GB1163795A - Over-Voltage Protection Circuit - Google Patents

Over-Voltage Protection Circuit

Info

Publication number
GB1163795A
GB1163795A GB25479/67A GB2547967A GB1163795A GB 1163795 A GB1163795 A GB 1163795A GB 25479/67 A GB25479/67 A GB 25479/67A GB 2547967 A GB2547967 A GB 2547967A GB 1163795 A GB1163795 A GB 1163795A
Authority
GB
United Kingdom
Prior art keywords
impedance
voltage
resistor
thyristors
lines
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
GB25479/67A
Inventor
John Robin Musham
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 GB25479/67A priority Critical patent/GB1163795A/en
Priority to US718544A priority patent/US3518489A/en
Priority to DE19681763292 priority patent/DE1763292A1/en
Priority to FR1566130D priority patent/FR1566130A/fr
Priority to SE07357/68A priority patent/SE331311B/xx
Publication of GB1163795A publication Critical patent/GB1163795A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage

Abstract

1,163,795. Overvoltage protection. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. 10 April, 1968 [2 June, 1967], No. 25479/67. Heading H2H. An overvoltage protection arrangement for a load L which may comprise semi-conductor devices comprises a fixed resistor R in series with a non-linear impedance M shunting the load L, a voltage breakdown device T being connected across the resistor R, the characteristic of the impedance M being such that as the voltage thereacross increases the impedance thereof decreases. Thus when the voltage between lines 1, 2 is excessive the voltage across the resistor reaches a value large enough to cause breakdown of the device T. The full-line voltage is then applied to the impedance M which then assumes a low-impedance state such that a lowresistance path is created which absorbs the overvoltage between the lines 1, 2. The device T may be an untriggered thyristor or bi-directional device such as a TRIAC. Alternatively a bridge circuit of thyristors or thyristors and diodes may be used.
GB25479/67A 1967-06-02 1967-06-02 Over-Voltage Protection Circuit Expired GB1163795A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB25479/67A GB1163795A (en) 1967-06-02 1967-06-02 Over-Voltage Protection Circuit
US718544A US3518489A (en) 1967-06-02 1968-04-03 Voltage suppression circuit
DE19681763292 DE1763292A1 (en) 1967-06-02 1968-04-30 Overvoltage protection circuit
FR1566130D FR1566130A (en) 1967-06-02 1968-05-29
SE07357/68A SE331311B (en) 1967-06-02 1968-05-31

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB25479/67A GB1163795A (en) 1967-06-02 1967-06-02 Over-Voltage Protection Circuit

Publications (1)

Publication Number Publication Date
GB1163795A true GB1163795A (en) 1969-09-10

Family

ID=10228377

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25479/67A Expired GB1163795A (en) 1967-06-02 1967-06-02 Over-Voltage Protection Circuit

Country Status (5)

Country Link
US (1) US3518489A (en)
DE (1) DE1763292A1 (en)
FR (1) FR1566130A (en)
GB (1) GB1163795A (en)
SE (1) SE331311B (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889222A (en) * 1973-11-07 1975-06-10 Tokyo Shibaura Electric Co Surge voltage absorber
JPS515630U (en) * 1974-06-28 1976-01-16
US3947726A (en) * 1974-12-18 1976-03-30 General Electric Co. Reverse voltage surge protection for high-voltage thyristors
JPS51162943U (en) * 1975-06-19 1976-12-25
US4068279A (en) * 1976-10-28 1978-01-10 Byrnes Gerald J Power monitor
JPS54139736A (en) * 1978-04-21 1979-10-30 Sharp Corp Electrophotographic copier
DE2850559A1 (en) * 1978-11-22 1980-05-29 Faber Castell A W SHARPENER FOR MINES AND COATED RECORDING PENCILS
US4419711A (en) * 1979-12-28 1983-12-06 Seguin Herb J J Method and apparatus for the protection of electrical equipment from high voltage transients
US4328523A (en) * 1979-12-28 1982-05-04 Home Oil Company Limited Method and apparatus for the protection of electrical equipment from high voltage transients
US4347539A (en) * 1981-06-03 1982-08-31 Westinghouse Electric Corp. Electrical equipment protective apparatus with energy balancing among parallel varistors
DE3412264A1 (en) * 1984-04-02 1985-10-10 Steute-Schaltgerätebau G. Sölken, 4972 Löhne Switch for monitoring movement sequences
US4814941A (en) * 1984-06-08 1989-03-21 Steelcase Inc. Power receptacle and nested line conditioner arrangement
DE3584239D1 (en) * 1984-12-24 1991-10-31 Nippon Telegraph & Telephone PROTECTIVE CIRCUIT.
GB8816631D0 (en) * 1988-07-13 1988-08-17 Raychem Ltd Circuit protection arrangement
IL90944A0 (en) * 1988-07-13 1990-02-09 Raychem Ltd Electrical circuit protection arrangement
US5714794A (en) * 1995-04-18 1998-02-03 Hitachi Chemical Company, Ltd. Electrostatic protective device
BE1010412A3 (en) * 1996-07-09 1998-07-07 Philips Electronics Nv Shifting.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3246206A (en) * 1965-02-25 1966-04-12 Gen Electric Voltage surge protector
US3435293A (en) * 1965-12-30 1969-03-25 Texas Instruments Inc Apparatus for providing instantaneous overload protection especially useful in protecting semiconductive devices
US3418530A (en) * 1966-09-07 1968-12-24 Army Usa Electronic crowbar

Also Published As

Publication number Publication date
FR1566130A (en) 1969-05-02
DE1763292A1 (en) 1972-01-13
US3518489A (en) 1970-06-30
SE331311B (en) 1970-12-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees