GB1165568A - Electronic Circuit Protector. - Google Patents

Electronic Circuit Protector.

Info

Publication number
GB1165568A
GB1165568A GB5462966A GB5462966A GB1165568A GB 1165568 A GB1165568 A GB 1165568A GB 5462966 A GB5462966 A GB 5462966A GB 5462966 A GB5462966 A GB 5462966A GB 1165568 A GB1165568 A GB 1165568A
Authority
GB
United Kingdom
Prior art keywords
switch
control circuit
circuit
gain
amplifier
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
GB5462966A
Inventor
Gordon Alfred Roberts
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.)
Mechanical Products Inc
Original Assignee
Mechanical Products Inc
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 Mechanical Products Inc filed Critical Mechanical Products Inc
Publication of GB1165568A publication Critical patent/GB1165568A/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
    • H02H3/093—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
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/04—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks
    • H02H1/043—Arrangements for preventing response to transient abnormal conditions, e.g. to lightning or to short duration over voltage or oscillations; Damping the influence of dc component by short circuits in ac networks to inrush currents
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

1,165,568. Protective arrangements. MECHANICAL PRODUCTS Inc. 6 Dec., 1966, No. 54629/66. Heading H2K. An overload protective system for an electronic load comprises a controlled switch and a control circuit having a time dependent characteristic for controlling the switch. The control circuit includes a current sensing device, a variable gain amplifier, and a threshold circuit effective to apply a signal to a switch control circuit. A generalized function circuit may effect full wave rectification or otherwise modify the output signal from the amplifier before its application to the threshold circuit. The switch control circuit includes an inhibiting arrangement to prevent, for approximately two cycles, operation of the system in response to transient conditions arising on the initial connection of the load. The switch control circuit, in addition to effecting the operation of the controlled switch, also controls the operation of a " generalized gain control function " circuit which, after a delay of 60 to 180 milliseconds imposed by a single shot multi-vibrator, renders the system more sensitive by increasing the gain of the amplifier. This increase in gain may be effected by lighting a lamp to change the resistance of a photoelectric cell in circuit with the amplifier. Should the lamp fail then the gain control circuit provides a signal which causes the switch control circuit to open the controlled switch. An " input on-off-reset control," e.g. a manually operable switch, may be used to control the opening and closing of the controlled switch. The whole system is formed by semi-conductor devices and is described in detail in the Specification with the aid of a circuit diagram, Figs. 2 to 5 (not shown).
GB5462966A 1966-12-16 1966-12-06 Electronic Circuit Protector. Expired GB1165568A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE691362 1966-12-16

Publications (1)

Publication Number Publication Date
GB1165568A true GB1165568A (en) 1969-10-01

Family

ID=3849892

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5462966A Expired GB1165568A (en) 1966-12-16 1966-12-06 Electronic Circuit Protector.

Country Status (4)

Country Link
BE (1) BE691362A (en)
DE (1) DE1563584A1 (en)
GB (1) GB1165568A (en)
NL (1) NL6617039A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212679A (en) * 1987-11-16 1989-07-26 Lai Chin Fay Overcurrent circuit breaker with time delay

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996029770A1 (en) * 1995-03-20 1996-09-26 Siemens Aktiengesellschaft Delayed-action fault current of differential current circuit-breaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2212679A (en) * 1987-11-16 1989-07-26 Lai Chin Fay Overcurrent circuit breaker with time delay
GB2212679B (en) * 1987-11-16 1992-01-15 Lai Chin Fay Over current circuit breaker

Also Published As

Publication number Publication date
NL6617039A (en) 1968-06-04
BE691362A (en) 1967-05-29
DE1563584A1 (en) 1970-05-27

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees