expired GB1022532A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB720362A GB1022532A (en) 1962-02-23 1962-02-23 Direct current interrupting arrangement
FR925680A FR1357095A (en) 1962-02-23 1963-02-22 Safety switch device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB720362A GB1022532A (en) 1962-02-23 1962-02-23 Direct current interrupting arrangement

Publications (1)

Publication Number Publication Date
GB1022532A true GB1022532A (en) 1966-03-16

Family

ID=9828590

Family Applications (1)

Application Number Title Priority Date Filing Date
GB720362A Expired GB1022532A (en) 1962-02-23 1962-02-23 Direct current interrupting arrangement

Country Status (1)

Country Link
GB (1) GB1022532A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2148633A (en) * 1983-10-13 1985-05-30 Thermonette Appliances Ltd Improvements in or relating to electrical circuits
GB2243732A (en) * 1990-04-30 1991-11-06 Teledyne Ind Temperature compensated overload trip level solid state relay.
GB2245114A (en) * 1990-05-31 1991-12-18 Toshiba Kk Overcurrent detector with biased sense resistor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2148633A (en) * 1983-10-13 1985-05-30 Thermonette Appliances Ltd Improvements in or relating to electrical circuits
GB2243732A (en) * 1990-04-30 1991-11-06 Teledyne Ind Temperature compensated overload trip level solid state relay.
GB2243732B (en) * 1990-04-30 1994-08-10 Teledyne Ind Temperature compensated overload trip level solid state relay
GB2245114A (en) * 1990-05-31 1991-12-18 Toshiba Kk Overcurrent detector with biased sense resistor
GB2245114B (en) * 1990-05-31 1994-11-23 Toshiba Kk Overcurrent detector

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