ES8601585A1 - Protection and input circuit for telecommunications line - Google Patents

Protection and input circuit for telecommunications line

Info

Publication number
ES8601585A1
ES8601585A1 ES531640A ES531640A ES8601585A1 ES 8601585 A1 ES8601585 A1 ES 8601585A1 ES 531640 A ES531640 A ES 531640A ES 531640 A ES531640 A ES 531640A ES 8601585 A1 ES8601585 A1 ES 8601585A1
Authority
ES
Spain
Prior art keywords
volts
resistors
transmission line
integrated circuits
protection
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
ES531640A
Other languages
Spanish (es)
Other versions
ES531640A0 (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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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
Priority claimed from BE2/60073A external-priority patent/BE896468A/en
Application filed by Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES8601585A1 publication Critical patent/ES8601585A1/en
Publication of ES531640A0 publication Critical patent/ES531640A0/en
Granted 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
    • H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

The protection circuit consists of a series/shunt circuit, a shunt/series circuit (PC2), and two integrated circuits which connect the line to the digital exchange circuits. The two wires of the transmission line are each connected to spark gaps which flash over to earth if the voltage on the lines exceeds 1,000 volts. The lines are then connected via positive temp. coefft. resistors to two semiconductor surge arresters. The resistors and surge arresters limit the voltage passed to 250 volts and the current to 150 mA. Further temp. correction is achieved by a third resistor connected to the second of the two integrated circuits. - This unit is used to protect telephone or other telecommunication exchanges from damage caused by lightning or other abnormally high-amplitude signals occuring on a two-wire transmission line. (0/2)
ES531640A 1983-04-15 1984-04-14 A PROTECTION CIRCUIT WITH A TELECOMMUNICATION LINE CIRCUIT Granted ES531640A0 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2/60073A BE896468A (en) 1983-04-15 1983-04-15 Protection and input circuit for telecommunications line - has two stages of overload reduction to protect exchange from lighting or other abnormal signal

Publications (2)

Publication Number Publication Date
ES8601585A1 true ES8601585A1 (en) 1985-09-01
ES531640A0 ES531640A0 (en) 1985-09-01

Family

ID=3865630

Family Applications (1)

Application Number Title Priority Date Filing Date
ES531640A Granted ES531640A0 (en) 1983-04-15 1984-04-14 A PROTECTION CIRCUIT WITH A TELECOMMUNICATION LINE CIRCUIT

Country Status (2)

Country Link
CH (1) CH665927A5 (en)
ES (1) ES531640A0 (en)

Also Published As

Publication number Publication date
ES531640A0 (en) 1985-09-01
CH665927A5 (en) 1988-06-15

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20041102