GB1089282A - Protection arrangement for telephone lines - Google Patents

Protection arrangement for telephone lines

Info

Publication number
GB1089282A
GB1089282A GB27708/65A GB2770865A GB1089282A GB 1089282 A GB1089282 A GB 1089282A GB 27708/65 A GB27708/65 A GB 27708/65A GB 2770865 A GB2770865 A GB 2770865A GB 1089282 A GB1089282 A GB 1089282A
Authority
GB
United Kingdom
Prior art keywords
conductors
switching devices
devices connected
impedances under
telephone 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
GB27708/65A
Other languages
English (en)
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.)
Danfoss AS
Original Assignee
Danfoss AS
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 Danfoss AS filed Critical Danfoss AS
Publication of GB1089282A publication Critical patent/GB1089282A/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
    • H02H9/044—Physical layout, materials not provided for elsewhere
    • 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
    • H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults
    • H04M1/745—Protection devices or circuits for voltages surges on the line

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
GB27708/65A 1964-07-03 1965-06-30 Protection arrangement for telephone lines Expired GB1089282A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0044837 1964-07-03

Publications (1)

Publication Number Publication Date
GB1089282A true GB1089282A (en) 1967-11-01

Family

ID=7048585

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27708/65A Expired GB1089282A (en) 1964-07-03 1965-06-30 Protection arrangement for telephone lines

Country Status (7)

Country Link
US (1) US3436601A (https=)
JP (1) JPS4215227B1 (https=)
CH (1) CH427003A (https=)
DE (1) DE1437387A1 (https=)
FR (1) FR1441855A (https=)
GB (1) GB1089282A (https=)
NL (1) NL6508411A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160721A (en) * 1984-05-19 1985-12-24 Measurement Tech Ltd Protection of electrical/electronic equipment

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3558830A (en) * 1969-04-09 1971-01-26 Communication Technology Inc Overvoltage transmission line protector
US3813558A (en) * 1972-06-26 1974-05-28 Ibm Directional, non-volatile bistable resistor logic circuits
FR2472272A1 (fr) * 1979-12-21 1981-06-26 Lignes Telegraph Telephon Composant hybride de protection et circuit l'incorporant
NL8006411A (nl) * 1980-11-25 1982-06-16 Philips Nv Inrichting voor het beveiligen tegen oververhitting door overspanning van een spanningsbegrenzende schakeling.
FR2552604B1 (fr) * 1983-09-27 1989-02-24 Europ Composants Electron Circuit de protection telephonique contre les perturbations electriques
AU584998B2 (en) * 1985-03-29 1989-06-08 Raychem Limited Circuit protection device
EP0198624A1 (en) * 1985-03-29 1986-10-22 Raychem Limited Overvoltage protection device
ES8900238A1 (es) * 1985-03-29 1989-04-01 Raychem Ltd Un conectador electrico para conectar una pluralidad de lineas electricas.
EP0242902A3 (en) * 1986-03-26 1988-08-31 Raychem Limited Protection device
US4860155A (en) * 1986-03-28 1989-08-22 Raychem Limited Overvoltage protection device
GB8621430D0 (en) * 1986-09-05 1987-01-14 Raychem Ltd Overvoltage protection device
US4799125A (en) * 1986-09-05 1989-01-17 Raychem Limited Circuit protection arrangement
GB8623178D0 (en) * 1986-09-26 1987-01-14 Raychem Ltd Circuit protection device
GB8623177D0 (en) * 1986-09-26 1987-01-14 Raychem Ltd Circuit protection device
GB8623176D0 (en) * 1986-09-26 1987-01-14 Raychem Ltd Circuit protection device
GB8802434D0 (en) * 1988-02-03 1988-03-02 British Telecomm Protector device
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
EP0360933A1 (en) * 1988-09-28 1990-04-04 Semitron Industries Limited An improved transient suppression device
GB2225908B (en) * 1988-11-11 1993-01-13 Texas Instruments Ltd Improvements in or relating to overvoltage protection circuits
US5714794A (en) * 1995-04-18 1998-02-03 Hitachi Chemical Company, Ltd. Electrostatic protective device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE536185A (https=) * 1954-03-05 1900-01-01
US2789254A (en) * 1954-04-23 1957-04-16 Bell Telephone Labor Inc Lightning protection circuits
NL258073A (https=) * 1960-11-17
US3210641A (en) * 1961-02-28 1965-10-05 Hunt Electronics Company Power control circuit employing semiconductor switching means responsive to the saturation of a magnetic amplifier
US3271591A (en) * 1963-09-20 1966-09-06 Energy Conversion Devices Inc Symmetrical current controlling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2160721A (en) * 1984-05-19 1985-12-24 Measurement Tech Ltd Protection of electrical/electronic equipment

Also Published As

Publication number Publication date
JPS4215227B1 (https=) 1967-08-23
NL6508411A (https=) 1966-01-04
CH427003A (de) 1966-12-31
DE1437387A1 (de) 1968-11-28
FR1441855A (fr) 1966-06-10
US3436601A (en) 1969-04-01

Similar Documents

Publication Publication Date Title
GB1089282A (en) Protection arrangement for telephone lines
GB1256780A (https=)
GB1107879A (en) Improvements in or relating to earth leakage protection devices
GB977913A (en) Improvements in or relating to electrical apparatus and systems
GB1097809A (en) Improved circuit breaker control system
CA953013A (en) Electric circuit breaker with ground fault protection
GB1031472A (en) Overload protection circuits
GB1314270A (en) Inductance coil devices
GB1040193A (en) Read-only memory system
GB966611A (en) Protective arrangements for electrical circuits and apparatus
AU245632B2 (en) Electrical protection systems
AU313761A (en) Electrical protection systems
CA632498A (en) Protection of connections between electrical conductors
AU255840B2 (en) Improvements in terminal glands foe armoured electrical cables
CA598747A (en) Three terminal telephone substation and system embodying the same
CA631424A (en) Electrically conductive systems
CA610374A (en) Power network protection relay systems incorporating multi-control electrode electronic devices
AU249603B2 (en) Improvements in or relating to electric carrer communication systems
CA656473A (en) Voltage regulator and overload protection system
CA625242A (en) Electrical protective relay systems
CA902722A (en) Overvoltage protective circuit for hvdc terminal
AU262838B2 (en) Improvements relating to polyphase alternating c current electrical protection systems
CA669323A (en) Arc-quenching compound and electrical equipment utilizing same
AU268398B2 (en) Electronic switching telephone system
AU258604B2 (en) Electronic switching telephone system