GB1021705A - Improvements in circuit protection systems - Google Patents

Improvements in circuit protection systems

Info

Publication number
GB1021705A
GB1021705A GB1894364A GB1894364A GB1021705A GB 1021705 A GB1021705 A GB 1021705A GB 1894364 A GB1894364 A GB 1894364A GB 1894364 A GB1894364 A GB 1894364A GB 1021705 A GB1021705 A GB 1021705A
Authority
GB
United Kingdom
Prior art keywords
generator
circuit
comparator
regulator circuit
analogue
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
GB1894364A
Inventor
Kenneth Frank Bacon
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.)
Philips Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB1894364A priority Critical patent/GB1021705A/en
Publication of GB1021705A publication Critical patent/GB1021705A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/06—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors
    • H02H7/065—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric generators; for synchronous capacitors against excitation faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

1, 021, 705. Automatic voltage control. MULLARD Ltd. Dec. 3, 1964 [May 6, 1964], No. 18943/64. Heading G3R. [Also in Division H2] A protective arrangement for a generator comprises an analogue of the regulator circuit of the generator, the analogue circuit and the regulator circuit being connected in parallel and each supplying an input to a comparator which produces an output signal if the input signals differ by more than a predetermined amount, the output signal being arranged to trip the generator or to operate fault indication apparatus. As shown, the output of a generator 1 is compared with a reference voltage source 4 in a comparator 5, the resulting error signal being applied over amplifiers 6, 7 to regulate the current in the generator field 2. The error signal is also applied, by way of a current sensing device 21, to a comparator 20, which also receives an input from a circuit 14, 15, 16, 17 which is an analogue of the regulator circuit 4, 5, 6, 7 and which is connected in parallel with the regulator circuit. If a fault should develop in the regulator circuit the inputs to comparator 20 will differ, and the resulting output from 20 will trip the generator. The protective circuit may be duplicated, and the advantages of the system when used in association with generators operating in parallel are discussed in the specification. The system may be used in conjunction with the usual over-voltage, under-voltage, and earth-fault protection circuits.
GB1894364A 1964-05-06 1964-05-06 Improvements in circuit protection systems Expired GB1021705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1894364A GB1021705A (en) 1964-05-06 1964-05-06 Improvements in circuit protection systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1894364A GB1021705A (en) 1964-05-06 1964-05-06 Improvements in circuit protection systems

Publications (1)

Publication Number Publication Date
GB1021705A true GB1021705A (en) 1966-03-09

Family

ID=10121119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1894364A Expired GB1021705A (en) 1964-05-06 1964-05-06 Improvements in circuit protection systems

Country Status (1)

Country Link
GB (1) GB1021705A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168211A (en) * 1984-11-19 1986-06-11 Nissan Motor Electrical load condition determining apparatus
US4661717A (en) * 1984-11-19 1987-04-28 Nissan Motor Co., Ltd. Load condition determining apparatus

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