GB1106805A - Electronic protection apparatus - Google Patents

Electronic protection apparatus

Info

Publication number
GB1106805A
GB1106805A GB38716/65A GB3871665A GB1106805A GB 1106805 A GB1106805 A GB 1106805A GB 38716/65 A GB38716/65 A GB 38716/65A GB 3871665 A GB3871665 A GB 3871665A GB 1106805 A GB1106805 A GB 1106805A
Authority
GB
United Kingdom
Prior art keywords
circuit
negator
pulses
input current
signal
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
GB38716/65A
Inventor
Hans Schnabel
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.)
STARKSTROM ANLAGENBAU ERFURT
Original Assignee
STARKSTROM ANLAGENBAU ERFURT
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 STARKSTROM ANLAGENBAU ERFURT filed Critical STARKSTROM ANLAGENBAU ERFURT
Priority to GB38716/65A priority Critical patent/GB1106805A/en
Publication of GB1106805A publication Critical patent/GB1106805A/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
    • H02H3/20—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 voltage
    • 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
    • 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
    • H02H3/093—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 with timing means
    • 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
    • H02H7/20—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 electronic equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

1,106,805. Protective arrangements. STARKSTROM-ANLAGENBAU ERFURT. 10 Sept., 1965, No. 38716/65. Heading H2K. An overcurrent protective arrangement for an A.C. circuit has a Schmitt trigger 8 which shapes the input current into pulses each having a duration dependent on the magnitude of the input current. These pulses are applied to a monostable circuit 12 and a negator 9, both connected to an OR element 15. When the pulse duration is sufficiently long, the monostable circuit 12 changes to its unstable stable and this circuit 12 and the negator 9 both apply an O signal to the element 15, so that a further negator 16 connected to the OR element 15 provides a 1 signal on each pulse. The frequency of these pulses is reduced by a frequency divider and the resulting pulses are applied to counting stages so that after a predetermined number of pulses a tripping circuit is energized, Fig. 2 (not shown). The negator 16 may also control an indicator 19 through a bi-stable circuit 17 and amplifier 18. A further monostable circuit (as 12) and a further OR element (as 15) may be associated with the negator 9 for response to a longer pulse duration and to control the tripping circuit without the delay of the counting stages.
GB38716/65A 1965-08-09 1965-09-10 Electronic protection apparatus Expired GB1106805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB38716/65A GB1106805A (en) 1965-08-09 1965-09-10 Electronic protection apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEV0029075 1965-08-09
GB38716/65A GB1106805A (en) 1965-08-09 1965-09-10 Electronic protection apparatus

Publications (1)

Publication Number Publication Date
GB1106805A true GB1106805A (en) 1968-03-20

Family

ID=7584595

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38716/65A Expired GB1106805A (en) 1965-08-09 1965-09-10 Electronic protection apparatus

Country Status (3)

Country Link
BE (1) BE669284A (en)
DE (1) DE1513689A1 (en)
GB (1) GB1106805A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956670A (en) * 1973-01-30 1976-05-11 Westinghouse Electric Corporation Circuit interrupter circuit including improved control
DE2634743A1 (en) * 1976-07-08 1978-01-12 Bbc Brown Boveri & Cie CURRENT MEASUREMENT INPUT FOR ELECTRONIC RELAY
GB2131239A (en) * 1982-09-10 1984-06-13 Matsushita Electric Works Ltd Current detecting device
DE4026799A1 (en) * 1990-08-24 1992-02-27 Licentia Gmbh Selective detection of faults in conductors in high voltage network - by comparing conductor voltages and currents with earth current and star earth voltage

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982158A (en) * 1974-07-15 1976-09-21 Hughes Aircraft Company Power distribution control system
DE3209562A1 (en) * 1982-03-16 1983-09-29 Siemens AG, 1000 Berlin und 8000 München CIRCUIT FOR DETECTING AND STORING NETWORK ERRORS

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3956670A (en) * 1973-01-30 1976-05-11 Westinghouse Electric Corporation Circuit interrupter circuit including improved control
DE2634743A1 (en) * 1976-07-08 1978-01-12 Bbc Brown Boveri & Cie CURRENT MEASUREMENT INPUT FOR ELECTRONIC RELAY
GB2131239A (en) * 1982-09-10 1984-06-13 Matsushita Electric Works Ltd Current detecting device
DE4026799A1 (en) * 1990-08-24 1992-02-27 Licentia Gmbh Selective detection of faults in conductors in high voltage network - by comparing conductor voltages and currents with earth current and star earth voltage

Also Published As

Publication number Publication date
BE669284A (en) 1965-12-31
DE1513689A1 (en) 1969-10-23

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